Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Hello,
A french forum mate found a sort of "bubble nebula" on one of his picture.
We don't find anything at its subject.
Perhaps somebody know about this one.
It's a better view than the one of my forum mate on this page : http://www.astro-pics.com/6888-b.htm
You can see this bubble on the top right part of the picture
Do you know if it's a referenced object ?
Thanks
Denis
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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Brooklyn
scholastic sledgehammer
Reged: 07/24/08
Posts: 870
Loc: Central New Jersey
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looks like a human brain 
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Meade 8.25"(209.55mm) LX-90 EMC (SCT)
Albert Einstein =>
“Intellectual growth should commence at birth and cease only at death.”
“If you can't explain it simply, you don't understand it well enough.”
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OldDeadOne
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Reged: 09/09/06
Posts: 1143
Loc: West Virginia
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I see two objects in the upper left of that picture that are roundish,and nothing in the upper right,but in the middle that sure does look like Galaxtus popped his brain right out of his head :P
Edit: I see the round spot,and it doesn't show up on another pic for comparison: http://www.jburnell.com/STL11000/IC1318-NGC6888HaHaGB_small.jpg
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Bert O'Dell
PROUD GOTO USER
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Bill Weir
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Reged: 06/01/04
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If he can figure out the rather precise coordinates I suggest he uses this tool.
http://simbad.u-strasbg.fr/simbad/
Bill
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6'' Orion SkyQuest
12.5'' f/5 Custom Truss Dob
William Optics 80mm ZenithStar ED II
f/5 25" newtonian on a giant GEM, any time I want
Observing sessions grand total for 2008, 121.
So far in 2009, 92
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Thanks for your answer.
We found this round nebula on many other pictures and on the DSS plates but it's very faint and you need a strong contrast to see it. That's certainly why it's not referenced.
Aladin and simbad have been use, but without success.
The coordinates are 20h15'21" 38°02'35"
Another view with the object faintly visible in the lower part slightly on the left :
http://www.rivesmax.fr/images/nebuleuses/crop.jpg
Not a big deal by the way, just curiosity.
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
Edited by Denis (09/01/08 05:06 AM)
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reiner
super member
Reged: 09/28/05
Posts: 100
Loc: Freiburg, Germany
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Hi Denis,
looks very interesting, like one of the more evolved PN shells. It is not extremely faint, there are several Abell PN, which are in the same category, as judged from their appearance on the POSS plates. Maybe you discovered a new one?
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Reiner
22" and 14" Dobs on EQ platforms
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BillFerris
Carpal Tunnel
Reged: 07/17/04
Posts: 2910
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Yesterday, I looked at the POSS-I and POSS-II plates through Skyview and the annulus is faintly visible in the DSS, DSS2 blue and DSS2 red images. It is centered approximately at 20 15 21.4, +38 02 32.7 and appears to be ~ 5' in diameter.
My immediate thought when seeing the object was, "Planetary nebula?" I checked Megastar and SIMBAD, but neither indicates an extended object at the above coordinates. Yesterday, I emailed Brian Skiff at Lowell. Brian confirmed that it appears to be a real object and suggested contacting Dave Riddle, who has studied the planetary nebulae catalogs in great detail. Late last night, I emailed Dave and am awaiting his response.
Bill in Flag
--------------------
Grand Canyon Adventure
Lowering the Threshold
18" Obsession
4.5" Meade 4500
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Cosmic Voyage
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Reiner, I'm not the discoverer, but the subject pop up on a french forum and nobody found a solution. So I ask here.
And yes, looks like a nice NP. Too bad My 14" will certainly never show this one to me. Maybe a challenge for the great dobs ?
Bill thank you for your search and for spending some time on this one.
So awaiting also the Dave's response.
Perhaps somebody'll finally put a name or a definition on this one.
Denis
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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Stefan Rostyne
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Reged: 10/19/04
Posts: 1009
Loc: Assenede, Belgium
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If you mean the bubble in the crop attached, then i think it is just an imaging or processing artifact.
Look either like a reflection jumping of an equipment part, or a photoshop dodge with a wrong set feather that was forgotten to remove.
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Stefan Van de Rostijne
4.5" F4.5 newt 5°widefield/finderscope
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reiner
super member
Reged: 09/28/05
Posts: 100
Loc: Freiburg, Germany
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Hi Stefan,
as mentioned in the discussion of Denis' posting, the same object is on the POSS II blue AND red plates, as you can easily verify.
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Reiner
22" and 14" Dobs on EQ platforms
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Stefan Rostyne
Pooh-Bah
Reged: 10/19/04
Posts: 1009
Loc: Assenede, Belgium
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I can see a dim, blurred 'round' cloud of gas in the POSS plates. Not the sharp bright object that we see presented here. I also see that the dim glow on the POSS plates is on the same location of the sharp ring. Therefore I conclude that it is an imaging artifact. It is dodged too hard without use of a feather.
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Stefan Van de Rostijne
4.5" F4.5 newt 5°widefield/finderscope
8" f/5.6 travel dob
old 12.5" F5 dob (used to look better...)
30 cm f/30 Classic Cassegrain (polishing primary)
23" f/4 dob project
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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When searching you can find it on many other pictures at different levels.
And somebody just post this link on the french forum :
http://www.lostvalleyobservatory.com/review.nebula1/
This one won't be a french discovery 
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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OldDeadOne
Pooh-Bah
Reged: 09/09/06
Posts: 1143
Loc: West Virginia
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I bet it's too dim for me to view with my 10" then lol?
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Bert O'Dell
PROUD GOTO USER
LX200 10" Classic
various meade plossi's eyepieces
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Insane under a full moon
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GlennLeDrew
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Reged: 06/18/08
Posts: 1283
Loc: Ottawa, Ontario, Canada
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This ring looks exactly like an internal reflection of a bright off-axis star. If the full plate could be seen, the star causing this (gamma Cyg, perhaps?) would be located pretty much exactly an equal distance from, and opposite the optical axis.
This is a common fault of Schmidt cameras. The cause: a bright star's image is focused on the photographic plate. The light from this bright spot is collimated by the primary, the (almost) parallel bundle then being reflected up to the Schmidt corrector plate, some of which is thence sent back down to the primary and imaged on the opposite of the plate. The ring shape is most likely the result of the strong spherical aberration introduced by the primary after *two* reflections.
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reiner
super member
Reged: 09/28/05
Posts: 100
Loc: Freiburg, Germany
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Glenn,
the object is on POSS plates with different pointing (POSS I and POSS II) and it is also there on photographs taken with other telescopes that do not produce the Schmidt ghosts.
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Reiner
22" and 14" Dobs on EQ platforms
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Glenn, you should give a look at the link I posted higher :
http://www.lostvalleyobservatory.com/review.nebula1/
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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GlennLeDrew
Pooh-Bah
Reged: 06/18/08
Posts: 1283
Loc: Ottawa, Ontario, Canada
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Ahhh.. In my haste I'd assumed the full frame image linked to in the first post above was a digitized POSS frame. That's why I went on with all that blather about Schmidt ghosts. It sure looks similar in form. I checked out the web page outlining the "detective" work undertaken on this. Well done!
This object is simply astonishing! Even the most perfectly symmetrical Abell planetaries don't possess this kind of hard, geometric precision. The sharpness of both the outer and inner edges of the annulus, and the evenness of illumination boggles my mind. I just can't imagine any natural phenomenon that could take on this form.
Just to be really certain that it's truly not an artifact, have one or more follow up images been taken, with at least a slightly different telescope pointing?
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Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Home-made Mk II RA bino, using interchangeable objectives and eyepieces
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Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.
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Out of Focus
sage
Reged: 09/23/07
Posts: 232
Loc: Roseville (Sac) CA
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It seems to be some kind of giant force field.
Seriously, it MUST be a photographic artifact. I agree with GlennLeDrew "This object is simply astonishing! Even the most perfectly symmetrical Abell planetaries don't possess this kind of hard, geometric precision. The sharpness of both the outer and inner edges of the annulus, and the evenness of illumination boggles my mind. I just can't imagine any natural phenomenon that could take on this form.
"
BTW the photo with the green coloring is now my desktop background. 
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Orion XT10i w/FT
Orion XT6
Orion Mini Giant 15X63
Orion ST80-A
24mmHyperion,13mmEthos,
9mmNagler
AO series 160 &
L10 Microscopes
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Blue Canyon, Placer Co. CA
 
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Between differents sources, we have now seen this one on 8 to 10 different pictures, taken by different operators and different gears.
I'm sure the artefact can now be eliminate.
Observing yesterday with my 14" I easily spotted the triangle of star marking the centre of the annealled structure but nothing to see with OIII or uhcs.
The size is relatively consequent.
Perahps/certainly a challenge for the 24" or more, with the good filter
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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tatarjj
Pooh-Bah
Reged: 04/20/04
Posts: 1134
Loc: Austin, TX
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Quote:
It seems to be some kind of giant force field.
Seriously, it MUST be a photographic artifact. I agree with GlennLeDrew "This object is simply astonishing! Even the most perfectly symmetrical Abell planetaries don't possess this kind of hard, geometric precision. The sharpness of both the outer and inner edges of the annulus, and the evenness of illumination boggles my mind. I just can't imagine any natural phenomenon that could take on this form.
"
BTW the photo with the green coloring is now my desktop background.
Nope, this is a real object. I just loaded the POSS plates myself and it's there. It's a real object, and quite possibly a brand new discovery. This is an amazingly symetrical object, but if you look at the images, you'll see it's not perfect, and if it is more symetrical than Abell 39, then it's not by much. If this object is not a planetary nebula, I'll eat my telescope.
You guys need to contact the professionals if you cannot find a designation for it. I can't find one after checking SIMBAD or Megastar.
Here is a 10'x10' POSSII Red image I heavily enhanced in ImageJ.
It looks like this probable PN is about 3'-4' across- pretty darn big! I had to heavily compress this into an especially compressed .jpeg to get it under 100kb though 
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John T.
Austin, TX
25" f/4.2 Dob
18" Obsession #701
4" Stellar Vue Achromat
8X56 Binos
Edited by tatarjj (09/04/08 06:14 PM)
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OldDeadOne
Pooh-Bah
Reged: 09/09/06
Posts: 1143
Loc: West Virginia
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If you will note that you can see another circle underneath the first one,makes me wonder if it's indeed artificial.
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Bert O'Dell
PROUD GOTO USER
LX200 10" Classic
various meade plossi's eyepieces
Konig MX70 40mm" eyepiece
11mm T6
7mm T1
Insane under a full moon
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Charleston WV clearsky
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tatarjj
Pooh-Bah
Reged: 04/20/04
Posts: 1134
Loc: Austin, TX
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Quote:
If you will note that you can see another circle underneath the first one,makes me wonder if it's indeed artificial.
I don't see another circle underneath the first..
Maybe you didn't read all the posts previous to this, because you're saying that the exact same defect has appeared in multiple different deep images, taken by different telescopes, using different methods on different dates. Don't you realize that for all practical purposes this is impossible? This object may or may not have been discovered before, but one thing that is beyond a doubt is that it is real.
BTW, the reason I keep saying this must be a planetary nebula is I have never seen a Wolf Rayet bubble that looks anywhere remotely as symetrical as this. However, many planetary nebulae display good symmetry, and while this object is more symmetrical than most, it is not exceptionally so. The only other thing I can think of that could create such symmetry would be a light echo. However, this object is NOT a light echo, since it hasn't changed size between the POSSII images and now.
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John T.
Austin, TX
25" f/4.2 Dob
18" Obsession #701
4" Stellar Vue Achromat
8X56 Binos
Edited by tatarjj (09/04/08 07:17 PM)
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Out of Focus
sage
Reged: 09/23/07
Posts: 232
Loc: Roseville (Sac) CA
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Then it is settled, it is HEAVEN.
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Orion XT10i w/FT
Orion XT6
Orion Mini Giant 15X63
Orion ST80-A
24mmHyperion,13mmEthos,
9mmNagler
AO series 160 &
L10 Microscopes
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Blue Canyon, Placer Co. CA
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Dana Patchick
newbie
Reged: 09/05/08
Posts: 2
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Hi Folks,
I'm new to 'Cloudy Nights', and I thank Steve Gottlieb for bringing attention to this thread over to the 'Deepskyhunters', a forum on Yahoo that a number of you are familiar with.
There can be little doubt that this is a overlooked planetary nebula - of the older Abell type.
Several of us over at Deepskyhunters searched diligently for such things a few years ago, when there was a window of opportunity to discover them. This is certainly one 'that got away'. How we all missed it is a mystery. To my eye, it shows well enough even on the original POSS red plate from the 1950's.
This was before the Northern leg of the IPHAS survey ( http://www.iphas.org/) would soon make such amateur finds at this galactic latitude a thing of the past.
Their survey has probably picked up this wonderful object by now, even though it isn't listed in SIMBAD yet.
I went to their web site earlier today, hoping to find some possible info on this object there, but I had no luck. Perhaps somebody a little more savvy at navigating through the labyrinth might come up with an I.D.assigned to it by now.
Using Bill Ferris' positional estimate of the center, it didn't take too long to ferret out a decent central star candidate. I put this ~17th magnitude star at about 20 15 21.5 +38 02 43 (J2000). I used 2MASS to obtain these coordinates. They are not exact, but pretty close.
If one 'blinks' a DSS blue, red, and infrared plate, this star leaps out as the likely source, in my opinion.
Best regards,
Dana Patchick
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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On this picture in skymap
we can see candidates for a central star.
There is also a very faint blue star which is not referenced in usno2.
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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Richard Crisp
newbie
Reged: 11/12/07
Posts: 2
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here's that recently discovered "Bubble Nebula" near the Crescent Nebula in Cygnus
http://www.narrowbandimaging.com/cbubble_mk1sn2_f12_pl9k_baader_ha_page.htm
I imaged it last night using the 18" classical cass at 5760mm (f/12.6, native focal ratio)
I used the Proline 9000 camera and Baader Halpha
It is 3 hours 20 minutes total exposure. It is not a very bright object which figures since it was only noted very recently
I also re-processed my 2004 image to see if I could see it there. It is in fact in it but not so easy to see. At least we know this is an object that has been observable for some time:
www.narrowbandimaging.com/images/cbubble_2004_image_crisp.jpg
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Thank's Richard for this brand new view.
On the french forum, somebody identified the blue star near center of the ring as (it seems the same as Dana from ccordinates) :
B1.0 ID: 1280-0488001
infos from Guide software :
USNO B1.0 star
B1.0 ID: 1280-0488001
RA: 20h15m21.47s +/- 133 milliarcseconds
declination: +38 02' 44.2" +/- 0 milliarcseconds
Epoch: 1971.1
Proper motion in RA: 0 +/- 0 milliarcseconds/year
Proper motion in dec: 0 +/- 0 milliarcseconds/year
muPM: 0
fitRA: 1
fitDec: 0
nDet: 2
Flags: ...
Photometry:
!Band mag Cal Survey Emulsi field S/G xi eta
B1: 18.12 2 POSS-I 103a-O 284 0 -0.14 -0.01
B2: 18.50 1 POSS-II IIIa-J 340 3 0.13 0.00
!
"Cal" = calibration: 0 means calibrated via bright standard stars on
the plate; 1 = via faint standards on the plate; 2 = faint standards on
adjacent plate; 3 = faint standards two plates away, etc.
"S/G" = star/galaxy index. 11=object looked starlike, to 0=fuzzy/galaxy-like.
xi, eta = displacement of the star's position on this plate, in
arcseconds, relative to the mean solution.
This USNO-B1.0 data was downloaded from a VizieR server. Downloaded
data accumulates; you can click here to delete the accumulated data.
(You can always reload the data later, if desired.)
IMAGE : 2MASS ALADIN SDSS//xhttp://cas.sdss.org/dr5/en/tools/explore/obj.asp?ra=303.83946&dec=+
38.04561
DATA : SIMBAD VizieR
NVO GALEX
NED SDSS
among the data downloaded from SDSS website, you can reach V (visual magnitude)
and B-V color index using the formulae:
V = r' + [0.44 * (g' - r')] - 0.02, good about +/- 0.05V
B-V = 1.04(g' - r') + 0.19, good to about 0.1 B-V.
(for B, R, and I magnitudes see Photometric bands)
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Here is the webpage of the french astronomer Fred Guinepain who put the "heads up" on this one in france :
http://www.astrosurf.com/fguinepain/NewBubble/NewBubble.htm
You'll can see on this page the animation from blue, red and IR plates showing the blue star mentionned above :
http://www.astrosurf.com/fguinepain/NewBubble/IdentificationEtoileCentraleHDRecadre.gif
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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Tiamat
journeyman
Reged: 02/02/06
Posts: 5
Loc: Poland, Cracow
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Hello from Poland,
I am rather newbie on this Forum, except a few comet animations two years ago.
Two days ago I made 13 expositions in H-alpha centered on this "Clock glass nebula". Each exposition was 3600 seconds. So after 13 hours after moderate processing this object is easy visible even on my picture taken from suburban area in Cracow.
Here is link to crop of the image:
http://www.starrysite.com/index.php?m=Galleries&a=ShowGalleryImage&gc_id=11&gi_id=531
Here to full frame.
http://www.starrysite.com/index.php?m=Galleries&a=ShowGalleryImage&gc_id=11&gi_id=530
Obtained with STL11000M, Paramount ME and Ritchey-Chretien 12.5" A&M 320IMST
Best Regards
Michal Zolnowski - Tiamat
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Weather above my Solaris Observatory:
http://www.iryda.pl/desktop/strona.htm
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Hello Michal,
Another nice picture of this area(and nice setup).
The "clock glass nebula" suits perfectly to this one
Thanks.
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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BillFerris
Carpal Tunnel
Reged: 07/17/04
Posts: 2910
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I heard back from Dave Riddle, over the weekend. After satisfying any initial questions he had that this is a real object and after searching the likely databases, he's also arrived at the conclusion that this is probably a new discovery. In my reply to Dave, I provided him a link to Fred Guinepain's web site.
On a side note, this episode illustrates just how far technology has progressed in the last 50 years. The Palomar Observatory Sky Survey (POSS or POSS I) was completed in 1958. The 48-inch Samuel Oschin Schmidt telescope and glass photographic plates bathed in a Kodak emulsion were the technological tools employed in the creation of that survey. With the CCD technology available to everyday consumers, today's amateur astronomers are able to go far deeper than POSS. And while the 2MASS and SDSS projects will go even deeper, many professional surveys target the discovery of NEA's, KBO's and more "exotic" objects than garden variety emission nebulae. In other words, this object should serve as a reminder that there is much more to be found in the deep sky and that amateurs still have an opportunity to play a vital role in that pursuit.
Bill in Flag
--------------------
Grand Canyon Adventure
Lowering the Threshold
18" Obsession
4.5" Meade 4500
10x50 Swift Audubon
Cosmic Voyage
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Dave Jurasevich
newbie
Reged: 09/09/08
Posts: 1
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Hi,
I thought I'd pop into this forum and introduce myself. I'm Dave Jurasevich, the guy who imaged this bubble back in July and filed a discovery report to the IAU.
For anyone interested in the sequence of events leading up to this, here's the short of it.
I imaged it back on 06 July 2008 from the Mount Wilson Observatory using my AP 160 EDF as part of an 8-pane mosaic of the IC 1318 area in Cygnus. This particular frame was a foru hour exposure (12 x 1200 sec) using a STL-11000M camera. I processed the image the following day and upon close examination found this "bubble" buried in a faint
gas cloud. It was such a curious object I decided to research it to see if was previously noted and cataloged. To my surprise I could not find any trace of it in the professional databases, so I sent off a formal "discovery" report to the IAU on 10 July 2008. It was subsequently posted on my website on 18 July 2008. I think I posted
it on the AP Scopes forum about a week or so later. Anyway, I have been in correspondence with the IAU about this object; they have a lot of questions! It turns out I heard about the SSRO "discovery" of this object two days ago and e-mailed them about it. I got a quick reply from Keith Quattrochhi and Mel Helm, the two amateurs who
independently imaged this object on 17 July 2008 and later posted it on their website. They are a great pair of guys and we've had a very cordial and upbeat communication between us in the past two days. Of course my "discovery" image is but a mere H-alpha monochrome compared to their spectacular narrowband false-color image. Anyway, that's about the size of it and now I'm just waiting to see
what the IAU decides on this elusive object.
BTW, I didn't image this object in conjunction with my job as Superintendent of the Mount Wilson Obseratory or use any of the large refractors. I did it in my spare time as just another amateur astronomer one evening using one of Roland Christian's masterpiece 160 EDF.
Best Regards,
Dave Jurasevich
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Out of Focus
sage
Reged: 09/23/07
Posts: 232
Loc: Roseville (Sac) CA
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so what is the speculation on the nature of this object?
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Orion XT10i w/FT
Orion XT6
Orion Mini Giant 15X63
Orion ST80-A
24mmHyperion,13mmEthos,
9mmNagler
AO series 160 &
L10 Microscopes
--------------------
Blue Canyon, Placer Co. CA
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ZielkeNightsky
sage
Reged: 10/01/06
Posts: 378
Loc: Denmark
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Wow - what a thread.
The word is spreading fast.
I fellow member, Jesper Sørensen, of our Danish Astro forum, just re-processed his photo of NGC 6888, taken the 17 and 30 aug. this year.
And sure its there very very clear.
Bubble near NGC 6888
Bottom to the right.
Edited by ZielkeNightsky (09/09/08 06:45 PM)
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Tiamat
journeyman
Reged: 02/02/06
Posts: 5
Loc: Poland, Cracow
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Hello,
Thank you very much Denis.
Off course huge Congratulation for Discoverer of "Clock glass nebula" !!!
Best Regards
Michal Zolnowski
--------------------
Weather above my Solaris Observatory:
http://www.iryda.pl/desktop/strona.htm
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Yes, discoverers merit congratulations for observation and analisys of their pictures.
Funny thing to see this one is present in the sky for long time and is discovered by three separate parties in less than two months.
Seasonal caracter of the objet and rapid evolution of astrophotography technics (generalisation of H alpha and other filtering practices) among amateurs could there be a determinant factor ?
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
Edited by Denis (09/10/08 08:43 AM)
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Gilfester
super member
Reged: 11/06/05
Posts: 190
Loc: Long Island, NY
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A fascinating discovery! Is there any information as to the object's distance? Is it within the Veil or much closer to earth?
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May your night skies be steady, clear and dark.
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Bill Weir
Pooh-Bah
Reged: 06/01/04
Posts: 1299
Loc: Metchosin (Victoria), Canada
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Quote:
Funny thing to see this one is present in the sky for long time and is discovered by three separate parties in less than two months.
Seasonal caracter of the objet and rapid evolution of astrophotography technics (generalisation of H alpha and other filtering practices) among amateurs could there be a determinant factor ?
I think that's exactly it. With the ever increasing quality of equipment and the almost fanatical veal of many imagers I'm sure more and more amature discoveries are in the future.
Bill
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6'' Orion SkyQuest
12.5'' f/5 Custom Truss Dob
William Optics 80mm ZenithStar ED II
f/5 25" newtonian on a giant GEM, any time I want
Observing sessions grand total for 2008, 121.
So far in 2009, 92
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Tiamat
journeyman
Reged: 02/02/06
Posts: 5
Loc: Poland, Cracow
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I am interested in how many Astrophotographers is reprocessing now their old, old, old images searching for new very faint objects like this .
Maybe in following months we will have "new discoveries" in very surpirising and obvious "clear" areas like this was.
Best Regards
Michal Zolnowski
PS Excuse me for me English
Edited by Tiamat (09/11/08 03:56 AM)
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Some star hopping in the area ? :
http://www.reto.fr/cartes/imagepages/image15.html and three following pages
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
Edited by Denis (09/15/08 04:00 PM)
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Phil Jones
sage
Reged: 11/21/05
Posts: 371
Loc: TX
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After showing my widefield image of this area to a friend, he sent me this thread. I used a FSQ for my image, so resolution isn't too good for detecting this bubble, but I found it.
widefield image in Ha
I cranked up the contrast to get a better view of the bubble:
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http://www.visualuniverse.org
VisualUniverse Blog
Edited by Phil Jones (09/17/08 05:08 PM)
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Mallart
newbie
Reged: 10/01/08
Posts: 2
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Hello,
I am a new member of this forum, sot let me present myself in a few lines. My name is Emmanuel Mallart, 46years old, I am a French astrophotographer, also involved in high precision scopes (Newton, Newton-Cassegrain, ...) and high precision mounts making.
You can see the equipement there, sorry th site is not yet translated in English : http://www.axisinstruments.com
Direct access to the mounts page :
http://www.axisinstruments.com/francais/produits/montures/montures-equatoriales.htm
For my pictures : http://www.astrophoto-mallart.com/francais/galerie/nouvelles/galerie_nouvelles.htm
I shooted this picture of NGC6888 region, were you can see easily the new bubble. It was captured last week-end using my homemade 16inch NewtonCassegrain used at Newton f:4 focus, and astrooptik 3" corrector and the STL11k + 6nm astrodon Ha filter. The global exposure is three hours.
You can see it on the French Astrosurf forum :
http://www.astrosurf.com/ubb/Forum3/HTML/019963.html
I hope you will enjoy !
Emmanuel
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Mallart
newbie
Reged: 10/01/08
Posts: 2
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Sorry, my scope is not a 16" but a 12" Newton-Cassegrain.
I will post a picture of the setup soon.
Regards,
Emmanuel
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Hello Emmanuel, I was coming to put a link for your picture, but the work is done
Splendid view of this area 
Denis
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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obrazell
member
Reged: 04/03/05
Posts: 56
Loc: United Kingdom
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Just for update interest this object does show on the IPHAS survey but not yet in the publicly released bit. They said it was quite faint for them and only appeared on their highest quality images. As to be expexted it will appear in the PN catalogue form this survey when ever that comes out.
Owen
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Mr. Bill
Post Laureate
Reged: 02/09/05
Posts: 3149
Loc: Just passing through.....
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I take it I won't be sweeping this up with my BT100 binoculars? 
OTOH, I see a lot of the associated bright nebulosity around 6888; sometimes under REALLY dark skies it is hard to separate out 6888 from the surrounding field.
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10x50 Fujinon binos + 16x70 Fujinon binos + UA UniMount
Oberwerk BT100 45 degree +24mm Pans + Hercules fork mount
120mm f/5 Orion achromat + Moonlite focuser
130mm TMB 130SS f/7 APO refractor
140mm f/5.7 Vixen NeoAchro Petzvel refractor
150mm f/8 homemade achromat
8 inch newt with f/5 Swayze mirror
10 inch f/4.7 Orion newt + Paracorr
15 inch f/5 Discovery "Galactic Cannon"
Member IDA
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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Thanks for the update, Owen.
Mr Bill adding the diameters of all your instruments should (perhaps) make it...
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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And by the way, do some very big dobson owner try to give a look at this nebula ?
In France, a forummate try from under a very good sky with a 22" and see nothing.
--------------------
Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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Bill Weir
Pooh-Bah
Reged: 06/01/04
Posts: 1299
Loc: Metchosin (Victoria), Canada
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Quote:
And by the way, do some very big dobson owner try to give a look at this nebula ?
In France, a forummate try from under a very good sky with a 22" and see nothing.
Perhaps you could try getting in touch with Jimi Lowrey in Fort Davis and he could have a go at it with Barbarella.
http://www.astronomytechnologytoday.com/samplecontent.asp?doc=285
Bill
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6'' Orion SkyQuest
12.5'' f/5 Custom Truss Dob
William Optics 80mm ZenithStar ED II
f/5 25" newtonian on a giant GEM, any time I want
Observing sessions grand total for 2008, 121.
So far in 2009, 92
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reiner
super member
Reged: 09/28/05
Posts: 100
Loc: Freiburg, Germany
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Hi Denis,
I had tried it shortly after you posted the new PN here using my 22", but without success. The contrast of the bubble to the "background" nebulosity is very small.
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Reiner
22" and 14" Dobs on EQ platforms
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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The APOD today :
http://antwrp.gsfc.nasa.gov/apod/ap081113.html
Thanks Reiner for the report, and Bill for the suggestion. I'll try to contact Jimi Lowrey.
--------------------
Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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GlennLeDrew
Pooh-Bah
Reged: 06/18/08
Posts: 1283
Loc: Ottawa, Ontario, Canada
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I'll chime in on the possible visibility of this ring... forget it! The excessively low surface brightness, combined with the *very* small ring width, will render this one invisible to the human eye with any instrument/filter conceivable. After all, just look at the high degree of processing required just to make it barely visible in DEEP images.
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Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Home-made Mk II RA bino, using interchangeable objectives and eyepieces
My Gallery
Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.
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Starman1
Vendor - Scope City
Reged: 06/24/03
Posts: 12227
Loc: Los Angeles
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Quote:
Hi Denis,
I had tried it shortly after you posted the new PN here using my 22", but without success. The contrast of the bubble to the "background" nebulosity is very small.
I, too, see a second bubble in this APOD picture. It is over 1/3 the diameter of the newly discovered bubble, and in the APOD image it is immediately to the larger bubble's left, and overlaps the larger bubble by a little over 1/3 its diameter. I see it also in the contrast-enhanced image posted earlier by John T.
I believe this second bubble might be created by some chance curves of faint stars that seem to outline a circular area. But I would like to see the image contrast-enhanced a bit more. We could be looking at two new "bubble" planetaries.
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Don Pensack
12.5" Truss Dob, 5" Maksutov, Fujinon Binos
Sustaining Lifetime IDA member
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Denis
sage
Reged: 12/24/05
Posts: 243
Loc: Rennes, France
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They are many nebulosities in this sector and also many star and chain star.
I don't see other evidence of another bubble.
I think the best image we have to work on this area is the one of Keith Quattrocchi and Mel Helm which make the Apod.
You can try to enhance the large version of this one to search more precisely : http://antwrp.gsfc.nasa.gov/apod/image/0811/UndesignatedBubbleFC_kbqmh2546.jpg
--------------------
Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" and 14" dobsonian
Nikon photogear.
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