NGC/IC Project Restoration Effort

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NGC7436

 

Basic Information


Location and Magnitude


Right Ascension: 22:57:56.2
Declination: +26:8:59
Constellation: PEG
Visual Magnitude: 12.6

Historic Information


Discoverer: Herschel W.
Year of discovery: 1784
Discovery aperture: 18.7

Observational


Summary description: F, pS, F * att p, gbM
Sub-type: E0

Corwin's Notes

===== NGC 7436. The "F * att p" noted in the NGC is actually another galaxy. It was first seen on 12 October 1855 when R.J. Mitchell noted it as "... a * or nebulous knot closely p [NGC 7436]; ..." On 18 September 1857, he wrote, "... closely p is a * or sharply defined nebulous patch, ..." Finally, on 29 September 1875, Dreyer observed the group and wrote, "The object p in the diagram from 1857 is a F *. Night bad." So it was that the companion to NGC 7436 did not receive an NGC number. It is in the "notngc" files, and is also included as "NGC 7436B" in the main position file where I have finally (March 2015; sorry it took so long) fixed the CGCG, MCG, and UGC identifications (note that the UGC letters components of multiple systems in RA order). Yann Pothier has pointed out that there is also an even fainter galaxy that Dreyer picked up on his "bad" night about one arcminute south of NGC 7436. It was not included in the sketch in LdR's monograph, but is the only object just south of the bright galaxy, so the identity is not in question. This is also in the "notngc" files where you will find a bit more about it. See NGC 7433 for a bit more on the group.

Steve's Notes

===== NGC 7436 48" (10/26/16): brightest of a total of 8 galaxies observed within 4'. At 610x; bright, moderately large, round, sharply concentrated with a very bright small core, increasing to a stellar nucleus. The halo has a much lower surface brightness and contains NGC 7436B, which pokes out of the halo on the west side. The contact companion appeared moderately bright, fairly small, very elongated 3:1 E-W, 24"x8", very small bright nucleus. 24" (7/20/12): brightest and central galaxy in a group with three extremely close companions. At 325x appeared moderately bright and large, round, ~1' diameter. Sharply concentrated and dominated by a very bright small core. The halo has a low surface brightness and gradually fades out, but seems to encompass NGC 7436B = VV 84b, which appeared as a faint or fairly faint thin spike, ~22"x8", emerging from the halo and extending west. NGC 7435 is just 57" SW and NGC 7433 is 1.5' NW. Also nearby are MCG +04-54-007 2.4' S, PGC 1766408 3.4' NW, NGC 7431 4.2' WNW and PGC 1768375 is 5.7' NNW. MCG +04-54-007 is extremely faint or very faint, very small, round, 12" diameter. A mag 16.1 star lies 20" E. PGC 1766408 is extremely faint, very small, irregularly round, 15"x12". PGC 1768375 is extremely faint and small, round, 9" diameter. Collinear with a mag 15 star 0.7' NE and a mag 13 star 1.2' NE. 17.5" (8/25/95): brightest in a tight group of four galaxies including NGC 7431, NGC 7433 and NGC 7435. Fairly faint, small, round, 1.2' diameter. Well concentrated with a small, bright core. The view is confused by a companion, which is partially superimposed on the west side of the halo and creates the impression of elongation E-W. A mag 15 star is 50" SW and a mag 14.5 star 1.3' WNW. 17.5" (9/2/89): brightest in a group, faint, small, slightly elongated N-S, bright core. Forms a double system with NGC 7433 attached at the west end. In a group with NGC 7435 1.0' SW, NGC 7431 2' NW (not seen). Located 15' E of mag 8.9 SAO 90886.