astronron
member
Reged: 04/27/08
Posts: 44
Loc: Queensland Australia
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Thankyou I have noted them but most will be beyond the capabilities of my 16 " even though I have just started to observe as many ARP galaxies as I can from my far southern location. Ron
-------------------- Ron
16"Truss Newtonian
8" Celestron SCT
15x65 Binoculars
Roll off roof observatory
2 acre dark site
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robinsondd
sage
Reged: 05/28/07
Posts: 321
Loc: St. Mary's City, MD
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Quote:
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
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Lots more, I'm sure.
Finally got around to checking these out. Very cool, thanks for taking the time to post them.
-------------------- David Robinson
Lexington Park, MD
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"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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zizzapnia
super member
Reged: 05/15/06
Posts: 129
Loc: Virginia
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My brother and I checked out Hoag's Object in Gary Myers' (StellarCat) 30-inch last year in Arizona. It was very dim and tiny. A little round fuzzy patch, like a small dim planetary, definitely non-stellar. The center "bright" core was surrounded by a very dim outer shell (the ring) only visible a very small percentage of the time in averted vision.
-------------------- Zizzapnia
http://astronomerica.awardspace.com
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Jeff Young
Post Laureate
   
Reged: 08/04/05
Posts: 4112
Loc: Ireland
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Right, so given the various reports on Hoag's Object:
- very tough in 16" under transparent alpine skies
- no outer ring in various instruments up to 36" from lower altitudes
- difficult observation in 30" from Arizona (which is likely at some altitude)
I'm going to conclude that it's out of my reach (16" Mak-Cass, NELM 6, sea-level skies).
M77 is nice, but doesn't really make my bar for "overtly ring-like" (nor do any of the polar rings). Same for Arps 140 through 144.
I've made one attempt at Arp145, to no avail.
Arp146, 147 and NGC985 are all smaller but appear to have somewhat higher surface brightness. Perhaps they represent my best chances on a night of good transparency and seeing? (Although AlanK's observation of IC298/Arp147 with an 18" isn't very encouraging, nor is its absence from NSOG.)
NGC6028 looks really cool in the photos, and I've seen PNs that dim, but I'm going to get no assist from a narrow-band filter with a galaxy. Anyone have any observations of it?
Most of the other NGC's seem to have a reasonably bright core, but extremely faint rings. Generally speaking, UGC's are smudges through my scope (when visible at all).
Anything easier I should be aware of?
Thanks, -- 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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Alvin Huey
Carpal Tunnel
   
Reged: 10/18/05
Posts: 1831
Loc: NorCal
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Another really good ring galaxy is 7 Zw 466 in Draco
DSS-II
Sloan DSS
-------------------- Clear Skies,
Alvin #26
22" f/4.0 reflector and 30" f/4.3 StarMaster
FaintFuzzies | TAC | TAC-Sac
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Jeff Young
Post Laureate
   
Reged: 08/04/05
Posts: 4112
Loc: Ireland
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Cool; thanks Alvin.
(For anyone looking this up in SIMBAD, it wants the 7 in roman numerals, although it accepts both "VII Zw 466" and its preferred "Zw VII 466".)
Cheers, -- 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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Jeff Young
Post Laureate
   
Reged: 08/04/05
Posts: 4112
Loc: Ireland
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I was hunting down some more DSS images of these, and the Cartwheel Galaxy (ESO 350-40) actually looks quite bright. Anyone have observations of it?
-- 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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Cygnus_x1
Sketcher Extraordinaire
   
Reged: 11/17/04
Posts: 2384
Loc: 50N - too far north!
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Quote:
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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
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.
I can indeed chime in - sorry it's a few months late, I missed this thread somehow! Here's what I wrote on my blog, from the notes I made that night: 'The most interesting object of the night was the ring galaxy Hoag's Object (PGC 54559) in Serpens Caput, seen though the [Jim Chandler's] 30 inch. The core was seen easily enough but the ring was tougher. Some people saw it, others didn't. I eventually saw it, but only after a lot of staring with averted vision. Part of it popped into view, then another part and eventually the whole ring appeared for a second before disappearing again.' I didn't see it with any of the other scopes. I didn't look at it with the 36", for some reason.
-------------------- Visual Deep Sky Observing - being rebuilt
Observing blog
My astronomy event photos on Flickr
12 inch Dob
8 inch Celestron C8 Newtonian
4 inch Meade SCT
8x42 Leica binoculars
Various TeleVue eyepieces
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Alvin Huey
Carpal Tunnel
   
Reged: 10/18/05
Posts: 1831
Loc: NorCal
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I just re-read the entire thread and noticed that I didn't post that Jimi and I observe Hoag's through his 48" reflector. It was something else.
-------------------- Clear Skies,
Alvin #26
22" f/4.0 reflector and 30" f/4.3 StarMaster
FaintFuzzies | TAC | TAC-Sac
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Jeff Young
Post Laureate
   
Reged: 08/04/05
Posts: 4112
Loc: Ireland
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Cool! So all I need is a 30" to 48" scope! 
The Cartwheel looks much brighter (at least on the DSS images). Anyone give it a go?
Cheers, -- 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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skyward_eyes
Carpal Tunnel
   
Reged: 12/12/06
Posts: 2100
Loc: Arizona
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These sound like pretty cool objects, I am going to have to give it a try with my 16" and my Arizona skies!
-------------------- www.skywardeyes.webs.com
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Tom Trusock
   
Reged: 02/26/02
Posts: 29940
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Neat thread!
-------------------- Hyperbole - undoubtedly the best thing ever.
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