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HellsKitchen
sage
Reged: 09/05/08
Posts: 356
Loc: Melbourne Australia
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The first clear sky in 3 weeks. In 3 painful weeks. While the rest of Australia is enjoying spring and wall to wall clear skies, here in Novosibirsk it's been cold and cloudy everyday, so it was finally time for a few precious hours to fill this century's quota of clear sky.
Scope: 12" F4.6 dob Seeing: 3/10 - poor Transparency: 3/5 Dew: light Temp: 10C
Henize 2-163 A PNe in Norma. Started the hunt at Eta Ara and something immediately tripped my alarms. Nearby was a bright hazy blob, whose position did not match that of the nearby galaxy NGC 6221. After much excitement I finally realised that there is another galaxy, NGC 6215 nearby, which turned out to be my imposter comet! These 2 galaxies are very bright, quite surprising really. Might have to observe the area in more detail.
Anyway, The PNe was not seen without the OIII filter, although it was suspected at 404x (massive overkill for the seeing at hand). The OIII immediately made it conspicious. At 283x with the OIII, it was small, circular and I suspected annularity. DSS photos do indeed show it to be a little donut.
DeHt 3 A PNe in Sagittarius. Invisible without OIII, but at 283x with the OIII I could make out faint round blob of light, however it was too faint to conclusively detect any detail.
M 1-54 PNe in Sagittarius. Relatively bright, although very small. Seen without filter at 283x and 404x as a tiny roundish blob. Using the OIII filter revealed an E-W elongation but other than that, no detail within the nebula was seen.
PC 22 PNe in Aquila. Very faint at 217x without filter. Adding the OIII revealed an elongated, somewhat rectangular patch of light, with the southern rim being noticably brighter than the rest of the object. I wanted to use higher mag on this object, but being lower in the sky and with the poor seeing, anything more than the 200x range would render nothing but a blurry mess.
Abell 70 PNe in Aquila. Not visible without OIII but at 283x with the OIII I suspected a very faint haze at the nebula's location, visible only intermittently.
NGC 7009 Saturn Nebula Tried a variety of magnifications on this in an attempt to see the "rings". Surprisingly, despite seeing, my best view was without the OIII filter at 566x. The rings were seen with averted vision intermittently as the seeing boiled away. The knots at the ends were quite evident. Reducing the mag to 353x in an attempt to get a clearer view rendered the rings nearly invisible, and using the OIII did not improve the view.
Uranus I've been wanting to observe Myanus since the dawn of time. Finally, I got the chance. Because seeing was so poor,I was limited to 217x, but got a nice pale Aqua orb. With averted vision, I could spot 2 tiny points of light on either side of the planet intermittently. Upon later research, it turns out that these were the moons Oberon and Titania! Come to think of it, these moons should be a rather easy catch when the seeing cooperates!
I've also had a look at NGC 55, 246 and the Helix Nebula. See attached sketches:
-------------------- S 38º 00' E 145º20'
Custom 12" F/4.6 dob
10" GSO dob
Intes M500 Mak
4.5" Meade Newtonian
Set of Vixen LVWs + TV barlows + powermates
Astronomik 0III, UHC, H-beta filters
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HellsKitchen
sage
Reged: 09/05/08
Posts: 356
Loc: Melbourne Australia
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NGC 55
-------------------- S 38º 00' E 145º20'
Custom 12" F/4.6 dob
10" GSO dob
Intes M500 Mak
4.5" Meade Newtonian
Set of Vixen LVWs + TV barlows + powermates
Astronomik 0III, UHC, H-beta filters
Edited by HellsKitchen (08/18/09 11:41 PM)
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HellsKitchen
sage
Reged: 09/05/08
Posts: 356
Loc: Melbourne Australia
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NGC 246
-------------------- S 38º 00' E 145º20'
Custom 12" F/4.6 dob
10" GSO dob
Intes M500 Mak
4.5" Meade Newtonian
Set of Vixen LVWs + TV barlows + powermates
Astronomik 0III, UHC, H-beta filters
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JayinUT
I'm not Sleepy
   
Reged: 09/19/08
Posts: 953
Loc: Utah
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Sounds like a good session and some fine objects found. Nice observation logs and sketches.
-------------------- Jay in Utah
---------------------------
Location: Lat: 40.514N Long: -112.032W
Mortal as I am, I know that I am born for a day. But when I follow at my pleasure the serried multitude of the stars in their circular course, my feet no longer touch the earth.
— Ptolemy, c.150 AD
My Blog
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sgottlieb
sage
Reged: 07/22/07
Posts: 344
Loc: SF Bay area
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Quote:
Abell 70 PNe in Aquila. Not visible without OIII but at 283x with the OIII I suspected a very faint haze at the nebula's location, visible only intermittently.
Excellent set of PN observations! I know it's been mentioned a few times previously (see http://tinyurl.com/nksqw2), but a great challenge object for dark skies is the anonymous galaxy that shines through the northern rim of Abell 70.
Here are my notes for some of your objects --
M 1-54 = PN G016.0-04.3 18 36 08.4 -16 59 57 V = 12.5; Size 17"x10" 13.1" (8/8/86): at 79x visible as a stellar planetary, good contrast gain with OIII filter, estimate V = 13.2-13.7. At 214x and UHC filter, a nice small disc is visible. Disc can also be viewed without filter at 214x. Located 15' E of mag 7.0 SAO 161631.
DeHt 3 = PN G019.4-13.6 19 17 04.0 -18 01 38 V = 14.1; Size 34"x29" 17.5" (6/6/86): at 105x and OIII filter; faint, fairly small, round, can just hold steadily with averted vision, estimate V = 14.5. Located 14' SW of mag 8.6 SAO 162410. Several mag 12-13 stars are nearby. Discovered in 1980.
PC 22 = PN G051.0-04.5 19 42 03.1 +13 50 39 V = 14.4; Size ~15" 17.5" (7/18/01): found at 220x (without filter) as a fairly faint oval, elongated nearly 2:1 SW-NE, ~20"x12" with a mag 13 star at the NE end. At 380x, a very faint companion is just ENE of the mag 13 star with a brighter mag 12 star 1' SE. This is an interesting PN at high power with a relatively high surface brightness and unusual elongation. Located 14' ENE of mag 6 SAO 105132.
Abell 70 = PN G38.1-25.4 20 31 33.2 -07 05 17 V = 14.7; Size 45"x40" 18" (7/15/07): at 260x without filter, appeared faint, fairly small, round, 36" diameter with a hint of annularity. On the north side of a rim is a quite noticeable knot or brightening (anonymous galaxy shining through the rim). With direct vision this knot is sometimes nearly stellar (core of the galaxy?) but with careful averted vision, the faint galaxy is definitely elongated ~2:1 WNW-ESE, ~18"x8".
-------------------- Steve Gottlieb
18" f/4.3 Starmaster
Adventures In Deep Space
7500+ NGC/IC Visual Descriptions
NGC/IC Project
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AlanK
professor emeritus
Reged: 01/26/07
Posts: 512
Loc: Auckland, New Zealand
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Nice sketches and report! Those none NGC/IC planeteries (I usually refer to as PK's) are interesting to track down. At the other extreme end, many appear stellar and unimpressive although at very high powers with good seeing even some of those can show as tiny disks.
-------------------- 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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HellsKitchen
sage
Reged: 09/05/08
Posts: 356
Loc: Melbourne Australia
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Quote:
Quote:
Abell 70 PNe in Aquila. Not visible without OIII but at 283x with the OIII I suspected a very faint haze at the nebula's location, visible only intermittently.
Excellent set of PN observations! I know it's been mentioned a few times previously (see http://tinyurl.com/nksqw2), but a great challenge object for dark skies is the anonymous galaxy that shines through the northern rim of Abell 70.
Here are my notes for some of your objects --
M 1-54 = PN G016.0-04.3 18 36 08.4 -16 59 57 V = 12.5; Size 17"x10" 13.1" (8/8/86): at 79x visible as a stellar planetary, good contrast gain with OIII filter, estimate V = 13.2-13.7. At 214x and UHC filter, a nice small disc is visible. Disc can also be viewed without filter at 214x. Located 15' E of mag 7.0 SAO 161631.
DeHt 3 = PN G019.4-13.6 19 17 04.0 -18 01 38 V = 14.1; Size 34"x29" 17.5" (6/6/86): at 105x and OIII filter; faint, fairly small, round, can just hold steadily with averted vision, estimate V = 14.5. Located 14' SW of mag 8.6 SAO 162410. Several mag 12-13 stars are nearby. Discovered in 1980.
PC 22 = PN G051.0-04.5 19 42 03.1 +13 50 39 V = 14.4; Size ~15" 17.5" (7/18/01): found at 220x (without filter) as a fairly faint oval, elongated nearly 2:1 SW-NE, ~20"x12" with a mag 13 star at the NE end. At 380x, a very faint companion is just ENE of the mag 13 star with a brighter mag 12 star 1' SE. This is an interesting PN at high power with a relatively high surface brightness and unusual elongation. Located 14' ENE of mag 6 SAO 105132.
Abell 70 = PN G38.1-25.4 20 31 33.2 -07 05 17 V = 14.7; Size 45"x40" 18" (7/15/07): at 260x without filter, appeared faint, fairly small, round, 36" diameter with a hint of annularity. On the north side of a rim is a quite noticeable knot or brightening (anonymous galaxy shining through the rim). With direct vision this knot is sometimes nearly stellar (core of the galaxy?) but with careful averted vision, the faint galaxy is definitely elongated ~2:1 WNW-ESE, ~18"x8".
Thanks Steve. Abell 70 to me was extremely faint, I'll need darker skies to have a change of seeing it properly. PC 22 and M1-54 just invite magnification, but with the pathetic seeing I had on the night, I had little to work with It seems seeing in Melbourne is rarely ever decent going by my experience.
-------------------- S 38º 00' E 145º20'
Custom 12" F/4.6 dob
10" GSO dob
Intes M500 Mak
4.5" Meade Newtonian
Set of Vixen LVWs + TV barlows + powermates
Astronomik 0III, UHC, H-beta filters
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Jeff Young
Post Laureate
   
Reged: 08/04/05
Posts: 4122
Loc: Ireland
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Nice report and excellent sketches!
-- Jeff.
-------------------- Nikon 18x70s / UA Millennium Colorado:
Solarscope SF70 / TV Pronto / AP400QMD Coronado SolarMax40 DS / Bogen 055+3130
APM MC1610 / Tak FC-100 / AP1200GTO Tak Mewlon 250 / AP600EGTO
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