UGC 11798 in Cygnus

[Dragan]

Ok. To get this forum off to a good start I thought this would be a good object. Now I do realize Cygnus isn't in a prime location this time of year but its not every day you get to talk about a galaxy group in the heart of the Milky Way! We needed to get Off the Beaten Path!

UGC 11798
Galaxy group 4-components
Cygnus
21 43 27.0
+43 33 17
15th Mag

I've known about this object for quite some time and always loved seeing it. Its always been a favorite to show others this faint grouping thats so deep in the Milky Way. My most recent observation came on the night of Aug 02/03 of last years Nebraska Star Party. I hadn't seen it in quite some time up that point so it was nice to revisit. Having been the first time they have ever seen it, it definitely impressed some of the others, Tom Miller, John Spack, and Dave Knisely to name a few.

The best view was with 393x using a 8 Ortho. The three brightest components UGC 11798, 11797, 11801 were visible nearly 100% of the time. The fourth, PGC 67244 came and went very fleetingly making an appearance about a 1/3 of the time. . Using a 6 Ortho gave me 525x but it proved to be too much for the conditions.

As a side, UGC 11799 a 14th mag galaxy is located an easy 10' north of 11798 group.

Imagine that! 5 galaxies within 1/2 degree of each other smack dab in the middle of the Milky Way! Cool! :cool:

17 18
(Click thumbnail to enlarge pic)

[Marko]

That is a definite fun group to check out this summer. Very Hicksonesque and within grasp of my scope except maybe the tiny one on the east. The out of frame UGC11799 that you mention all together form what I like to call a pendulum grouping where UGC11799 holds the 'string'. Doubt I'll see the faint SB of UGC11799 but worth a try. I enjoy this sort of group quite a bit. Thanks for the target.

[Jimi Lowrey]

Marko,

The little galaxy to the east PGC 67244 is listed in NED at MAG 15.3 that should be easy from a dark sky site in your 18. I sure would like to hear how you do when it rolls around.

[Spack]

AH, I remember it well from the warmth of last summer.

[Marko]

Marko,

The little galaxy to the east PGC 67244 is listed in NED at MAG 15.3 that should be easy from a dark sky site in your 18. I sure would like to hear how you do when it rolls around.

Good point Jimi, MegaStar shows the same as 15.3. So that is within reach for summer dry skies, should have checked mag. I had not gotten back to this thread but while looking for other pendulum tight groups in my observations I found that Hickson 10 is of that type and it's tiny member is Ngc542 coming in at mag 15.7 which my notes had described only briefly as follows:

NGC 542 And MltG 01 26 30.8 +34 40 31 15.7b 1.0x 0.3'
07/20/09 02:30 LassenBH 338x 5mmTakLE 18SmF3.7
Hick10D: Most difficult of the 4 but averted is a definite show.

I had not noted it was elongated but that is not unusual being near my limits

In any case I look forward to catching the Ugc 17798 group this summer. Thanks.

[Jimi Lowrey]

Marko,
The next time you look at Hickson 10 be sure to try MAC 0125+3434 just north of NGC 529 the Sloan (SDSS) gives it a V MAG of 15.8. Be sure to turn up the power and I bet you can catch that one too.:)

[Steve Gottlieb]

Marko,

The little galaxy to the east PGC 67244 is listed in NED at MAG 15.3 that should be easy from a dark sky site in your 18. I sure would like to hear how you do when it rolls around.

Well, that little galaxy to the east of UGC 11801 (at 21 43 39.0 +43 33 16) went unseen in my 24" a couple of nights ago, though admittedly the seeing wasn't that good. Still, this was from a dark site with a SQM-L reading of 21.65 and elevation 1400 meters.

I took a closer look at the magnitude after I was home and found Megastar states 15.3, but what is the source and if that magnitude is accurate why did I miss it?

The galaxy is listed in NED as 2MASX J21433900+4333157 (http://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Near+Position+Search&in_csys=Equatorial&in_equinox=J2000.0&lon=21+43+39.2&lat=%2B43+33+17&radius=.15&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&z_constraint=Unconstrained&z_value1=&z_value2=&z_unit=z&ot_include=ANY&nmp_op=ANY&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=Distance+to+search+center&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES), but there is no magnitude given.

It's listed in HyperLeda as PGC 67244 (http://leda.univ-lyon1.fr/ledacat.cgi?2MASX%20J21433900%2B4333157&ob=ra), and they give a B mag = 17.91 with a possible error of +/- 0.5. Finally, I checked the original MCG listing for +7-44-5, and the rough photographic mag is given as 18. Neither of these magnitude may be that accurate but in any case I'm pretty sure Megastar is in error and the magnitude may be closer to 17 or fainter.

If anyone else takes a look at the trio of UGCs, I'd like to hear your results on this 4th galaxy just east.

[Uwe Glahn]

Steve,

I tried the group last summer and the 4th galaxy was only tough to see with my 27". 15,3mag has to be wrong, 17,9mag seems to fit very good in my mag estimation.

27", 293x, NELM 6m5+, Seeing V
815