· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Observing >> Deep Sky Observing Previous   Index   Next   Threaded   Pages: 1 Bill Barlow Carpal Tunnel Reged: 12/03/07 Loc: Overland Park KS Companion galaxy/fuzzy object bound to M33?       #5556520 - 12/05/12 10:01 PM Edit   Reply   Quote Quick Reply   I was out last night with my Meade 12 ACF and during the course of the observing session, went to look at M33, the Triangulum galaxy. I noticed that at about the 3 o'clock position on the edge of M33's outer arms, there was a round, somewhat bright object that looked like a small companion galaxy to M33. Or is it something else? I seem to remember seeing this same object with my C14 about 3 weeks earlier. Does anyone know what this is? Thanks. Bill Post Extras:       blb Post Laureate Reged: 11/25/05 Loc: Piedmont NC Re: Companion galaxy/fuzzy object bound to M33? [Re: Bill Barlow]       #5556576 - 12/05/12 10:31 PM Edit   Reply   Quote Quick Reply   I think your seeing NGC 604, a very bright HII region in M33. Post Extras:       Dave Mitsky Postmaster Reged: 04/08/02 Loc: PA, USA, Planet Earth Re: Companion galaxy/fuzzy object bound to M33? [Re: blb]       #5556692 - 12/05/12 11:58 PM Edit   Reply   Quote Quick Reply   I'll second that. http://astronomy-mall.com/Adventures.In.Deep.Space/M33.HII-Star.Clouds.html Dave Mitsky Post Extras:       Bill Barlow Carpal Tunnel Reged: 12/03/07 Loc: Overland Park KS Re: Companion galaxy/fuzzy object bound to M33? [Re: Dave Mitsky]       #5557202 - 12/06/12 10:15 AM Edit   Reply   Quote Quick Reply   Thanks for the information. Pretty neat object to view at higher magnifications. Bill Post Extras:       Feidb Pooh-Bah Reged: 10/09/09 Loc: Nevada Re: Companion galaxy/fuzzy object bound to M33? [Re: Bill Barlow]       #5557540 - 12/06/12 01:22 PM Edit   Reply   Quote Quick Reply   Yeah, it was NGC-604. There's a lot of M-33 that isn't obvious in the eyepiece. It's a lot larger than first or even second glance. 604 is just the brightest knot in a spiral arm that extends out and may very well be invisible because of the low surface brightness of the galaxy. Sometimes it's tough to see any of it if the conditions aren't right, despite the apparent magnitude. Post Extras:       Achernar Postmaster Reged: 02/25/06 Loc: Mobile, Alabama, USA Re: Companion galaxy/fuzzy object bound to M33? [Re: Bill Barlow]       #5558091 - 12/06/12 07:01 PM Edit   Reply   Quote Quick Reply   That was NGC-604, the largest and brightest H-II region in M-33, which is 1,000 light years across. It's larger and more massive than any star forming region known in our own galaxy, but the Tarantula nebula in the Large Magellanic Cloud is similar to this object. From a dark site, you will see more H-II regions in M-33 along the spiral arms, making it look like it has the measels. Taras Post Extras:       GlennLeDrew Postmaster Reged: 06/18/08 Loc: Ottawa, Ontario, Canada Re: Companion galaxy/fuzzy object bound to M33? [Re: Achernar]       #5558422 - 12/06/12 10:51 PM Edit   Reply   Quote Quick Reply   It sure seems to be NGC 604, as noted by others. If there was any doubt, the stated position of "3 o'clock" from M33's nucleus is not unambiguous. How do we know if it's with respect to celestial north, local vertical, or some other orientation? Is the view correct or mirror-reversed? At what distance from the galaxy's center does the object lie? Is there any prominent star or star pattern in the immediate vicinity? These are useful data to supply when asking for help in identifying. Post Extras:       Bill Barlow Carpal Tunnel Reged: 12/03/07 Loc: Overland Park KS Re: Companion galaxy/fuzzy object bound to M33? [Re: GlennLeDrew]       #5559962 - 12/07/12 09:00 PM Edit   Reply   Quote Quick Reply   I did mention that it was in the 3 o'clock position in the eyepiece near the edge of the galaxies outer arm when viewed through a Meade 12" ACF SCT. I guess I assumed that most would know that this would be a mirror reversed image using the Meade 12. My bad, I guess. Bill Post Extras:       Bill Weir Carpal Tunnel Reged: 06/01/04 Loc: Metchosin (Victoria), Canada Re: Companion galaxy/fuzzy object bound to M33? [Re: Bill Barlow]       #5560188 - 12/07/12 11:50 PM Edit   Reply   Quote Quick Reply   Remember though that to the observers perspective at the beginning of the evening the point of an object that is at the 12 o'clock rotates to the 6 o'clock position 6 hrs later. Bill Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 2 registered and 5 anonymous users are browsing this forum. 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