NGC 7753 (UGC 12780, Arp 86) / NGC 7752 (UGC 12779, Mkn 1134) Galaxies in Pegasus

Located at: RA 23 hours 47 minutes 05 seconds, Dec +29 degrees 20 minutes 02 seconds

Size: 3.3' x 2.0' / 1.0' x 0.5' Magnitude: 12.8 photographic / 15.0 blue Class: SAB(rs)bc / I0: HII

North is up

West to the right

Telescope:

14.5" f5 Newtonian reflector

Camera:

  ST-8XME, self-guided, binned 1x1, temp -10c* & -15c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 660 minutes  (66 x 10 minute subs), 11/24 & 12/5/6/2012; seeing 2.9-4.4 FWHM per CCDStack

Processing:

CCDStack 2.66.4490.32361, Photoshop CS5.1

Location:

 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes:* I started shooting this object to 'get away' from the 80% illuminated moon rising in the east on November 24th, but was able to only get one night of imaging before a week of clouds moved in. Posting that one night for now; the moon was about 30 degrees from NGC 7753/52 at the time of imaging, creating a very uneven gradient that was hard to process out. Got two more nights in December 5th & 6th ... the mottled background is the ISM that pervaded Pegasus ... faintly seen in this POSS2/UKSTUBlue image from The STScI Digitized Sky Survey.

* Cooling fan quits at the end of imaging run of 12/5 ... ran cooling without fan @-10c and ~65% power.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7753
NGC 7753 = UGC 12780 = MCG +05-56-005 = CGCG 498-010 = Arp 86 = VV 5a = Ho 816a
23 47 04.8 +29 29 00
V = 12.0;  Size 3.3x2.1;  SB = 14.0;  PA = 50d

13.1": fairly faint, moderately large, weak concentration.  A mag 14 star is 
0.9' SW of center.  Forms a close pair with N7752 2.0' SSW.  This is a M51-type 
system with N7752 at the end of a spiral arm.

- by Steve Gottlieb
Contemporary Visual Observation(s) for NGC 7752
NGC 7752 = UGC 12779 = MCG +05-56-004 = CGCG 498-009 = Arp 86 = VV 5 = Mrk 1134 
= Ho 816b = IV Zw 165
23 46 58.5 +29 27 32
V = 14.3;  Size 0.8x0.5;  SB = 13.2;  PA = 113d

13.1": faint, very small, elongated ~E-W.  Forms a close pair with brighter 
N7753 2' NE.  A mag 14 star is 1.2' NE of center and situated between the 
galaxies.

- by Steve Gottlieb