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Observing >> Deep Sky Observing

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Philler
sage


Reged: 07/15/13

Loc: Kansas, USA
Has anyone seen Stephen's Quintet?
      #6086104 - 09/17/13 02:13 PM

I didn't look through all the past threads and I am sure this has been posted before.
I have tried time and again from some pretty decent dark skies and no luck--not even a hint of Stephen's Quintet in my 10" reflector. I have tried different powers. I should have stayed up very late at the TSP and tried, but it seemed right on que we would get clouded out about 10 or 11 each night. Someone said a couple of shots of Jack D. actually helps your averted vision. (Just kidding)

Edited by Philler (09/17/13 02:21 PM)


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John_G
sage


Reged: 01/18/10

Re: Has anyone seen Stephen's Quintet? new [Re: Philler]
      #6086225 - 09/17/13 03:16 PM

I've seen it with my 200mm from a Bortle 3 location on a night with exceptionally good seeing conditions. I only really saw NGC 7320 with averted vision but it definitely had an elongated and broad shape to it. This was with my ES 6.7mm at 149x.

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hbanich
Pooh-Bah
*****

Reged: 06/17/05

Loc: Portland, Oregon
Re: Has anyone seen Stephen's Quintet? new [Re: John_G]
      #6086272 - 09/17/13 03:50 PM

I know people who have seen Stephan's Quintet with an 8 inch scope from a true dark sky site (Oregon Star Party). They described it as seeing a "faint, lumpy smudge" - they couldn't resolve each galaxy but saw them together. So keep at it even if you can't observe under pristine skies, because sometimes an exceptionally transparent sky with mild light pollution is almost as good.

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uwe_glahn
member


Reged: 03/05/06

Loc: Germany
Re: Has anyone seen Stephen's Quintet? new [Re: Philler]
      #6086291 - 09/17/13 04:03 PM

I was very surprised when I tried the group a couple years ago with my small 4" reflector. I only knew the group through a 8" as pretty tough but it also works with 4". The key is 1. to know exactly where the group is and 2. magnification. My best view with the 4" was with 88x (1,1mm AP) and I could separate two faint spots - HCG 92a (NGC 7320) and HCG 92b/d (NGC 7318a/b).

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rinalmj
sage
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Reged: 11/23/09

Loc: Saxonburg, PA
Re: Has anyone seen Stephen's Quintet? new [Re: uwe_glahn]
      #6086349 - 09/17/13 04:40 PM

I saw it a couple weeks ago from a dark site (green zone) with a 12" reflector. I didn't have a good chart or photograph, so I'm not sure which members I saw, but I was able to see 3 fairly easily and I believe I saw a 4th.

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blb
Post Laureate


Reged: 11/25/05

Loc: Piedmont NC
Re: Has anyone seen Stephen's Quintet? new [Re: rinalmj]
      #6086412 - 09/17/13 05:14 PM

I have seen it with my 10-inch dob from the mountains of western North Carolina. A good way to judge weather or not you can see Stephen's Quintet, is to observe the galaxy NGC 7331. This is a large bright galaxy with several companion galaxies. If you can see the companion galaxies of NGC 7331, then it is a good night to observe Stephen's Quintet. The last time I looked at Stephen's Quintet, I could easily see three of these faint galaxies, with a fourth comming in and out of view. Stephen's Quintet is located only about 45 minutes south of NGC 7331 so it is easy to pan south of NGC 7331 to find Stephen's Quintet. With the 10-inch dob Stephen's Quintet looks very much like Howard's description, a "faint, lumpy smudge" Without a chart, I am not sure which ones I saw but I could make out three brighter lumps in the gray smudge. So if you can see NGC 7331's companion galaxies go for Stephen's Quintet by panning south a field-of-view or two, depending on what your eyepieces field-of-view is, and you will be able to see this little cluster of galaxies too.

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RGM
scholastic sledgehammer
*****

Reged: 09/15/03

Loc: Burks Falls, Ontario, Canada
Re: Has anyone seen Stephen's Quintet? new [Re: blb]
      #6086587 - 09/17/13 06:57 PM

As already stated, it/they are just a smudge in smaller scopes. Dark skies also help a lot. I observe from a blue zone. I found it first with my C8 and memorized the star field. Knowing exactly where to look, and under very good CSC conditions, I viewed a very small smudge with my Tak FS78. A couple of times a year I try it, and this thread has reminded me to try again the next no moon cycle.

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JimMo
I'd Rather Do It Myself


Reged: 01/08/07

Loc: Under the SE Michigan lightdom...
Re: Has anyone seen Stephen's Quintet? new [Re: blb]
      #6086600 - 09/17/13 07:03 PM

I saw it from the Oki-Tex Star Party in my 14.5" dob. Like Uwe said it takes magnification. It was fuzzy but distinct with three galaxies and hints at the two others IIRC. A neighbor with a 25" dob was kind enough to show it it me in his scope to verify it, all five galaxies at that aperture. I've tried here at home and recently up in Gladwin under dark(er) skies, I saw the brightest one and hints at two more since I knew where to look.

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aatt
sage


Reged: 07/26/12

Loc: CT
Re: Has anyone seen Stephen's Quintet? new [Re: JimMo]
      #6086713 - 09/17/13 08:18 PM

I have seen 4 with the 5th being a possible threshold observation with a 9mm ES100 using an F4.5 -17.5 inch dob.I had an experienced "SQ" person with me-I have not found it myself yet, but it is on my list.I am hoping to nail it with my 15" on my next dark sky excursion. I will try it from my orange zone, but I have little hope of seeing all 5 from my backyard.

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demiles
professor emeritus
*****

Reged: 11/07/06

Re: Has anyone seen Stephen's Quintet? new [Re: aatt]
      #6086732 - 09/17/13 08:29 PM

I was able to see all five at 350x in my 15in. at BFSP just recently.

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Philler
sage


Reged: 07/15/13

Loc: Kansas, USA
Re: Has anyone seen Stephen's Quintet? new [Re: aatt]
      #6086781 - 09/17/13 08:54 PM

Thanks, I have a pretty good DS site, (don't know these zone classification systems everyone seems to use.) But I will try to take your advise and tips on the Quintet.
I have collected more EPs than I need. I have mostly Meades and Televues and a Televue 1.8 Barlow. l can certainly go well over 150x to 200x something. I even have an old 8mm RKE that I might try that I haven't used in many years that would definately give over 200x with the Barlow, but that's tops that I have now for my 10" Dob. f/4.5, I'll see what happens. I have a feeling though that when I do I will spot them it will be at something like 90x to 150x. I might even try this Deep Sky LP filter, who knows maybe that will do the trick.


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Cathal
member
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Reged: 08/11/09

Loc: Ireland, land of mist and clou...
Re: Has anyone seen Stephen's Quintet? new [Re: Philler]
      #6086862 - 09/17/13 09:37 PM

I saw Stephan's Quintet in a 222mm reflector with a slightly astigmatic primary, and a 18mm kellner eyepiece nigh on 20 years ago. IIRC I spotted 4 of the 5 in the group. Directions from a Sky&Telescope deep sky article on where to find it.

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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Has anyone seen Stephen's Quintet? new [Re: Philler]
      #6087011 - 09/17/13 10:57 PM

I've seen them in my 10" &12". You don't need super high power to see them. I think they were best in my 7mm. Just get NGC 7331 and follow the correct tip toward the Quintet. They're of different sizes, shapes, and brightnesses. Time your attempt for a steady, clear night when they're near the meridian. Know that you will succeed.

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Sasa
professor emeritus


Reged: 11/03/10

Loc: Ricany, Czech Republic
Re: Has anyone seen Stephen's Quintet? new [Re: uwe_glahn]
      #6087293 - 09/18/13 03:21 AM

Uwe, I had similar experience recently with my 110mm refractor.

Philler, I was trying to spot in my 110mm refractor the galaxies from the quintet for about one year. The thing is, you need to know exactly where to look (at least in small refractor, 10" telescope should be more relaxing). Uranometria 2000.0 was not enough. But once I brought to my observatory an inverted image of the NGC7331 area, I was able to see two members of the group (the same as Uwe).


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Jim Curry
Pooh-Bah
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Reged: 10/29/07

Loc: STL
Re: Has anyone seen Stephen's Quintet? new [Re: Sasa]
      #6088334 - 09/18/13 03:59 PM

I bagged the group a few years ago with my 140 refractor. Green skies, exceptionally transparent after a hurricane cleared the summer haze out of New England. I too used an inverted map and walked my eye down star by star from 7331. If memory serves I saw 3 clumps, not all 5. The following weekend, same sky conditions I looked at the group in our club 16" and each galaxy was defined with a bright core. Very cool.

Jim


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Achernar
Postmaster
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Reged: 02/25/06

Loc: Mobile, Alabama, USA
Re: Has anyone seen Stephen's Quintet? new [Re: Philler]
      #6089009 - 09/18/13 10:08 PM Attachment (31 downloads)

Stephan's Quintet is certain visible through a 10-inch from a reasonably dark site, but it will be much fainter than nearby NGC-7331. Blb's right, if you cannot see the companions to NGC-7331, don't bother looking for Stephan's Quintet. If they are visible, Stephan's Quintet will appear and you should see the three brightest galaxies straight away and hints of the other two. Dark skies will be back in a week, try looking for it again if the skies are transparent. The drawing below I made with a 10-inch from the Okie-Tex star party in 2006, since then I have seen it with the same telescope through the quite poor skies of coastal Alabama. It's quite easy through a 15-inch to see all five of the members.

Taras


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ensign
professor emeritus


Reged: 12/16/08

Loc: Southwestern Ontario
Re: Has anyone seen Stephen's Quintet? new [Re: Achernar]
      #6089808 - 09/19/13 12:00 PM

Piece of cake from my light-polluted back yard with a 4.3 inch scope and a Mallincam.

Yes, I know. I didn't really **see** it.


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blb
Post Laureate


Reged: 11/25/05

Loc: Piedmont NC
Re: Has anyone seen Stephen's Quintet? new [Re: ensign]
      #6089843 - 09/19/13 12:19 PM

Quote:

Piece of cake from my light-polluted back yard with a 4.3 inch scope and a Mallincam.

Yes, I know. I didn't really **see** it.



So what did it look like on your monitor? How many of the galaxies did you see? Etc., etc., etc.


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ensign
professor emeritus


Reged: 12/16/08

Loc: Southwestern Ontario
Re: Has anyone seen Stephen's Quintet? new [Re: blb]
      #6090263 - 09/19/13 04:33 PM

Quote:

Quote:

Piece of cake from my light-polluted back yard with a 4.3 inch scope and a Mallincam.

Yes, I know. I didn't really **see** it.



So what did it look like on your monitor? How many of the galaxies did you see? Etc., etc., etc.




Buddy, I made that observation a year or two ago, so I need to repeat the observation to be able to answer with complete accuracy. At the time I was experimenting with a variety of light pollution filters, so I recall that the image was monochromatic, but stood out very clearly on the monitor. I also recall (and I don't really completely trust memories that old) that I was able to see all five members of the quintet and that I was able to observe the ovals of the galaxies with brightening towards the centers.


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hokkaido53
sage


Reged: 05/07/12

Loc: Taos, NM
Re: Has anyone seen Stephen's Quintet? new [Re: ensign]
      #6092596 - 09/20/13 10:23 PM

I don't think I've ever seen all five members of the Quintet at once. With averted vision, I could see 4 in a 12.5" reflector, with the 5th galaxy fading in and out. This was at Cherry Springs State Park. I also saw the 3 brighter galaxies once in a suburban area outside Baltimore.

The transparency has to be good and the Quintet needs to be about 60 degrees in altitude, in my opinion.

Roy


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Feidb
Pooh-Bah


Reged: 10/09/09

Loc: Nevada
Re: Has anyone seen Stephen's Quintet? new [Re: hokkaido53]
      #6094289 - 09/21/13 11:36 PM

I routinely see all 5 in my 16-inch, but the skies have to be dark to see it at all. Buddy is right. If you can first find NGC-7331 and then see any of its companions, then swing a little to the southwest? or is it southeast? and you'll find that little fuzzy lump. In a smaller scope, you'll have a challenge separating them into individual galaxies but in mine it's pretty easy, usually, depending on transparency and darkness.

In my 18mm 82 degree eyepiece (102X), I can pick up NGC-7331, all of it's companions and the quintet in the same field of view.


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ManuelJ
professor emeritus


Reged: 12/19/05

Loc: Madrid, Spain
Re: Has anyone seen Stephen's Quintet? new [Re: uwe_glahn]
      #6099852 - 09/25/13 07:27 AM

Quote:

I was very surprised when I tried the group a couple years ago with my small 4" reflector. I only knew the group through a 8" as pretty tough but it also works with 4". The key is 1. to know exactly where the group is and 2. magnification. My best view with the 4" was with 88x (1,1mm AP) and I could separate two faint spots - HCG 92a (NGC 7320) and HCG 92b/d (NGC 7318a/b).




You are not alone, I've also observed them with 4 inches. Anyone with 3 inch?


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azure1961p
Postmaster
*****

Reged: 01/17/09

Loc: USA
Re: Has anyone seen Stephen's Quintet? new [Re: ManuelJ]
      #6099923 - 09/25/13 08:37 AM

I failed with an 8" under better than 6v sky's but I am confident had I better reference for exact position it would have shown. I've seen similarly faint galaxies elsewhere but I knew with certainty where to look. General scanning in and about the area in a general way yielded nothing.

Pete

Edited by azure1961p (09/25/13 08:39 AM)


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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Has anyone seen Stephan's Quintet? new [Re: Philler]
      #6102617 - 09/26/13 04:19 PM Attachment (27 downloads)

Quote:

I didn't look through all the past threads and I am sure this has been posted before.
I have tried time and again from some pretty decent dark skies and no luck--not even a hint of Stephen's Quintet in my 10" reflector. I have tried different powers. I should have stayed up very late at the TSP and tried, but it seemed right on que we would get clouded out about 10 or 11 each night. Someone said a couple of shots of Jack D. actually helps your averted vision. (Just kidding)



Stephan's Quintet (actually 6 galaxies here) is very near NGC7331, one of the brightest and largest galaxies in Pegasus. If you can't see 7331, don't even bother to try for Stephan's Quintet.
But if you can see one or two of the 4 companions to 7331 (together they form the "Deerlick Group"), then only an eyepiece field (or less) away from 7331 lies Stephan's Quintet.
A magnification of 70-100X will let you know it's there (small smudges right next to each other), but 150-200X is a better view (and higher if the darkness of your skies allows it).
I attach a field 42' wide, with NGC7331 in the upper left and Stephan's Quintet in the lower right.

Edited by Starman1 (09/26/13 04:30 PM)


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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Has anyone seen Stephan's Quintet? new [Re: Starman1]
      #6102619 - 09/26/13 04:20 PM Attachment (34 downloads)

and here is a finder chart for all 6. This is a 20' field.
Magnitudes are:
7317--13.6
7318A--14.3
7318B--13.9
7319--13.1
7320--13.2
7320C--16.7
Don't feel bad if 7320C isn't visible, and don't feel bad if 7318A&B aren't seen as 2 separate galaxies.
Even under pristine skies (>mag.7), 7320C was a "limit" observation for my 12.5".

Edited by Starman1 (09/26/13 04:30 PM)


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David Knisely
Postmaster
*****

Reged: 04/19/04

Loc: southeastern Nebraska
Re: Has anyone seen Stephen's Quintet? new [Re: Philler]
      #6103447 - 09/27/13 02:25 AM

Yup, this has been posted in another recent thread. All I remember seeing of Stephan's Quintet in my 8 inch was a very faint fuzzy 3-lobed blob. Mostly, that it the combination of NGC 7320, 7318A/B, and NGC 7319. Sometimes I can catch NGC 7317 on a good night with the 8 inch just outside of the "tri-lobed blob", but it is hard to see it as there is a faint star almost on top of it. In my 9.25 inch SCT, the tri-lobed blob becomes separate galaxies, but NGC 7318A/B tends to remain a slightly irregular but single fuzzy blob. In my 14 inch, I can get the A/B pair as a sort of "double blob", so they are somewhat resolved in that scope. Indeed, Stephan's Quintet was quite a bit easier than some of the galaxies in the two groups I observed last night (the NGC 6962 group and the NGC 7782 group). Clear skies to you.

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ensign
professor emeritus


Reged: 12/16/08

Loc: Southwestern Ontario
Re: Has anyone seen Stephen's Quintet? new [Re: ensign]
      #6104151 - 09/27/13 12:57 PM

Quote:

Quote:

Quote:

Piece of cake from my light-polluted back yard with a 4.3 inch scope and a Mallincam.

Yes, I know. I didn't really **see** it.



So what did it look like on your monitor? How many of the galaxies did you see? Etc., etc., etc.




Buddy, I made that observation a year or two ago, so I need to repeat the observation to be able to answer with complete accuracy. At the time I was experimenting with a variety of light pollution filters, so I recall that the image was monochromatic, but stood out very clearly on the monitor. I also recall (and I don't really completely trust memories that old) that I was able to see all five members of the quintet and that I was able to observe the ovals of the galaxies with brightening towards the centers.




Over the last few days, a high pressure system has stalled over Southern Ontario giving excellent viewing conditions. Part of my observing was to look at Stephan's Quintet - one session through-the-eyepiece with my 9.25 Edge and later with the Mallincam and my 6" Newt.

Finding the quintet was straightforward with Sky Safari Plus. The field is quite distinctive with two bright stars forming a triangle with the group.

In the 9", at first I thought I might be seeing the bright cores of the galaxies where I thought they should be. Then I realized that these are three faint stars (don't know the magnitude) that conveniently point right at the quintet.

This has puzzled me about M104 - that is, why people sometimes have trouble finding it. It, too, has a line of three stars pointing right at it. But I digress.

Having found the spot where the quintet is supposed to be, I tried a variety of magnifications (and wish I'd paid better attention to which EP I settled on).

In any case, the quintet presented much like NGC 891 does in my modest aperture, in that it is at the edge of my ability and drifts in and out of visibility depending, I think, on my eye position. In any case, I could make out that there was something there in terms of faint ovals, but could see no detail.

The next night the Mallincam and the 6" revealed the quintet clearly at the aforementioned position. They presented as very light grey oval blobs without much detail at all and much fainter than I remember them in the 4.3" a couple of years ago.

Now if I can just get a glimpse at my nemesis NGC 6118 through the eyepiece . . . but no dice so far. The Mallincam, at least, has served to prove that the galaxy actually exists and is where the charts say it is.

Yesterday I decided to re-observe 891. It turns out that my recollection of its difficulty was overstated. I found and observed it quite easily, an elongated streak showing up immediately in the Pentax 40 at 58x. I tried other EPs but the best view was with the 40. I wasn't able to see the dust lane.

Edited by ensign (09/28/13 09:20 AM)


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John_G
sage


Reged: 01/18/10

Re: Has anyone seen Stephen's Quintet? new [Re: azure1961p]
      #6105337 - 09/28/13 05:32 AM Attachment (29 downloads)

Quote:

I failed with an 8" under better than 6v sky's but I am confident had I better reference for exact position it would have shown. I've seen similarly faint galaxies elsewhere but I knew with certainty where to look. General scanning in and about the area in a general way yielded nothing.

Pete




I've seen it only once (sort of) but have searched enough times now that I've now got the star hop pretty much committed to memory. A decent chart is essential the first couple of attempts. As others have mentioned, first locate NGC 7331 and go from there. SkyTool's chart attached. Good luck.


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Niels2011
super member


Reged: 06/09/11

Loc: UK
Re: Has anyone seen Stephen's Quintet? new [Re: John_G]
      #6107910 - 09/29/13 05:26 PM

I saw all 5 this summer in my 8" Newtonian at 168x from Bortle 4 skies. The first occasion didn't resolve 7318a/b:
5th August "Two components clearly seen, 7320, 7318 a/b seen as one component. 7319, 7317, faint fuzzy patches to either side, both these need checking"
But second and third times did:
7th August "Stephan's Quintet. All 5 seen with some effort and over-breathing. Brightest three easily seen and including separation of close components. Outlying two seen with persistent effort"
12th August "Stephan's Quintet. Definitely confirmed all members"

I'm keen to try and repeat the observation from my light polluted home skies, bortle 6 or worse sometimes, but I suspect it won't be possible.

Clear skies


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Niels2011
super member


Reged: 06/09/11

Loc: UK
Re: Has anyone seen Stephen's Quintet? new [Re: Niels2011]
      #6129616 - 10/10/13 06:05 PM

Quote:

I saw all 5 this summer in my 8" Newtonian at 168x from Bortle 4 skies. The first occasion didn't resolve 7318a/b:
5th August "Two components clearly seen, 7320, 7318 a/b seen as one component. 7319, 7317, faint fuzzy patches to either side, both these need checking"
But second and third times did:
7th August "Stephan's Quintet. All 5 seen with some effort and over-breathing. Brightest three easily seen and including separation of close components. Outlying two seen with persistent effort"
12th August "Stephan's Quintet. Definitely confirmed all members"

I'm keen to try and repeat the observation from my light polluted home skies, bortle 6 or worse sometimes, but I suspect it won't be possible.





Update: I did manage to observe the brightest components (7320 and 7318a/b seen as one) from Bortle 6 light polluted skies in my back garden in an 8" Newtonian. Very pleasing as I had not expected it, having tried before. It did help to have found them recently in darker skies. Careful location with Uranometria was necessary, and then some persistence to observe them with averted vision 10-30% of the time, whereas under dark skies they were found by scanning in the general area.

Clear skies


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kt4hx
super member
*****

Reged: 01/21/09

Loc: Fredericksburg, Va
Re: Has anyone seen Stephen's Quintet? new [Re: Niels2011]
      #6138335 - 10/15/13 04:26 AM

I observed it last month from a Bortle 2 location with the Z10. However, as Don mentioned I was unable to resolve 7318A/B as separate objects. It was definitely a challenge and averted vision helped to confirm they were there.

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aatt
sage


Reged: 07/26/12

Loc: CT
Re: Has anyone seen Stephen's Quintet? new [Re: kt4hx]
      #6138892 - 10/15/13 12:02 PM

I finally bagged it from my back yard this weekend.

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kt4hx
super member
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Reged: 01/21/09

Loc: Fredericksburg, Va
Re: Has anyone seen Stephen's Quintet? new [Re: aatt]
      #6138944 - 10/15/13 12:33 PM

Excellent, glad you were successful. The same night under Bortle 2 skies that I got Stephen's, I was able to log two in the Deerlick Group, NGC 7340 and NGC 7335. The remainder were no shows in the Z10.

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SpaceConqueror3
super member


Reged: 09/19/13

Loc: Phinney Ridge, Seattle, WA
Re: Has anyone seen Stephen's Quintet? new [Re: kt4hx]
      #6141135 - 10/16/13 03:18 PM

From my observing log, I see that I saw NCG 7331 and that could barely make out NGC 7320 with my XT10 Dob back in 2006 when I was at the Mt. Kobau Star Party in Canada. I also noted that transparency at that time in the morning wasn't totally optimal. I don't believe I've try to look at that Group since then.

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stevecoe
"Astronomical Tourist"
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Reged: 04/24/04

Loc: Arizona, USA
Re: Has anyone seen Stephen's Quintet? new [Re: SpaceConqueror3]
      #6147077 - 10/19/13 05:13 PM

Howdy all;

Well, I did not plan it that way, but the subject of my "What's Up" article for this month is Stephan's Quintet. It is a fascinating group. I included my drawings and an image from the NGC/IC Project.

You can get to it from the front page, enjoy;
Steve Coe


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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Has anyone seen Stephen's Quintet? new [Re: ensign]
      #6148702 - 10/20/13 04:44 PM Attachment (16 downloads)

Quote:

Piece of cake from my light-polluted back yard with a 4.3 inch scope and a Mallincam. Yes, I know. I didn't really **see** it.


Me neither except on the laptop screen but all this pleading got me opening up the backyard obsy tonight for this 60s snap through my 12" and annotated below. Did I mention London's LP and moonlight?? There's a 6th gxy to the left and more obvious in colour version here

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blb
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Re: Has anyone seen Stephen's Quintet? new [Re: stevecoe]
      #6149488 - 10/21/13 09:21 AM

Quote:

Howdy all;

Well, I did not plan it that way, but the subject of my "What's Up" article for this month is Stephan's Quintet. It is a fascinating group. I included my drawings and an image from the NGC/IC Project.

You can get to it from the front page, enjoy;
Steve Coe



Thanks Steve,
A very nice write up, and one that I enjoyed. I love those sketches too. I would like to know though, if you do, are these galaxies gravationly bound like our local group or are they just a chance alignment?


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Starman1
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Re: Has anyone seen Stephen's Quintet? new [Re: blb]
      #6149581 - 10/21/13 10:23 AM

Quote:

Quote:

Howdy all;

Well, I did not plan it that way, but the subject of my "What's Up" article for this month is Stephan's Quintet. It is a fascinating group. I included my drawings and an image from the NGC/IC Project.

You can get to it from the front page, enjoy;
Steve Coe



Thanks Steve,
A very nice write up, and one that I enjoyed. I love those sketches too. I would like to know though, if you do, are these galaxies gravationly bound like our local group or are they just a chance alignment?




4 of the 5 are gravitationally bound. The 5th is a lot nearer.
Here is a Pic with an explanation under the pic:
http://apod.nasa.gov/apod/ap120225.html


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stevecoe
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Re: Has anyone seen Stephen's Quintet? new [Re: Starman1]
      #6150839 - 10/21/13 11:26 PM

Buddy, glad to hear that the enjoyed the article and the drawings. Fun to hear from a satisfied "customer".

Don has it right the big spiral that AJ and I called "Big Mushy" is not within the group. As I mentioned this grouping is has an Arp designation. Halton "Chip" Arp provided a list of compact galaxy groups that had one or more galaxies at a very different red shift compared to the average of the rest of the members.

I do also love the background galaxies in the HST image, fascinating to realize what I am seeing.

Clear skies;
Steve Coe


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Bill Barlow
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Re: Has anyone seen Stephen's Quintet? new [Re: nytecam]
      #6151078 - 10/22/13 04:09 AM

Nice images of this interesting/distant galaxy group. Your black and white image is about what I see in my C14 from our astro clubs semi-dark site in a yellow-green light pollution zone.

Bill


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nytecam
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Re: Has anyone seen Stephen's Quintet? new [Re: Bill Barlow]
      #6152130 - 10/22/13 06:00 PM

Thanks Bill - much appreciate

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kt4hx
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Re: Has anyone seen Stephen's Quintet? new [Re: Bill Barlow]
      #6153069 - 10/23/13 07:21 AM

Steve, I echo Buddy's appreciation for the article. Having just seen the Quintet for the first time last month, the sketches in particular put it in perspective for me. I also wanted to thank you for the observing notes you post on the SAC website, as they have been very useful for me in the field.

Edited by kt4hx (10/23/13 07:23 AM)


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kt4hx
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Re: Has anyone seen Stephen's Quintet? new [Re: kt4hx]
      #6153071 - 10/23/13 07:25 AM

Nytecam, I will add my thanks to Bill's for the images. Like Steve's sketches, your images reinforced what I saw in the eyepiece last month - with the notable exception I could not split 7318 A&B.

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stevecoe
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Re: Has anyone seen Stephen's Quintet? new [Re: kt4hx]
      #6153953 - 10/23/13 03:43 PM

Alan;

Seeing some detail within the spirals and splitting the tight pair is the reason I was at fairly high power. It also darkening the background for better contrast, if the night will take it.

Thank you for the kind words, I am enjoying the new format of "What's Up" and doing what is seen within one field of view for each article.

Clear skies to us all;
Steve Coe


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saemark30
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Re: Has anyone seen Stephen's Quintet? new [Re: hokkaido53]
      #6175551 - 11/04/13 02:07 PM

So it must be visible in a 6" f/8 achromat.
Anyone try? What conditions are needed?


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saemark30
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Re: Has anyone seen Stephen's Quintet? new [Re: saemark30]
      #6179853 - 11/06/13 07:14 PM

It's spelt Stephan's Quintet from my research.

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Bill Weir
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Re: Has anyone seen Stephen's Quintet? new [Re: saemark30]
      #6180119 - 11/06/13 10:32 PM

Quote:

So it must be visible in a 6" f/8 achromat.
Anyone try? What conditions are needed?




I've seen this galaxy cluster with my 6" dob but it wasn't much. The sky was fairly transparent and the SQM reading was 21.13. Wasn't much to write home about and if I didn't know what to look for and exactly where to look it could easily have been missed.

From a much better site at 6000' with a SQM reading of 21.65 and the Milky way blazing I could just detect a fait glow in the appropriate spot with my little ED 80. Again, knowing what and where was important.

Stephan's I've never really had trouble with. As I work my way through the Hickson groups I've found it to be one of the easier ones like HCG 44 in Leo. Again a group readily detectable in a smaller scope. Now HCG 17 that I had a fail on the other night with my 20" was a tough nut to swallow. I'm chalking it up to the poor sky conditions. Yeh that's it, poor sky conditions.

Bill


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Starman1
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Re: Has anyone seen Stephan's Quintet? new [Re: Bill Weir]
      #6180219 - 11/06/13 11:47 PM

Just a note:
This is named after the French astronomer Édouard Jean-Marie Stephan.
The name is pronounced stuh-fahn' with the final n pronounced like the nasal final n in French, rhyming with the French word "quand" (when).
If you have to Anglicize the name, say stuh-fahn' as if it were German.


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saemark30
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Re: Has anyone seen Stephan's Quintet? new [Re: Starman1]
      #6181615 - 11/07/13 06:27 PM

There must be some mention in Deep Sky Oberving column in S & T by the late Walter Scott Houston for observing with a 6" achromat.
Maybe Stephen O"Meara has seen it in a 4" Genesis!


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JakeSaloranta
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Re: Has anyone seen Stephan's Quintet? new [Re: saemark30]
      #6182120 - 11/08/13 12:48 AM

Sue French reported seeing 3 members with a 105 mm (4.1 inch) telescope @ 203x on her book "Deep-Sky Wonders" (page 268). My own log says "Four, possibly even five members of the Stephan's Quintet visible @ 268x (9') using a 114 mm (4.5") Tal-1 refractor.".

/Jake


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Bill Barlow
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Re: Has anyone seen Stephan's Quintet? new [Re: JakeSaloranta]
      #6184497 - 11/09/13 11:21 AM

Jake, you must have really dark and transparent skies to see that many members with a 114mm refractor. I can make out 4 members with my C14 from our astro clubs observing site in a yellow zone.

Bill


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schang
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Reged: 04/24/13

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Re: Has anyone seen Stephen's Quintet? new [Re: Bill Weir]
      #6185484 - 11/09/13 09:27 PM

You are right. This group of galaxy is a tough one, which I have missed in previous two tries. The third try was a charm last night under good seeing condition. Not being familiar with the pattern of the stars surrounding the NGC 7331, and the upside down image orientation of Newtonian, it is very easy to get lost in search of them in a yellow zone sky. I had to memorize the image near the NGC 7331, convert it back to what it would be like in a Newtonian view, and really focused in the right area to find them. In my 10" scope, they are faint. If you do not pay attention to it, it is very easy to miss them as just another faint stars.

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