robinsondd
sage
Reged: 05/28/07
Posts: 321
Loc: St. Mary's City, MD
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Hi all,
I'm really interested in Ring galaxies. A google search said that NGC 3685 Helix nebula is a Polar Ring galaxy. APOD has a picture of dual ring galaxies (Arp 147) that is 15 mag. Has anyone out there been able to see a ring galaxy through their equipment? Have a list?
Thanks...
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David Robinson
Lexington Park, MD
----
"Why should we be in such a desperate haste to succeed and in such desperate enterprises? If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." Thoreau 1817-1862
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Achernar
Postmaster
Reged: 02/25/06
Posts: 5025
Loc: Mobile, Alabama, USA
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I've seen the NGC-2681, which is a polar ring galaxy, but the ring was not visible through my 10-inch, just the main body of the galaxy. As for a pure ring galaxy, the Cartwheel galaxy in Sculptor is the nearest known example at 500 million light years away, making it accessible if you have a large Dob.
Taras
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15-inch F/4.5 Dob under construction
10-inch F/4.5 Discovery Dob
6-inch F/8 Homebuilt Dob
4 1/4-inch F/4 Homebuilt reflector
A whole bunch of eyepieces, filters and other accessories....
Two curious cats
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David Knisely
Postmaster
Reged: 04/19/04
Posts: 8279
Loc: Beatrice, Nebraska
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Quote:
Hi all,
I'm really interested in Ring galaxies. A google search said that NGC 3685 Helix nebula is a Polar Ring galaxy. APOD has a picture of dual ring galaxies (Arp 147) that is 15 mag. Has anyone out there been able to see a ring galaxy through their equipment? Have a list?
Thanks...
Well, I have seen a few spiral galaxies which had faint ring-like outer spiral arm segments, but I have seen none of the distant arc-like 'ring' galaxies which have little if any core (the Arp 147 kind). M77 has a nearly circular faint outer ring which I have glimpsed in my 9.25" SCT (see Rick Johnson's M77 image below). The "Polar Ring" galaxies have a bit different appearance with a central galaxy seemingly surrounded by a ring-like segment at nearly a right-angle to the axis of the central galaxy. As for NGC 3685, there is some discrepancy here. The revised NGC (1973) indicates that it apparently does not exist, while the NGC/IC Project page indicates that it is one of a pair of very faint galaxies in Leo (possible positional error). You might be referring to NGC 2685 which is often classified as a polar ring galaxy. It isn't the "Helix Nebula", as that is the large planetary NGC 7293 in Aquarius. Clear skies to you.
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David W. Knisely
Hyde Memorial Observatory
http://www.hydeobservatory.info
Prairie Astronomy Club
http://www.prairieastronomyclub.org
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Hrundi
Pooh-Bah
Reged: 02/06/08
Posts: 1237
Loc: Estonia
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I wonder what sort of an instrument would be required to see the ring of hoag's object.
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robinsondd
sage
Reged: 05/28/07
Posts: 321
Loc: St. Mary's City, MD
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Quote:
... As for NGC 3685, there is some discrepancy here. The revised NGC (1973) indicates that it apparently does not exist, while the NGC/IC Project page indicates that it is one of a pair of very faint galaxies in Leo (possible positional error). You might be referring to NGC 2685 which is often classified as a polar ring galaxy. It isn't the "Helix Nebula", as that is the large planetary NGC 7293 in Aquarius. Clear skies to you.
David,
You are right, I meant to refer to NGC 2685 (not NGC 3685 as I posted) and as the Helix galaxy, not the Helix nebula. Doh! Thanks for responding and getting it straight for me.
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David Robinson
Lexington Park, MD
----
"Why should we be in such a desperate haste to succeed and in such desperate enterprises? If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." Thoreau 1817-1862
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Bill Weir
Pooh-Bah
Reged: 06/01/04
Posts: 1297
Loc: Metchosin (Victoria), Canada
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You mean something like Hoag's Object, David?
http://en.wikipedia.org/wiki/Hoag's_Object
It was on my object list for the 25" last year, but weather conditions never were ageeable when I was out at the observatory. Give it a shot next time you are at Cherry Springs or at the Almost Heaven party.
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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sgottlieb
sage
Reged: 07/22/07
Posts: 339
Loc: SF Bay area
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Quote:
You mean something like Hoag's Object, David?
http://en.wikipedia.org/wiki/Hoag's_Object
It was on my object list for the 25" last year, but weather conditions never were ageeable when I was out at the observatory. Give it a shot next time you are at Cherry Springs or at the Almost Heaven party.
Bill
Here's an observation of Hoag's (Ring) Object with my 18-inch from last summer's Golden State Star Party in early July, '08. No sign of outer ring, though just viewing the core itself wasn't easy.
At 280x this ring galaxy appeared extremely faint, very small, round, 20" diameter, low even surface brightness. Visible roughly 1/4 to 1/3 of the time with averted vision and could hold only a few seconds at a time. Viewed the core only with no indication of the fainter outer ring. Situated just east of the midpoint of a 8' line connecting two mag 10 and 11 stars oriented SE to NW. Several fainter stars are grouped to the south of the mag 11 star.
--------------------
Steve Gottlieb
18" f/4.3 Starmaster
Adventures In Deep Space
7500+ NGC/IC Visual Descriptions
NGC/IC Project
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uwe_glahn
member
Reged: 03/05/06
Posts: 44
Loc: germany
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Hi David,
yes, could see the polar ring with 24inch aperture. The polar ring is not difficult to see, but only on the NW side of the galaxy. The sky was very good, NELM around 6m7. See also my drawing http://www.deepsky-visuell.de/Zeichnungen/NGC2685.htm
PGC 54559 aka Hoags Object is much more difficult. Under very transparent alpine sky I could see the the very faint glow of the ring around the faint stellar core with my 16inch. No sign of the real ring structure, maybe with 30inch+. The sketch http://www.deepsky-visuell.de/Zeichnungen/PGC54559.htm
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clear skies, Uwe
www.deepsky-visuell.de
www.ArpGalaxies.com
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AlanK
professor emeritus
Reged: 01/26/07
Posts: 512
Loc: Auckland, New Zealand
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Here are a few more:
Ngc 985 V mag = 13.4 RA 02h 34.6 Dec -08 47
Ngc 1143/4 (Arp 118) V mag 13.3 RA 02h 55.2 Dec -0 11
IC 298 (Arp 147) B mag = 15.8 RA 03h 11.3 Dec +01 19
UGC 3730 (Arp 141) V mag = 13.3 RA 07h 14.3 Dec +73 29
Ngc 2444/5 (Arp 143) V mag = 13.0 RA 07h 46.9 Dec +39 01
Ngc 2936/7 (Arp 142) V mag = 13.1 RA 09h 37.7 Dec +02 44
Ngc 4774 V mag =14.3, RA 12h 53.2 Dec +36 49
IC 298 & 298A look like a faint number '10' on photos but were much less impressive when I looked showing as a single faint spot through the 18".
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Clear skies!
18 inch f4.5 Obsession #1637
12 inch f5.4 reflector
Just another frozen astronomer
Kumeu Observatory
Auckland NZ
7,276 deep sky objects incl 4,670 ngcs
Who dares - observes!
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Alvin Huey
Carpal Tunnel
Reged: 10/18/05
Posts: 1831
Loc: NorCal
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Quote:
Quote:
You mean something like Hoag's Object, David?
http://en.wikipedia.org/wiki/Hoag's_Object
It was on my object list for the 25" last year, but weather conditions never were ageeable when I was out at the observatory. Give it a shot next time you are at Cherry Springs or at the Almost Heaven party.
Bill
Here's an observation of Hoag's (Ring) Object with my 18-inch from last summer's Golden State Star Party in early July, '08. No sign of outer ring, though just viewing the core itself wasn't easy.
At 280x this ring galaxy appeared extremely faint, very small, round, 20" diameter, low even surface brightness. Visible roughly 1/4 to 1/3 of the time with averted vision and could hold only a few seconds at a time. Viewed the core only with no indication of the fainter outer ring. Situated just east of the midpoint of a 8' line connecting two mag 10 and 11 stars oriented SE to NW. Several fainter stars are grouped to the south of the mag 11 star.
I was with Steve at GSSP and observed it through his 18" and my 30". We could not discern the ring structure even in the 30".
I do recall reading an observing report from a few folks from Texas Star Party that Bob(?) Christanson, Larry Mitchell and maybe Faith Jordan observing the ring of Hoag's object during last years star party. They used a 25" and 36" reflectors. Perhaps Faith can chime in.
Another faint ring I observed was Arp 147. I was shocked that I actually saw a brightening on one side. I'll post my notes when i get home tonight. Another observe confirmed my view so I know that I wasn't imagining things, which I thought I was. It was very transparent and steady that night.
--------------------
Clear Skies,
Alvin #26
22" f/4.0 reflector and 30" f/4.3 StarMaster
FaintFuzzies | TAC | TAC-Sac
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robinsondd
sage
Reged: 05/28/07
Posts: 321
Loc: St. Mary's City, MD
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Quote:
You mean something like Hoag's Object, David?
Bill,
That is what I had in mine. Thanks for the list Alan and all the input folks, it is appreciated. I am definately going to shoot for a ring galaxy next time I get to a star party that is very dark.
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David Robinson
Lexington Park, MD
----
"Why should we be in such a desperate haste to succeed and in such desperate enterprises? If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." Thoreau 1817-1862
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robinsondd
sage
Reged: 05/28/07
Posts: 321
Loc: St. Mary's City, MD
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Quote:
Here's an observation of Hoag's (Ring) Object with my 18-inch from last summer's Golden State Star Party in early July, '08. No sign of outer ring, though just viewing the core itself wasn't easy.
At 280x this ring galaxy appeared extremely faint, very small, round, 20" diameter, low even surface brightness. Visible roughly 1/4 to 1/3 of the time with averted vision and could hold only a few seconds at a time. Viewed the core only with no indication of the fainter outer ring. Situated just east of the midpoint of a 8' line connecting two mag 10 and 11 stars oriented SE to NW. Several fainter stars are grouped to the south of the mag 11 star.
Steve,
Checked out your signature, man that is a lot of recorded objects!
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David Robinson
Lexington Park, MD
----
"Why should we be in such a desperate haste to succeed and in such desperate enterprises? If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." Thoreau 1817-1862
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astronron
member
Reged: 04/27/08
Posts: 44
Loc: Queensland Australia
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For observers who can see the far Southern constellation of VOLANS can observe the Southern Ring Galaxy (ESO 34-IG11
RA 06:43.1 DEC-74.14.Mag 12.5.
With accompanying galaxies PGC 19454 and 19455 are a good target for scopes of 12" or larger.
In my 16" at 305x mag the ring and the companions are plainly seen.
The galaxy nucleus which is off center is quite star like and the south west rim is a little brighter.
While in the area check out NGC 2442 and companion galaxies.
Ron
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Ron
16"Truss Newtonian
8" Celestron SCT
15x65 Binoculars
Roll off roof observatory
2 acre dark site
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zizzapnia
super member
Reged: 05/15/06
Posts: 129
Loc: Virginia
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Here are some ring or ring-like galaxies from my website (SDSS images). These are all 13.5' x 10' (roughly a high power view) which should give you an idea of the scale. Sorry I haven't gotten most of them their own proper pages with data- still working on that. Most if not all are visible in medium scopes, but seeing the rings is another story...
NGC 6028
NGC 3821
NGC 1211
UGC 12040
NGC 2685 (Helix-polar ring)
Hoag's Object
UGC 9562 (polar ring)
NGC 2859
IC 676
IC 791
NGC 7428
UGC 10168
UGC 5055 (ring-like, but really a spiral)
UGC 4414
UGC 4596
UGC 4599 (very faint ring)
UGC 1775 (ARP 10)
UGC 3904
NGC 985 (Seyfert)
IC 5285
UGC 8740
UGC 6614
UGC 6332
UGC 6334
UGC 5936
UGC 5984 (ARP 107) - busted ring
Lots more, I'm sure.
Edited by zizzapnia (02/03/09 07:46 PM)
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AlanK
professor emeritus
Reged: 01/26/07
Posts: 512
Loc: Auckland, New Zealand
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Another nice deep southern ring galaxy (also known as the toadstool) is ESO 138-29 Mag 12.9 in Ara - RA 17h 29m 10.0 Dec -62 26 42.9 which forms a close pair with the fainter mag 15.5 ESO 138-30. Have seen in the 12 but must retry with the 18" too see if ring is visible.
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Clear skies!
18 inch f4.5 Obsession #1637
12 inch f5.4 reflector
Just another frozen astronomer
Kumeu Observatory
Auckland NZ
7,276 deep sky objects incl 4,670 ngcs
Who dares - observes!
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astronron
member
Reged: 04/27/08
Posts: 44
Loc: Queensland Australia
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I clicked on the NGC numbers and when the website came up it said that the page I requested could not be shown 
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Ron
16"Truss Newtonian
8" Celestron SCT
15x65 Binoculars
Roll off roof observatory
2 acre dark site
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bicparker
Carpal Tunnel
Reged: 02/07/05
Posts: 1706
Loc: Plano, TX
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Quote:
I was with Steve at GSSP and observed it through his 18" and my 30". We could not discern the ring structure even in the 30".
I do recall reading an observing report from a few folks from Texas Star Party that Bob(?) Christanson, Larry Mitchell and maybe Faith Jordan observing the ring of Hoag's object during last years star party. They used a 25" and 36" reflectors. Perhaps Faith can chime in.
Another faint ring I observed was Arp 147. I was shocked that I actually saw a brightening on one side. I'll post my notes when i get home tonight. Another observe confirmed my view so I know that I wasn't imagining things, which I thought I was. It was very transparent and steady that night.
My notes from The Yard Scope (36" f/5) at TSP last year read that we could not see the ring.
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Bic Parker
17.5" f/5 dob
10" f/10 SCT
5" f/8 refractor
80mm f/6 refractor
66mm f/6 refractor
Plus a few others out of the rotation
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Alvin Huey
Carpal Tunnel
Reged: 10/18/05
Posts: 1831
Loc: NorCal
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Quote:
Quote:
I was with Steve at GSSP and observed it through his 18" and my 30". We could not discern the ring structure even in the 30".
I do recall reading an observing report from a few folks from Texas Star Party that Bob(?) Christanson, Larry Mitchell and maybe Faith Jordan observing the ring of Hoag's object during last years star party. They used a 25" and 36" reflectors. Perhaps Faith can chime in.
Another faint ring I observed was Arp 147. I was shocked that I actually saw a brightening on one side. I'll post my notes when i get home tonight. Another observe confirmed my view so I know that I wasn't imagining things, which I thought I was. It was very transparent and steady that night.
My notes from The Yard Scope (36" f/5) at TSP last year read that we could not see the ring.
Bic,
Are you refering to Hoag's object or Arp 147?
Thanks!
--------------------
Clear Skies,
Alvin #26
22" f/4.0 reflector and 30" f/4.3 StarMaster
FaintFuzzies | TAC | TAC-Sac
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Bill Weir
Pooh-Bah
Reged: 06/01/04
Posts: 1297
Loc: Metchosin (Victoria), Canada
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Quote:
Quote:
Quote:
I was with Steve at GSSP and observed it through his 18" and my 30". We could not discern the ring structure even in the 30".
I do recall reading an observing report from a few folks from Texas Star Party that Bob(?) Christanson, Larry Mitchell and maybe Faith Jordan observing the ring of Hoag's object during last years star party. They used a 25" and 36" reflectors. Perhaps Faith can chime in.
Another faint ring I observed was Arp 147. I was shocked that I actually saw a brightening on one side. I'll post my notes when i get home tonight. Another observe confirmed my view so I know that I wasn't imagining things, which I thought I was. It was very transparent and steady that night.
My notes from The Yard Scope (36" f/5) at TSP last year read that we could not see the ring.
Bic,
Are you refering to Hoag's object or Arp 147?
Thanks!
I believe I read a report from Faith, that they saw the "Ring" structure of Hoag's Object using that new big OMI scope in the private observatory close by the TSP.
A scope that size is practically cheating right? ; )
Bill
--------------------
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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zizzapnia
super member
Reged: 05/15/06
Posts: 129
Loc: Virginia
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Quote:
I clicked on the NGC numbers and when the website came up it said that the page I requested could not be shown
Edited the post above. Links should work now. I guess my free host doesn't allow direct links to images to protect against hotlinking.  Sorry for the glitch.
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Zizzapnia
http://astronomerica.awardspace.com
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