NGC/IC Project Restoration Effort

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NGC772

 

Basic Information


Location and Magnitude


Right Ascension: 1:59:19.5
Declination: +19:0:27
Constellation: ARI
Visual Magnitude: 10.3

Historic Information


Discoverer: Herschel W.
Year of discovery: 1785
Discovery aperture: 18.7

Observational


Summary description: B, cL, R, gbM, r
Sub-type: Sb

Corwin's Notes

===== NGC 772 is a large spiral, close enough that LdR and Dreyer himself saw the brightest knot in the northern arm. See that story in the "notngc" file under the object "N0772 HII".

Steve's Notes

===== NGC 772 48" (11/1/13): very bright, very large, elongated at least 5:3 WNW-ESE, ~5.4'x3', sharply concentrated with a blazing core that increases to the center. Contains two spiral arms, though dominated by a bright, long arm that attaches to the core on the east side, wraps counterclockwise to the north of the core and then extends in a fairly thin arch to the west. The arm extends over 3' in length and ends at the northwest tip of the galaxy, ~2.5' from the center. It contains 1 or 2 very faint HII knots. A second low contrast arm begins at the south end of the core and spirals out clockwise to the east. This arm is broader and does not have a sharply defined edge but was fairly easily visible. The outer halo to the southeast of this arm has a very low surface brightness. Forms an interacting pair with NGC 770 3.5' SSW. PGC 212884 (8x the redshift) was easily picked up 5.8' SW and appeared fairly faint, small, round, 18" diameter. 24" (9/7/13): bright, very large, elongated 5:3 WNW-ESE, 4'x2.5'. Strongly concentrated with a very bright oval core. The halo is clearly asymmetric and more extensive on the NW side. With careful viewing a long arm is visible at 200x extending from the central region towards the NW. The arm is better separated from the main body at 450x and ends near NGC 772:[HK83] 57, a slightly brighter HII knot that appears as an extremely faint, "soft" star. 18" (12/3/05): bright, very large, elongated 4:3 WNW-ESE, roughly 4'x3'. The halo is asymmetric and more extensive on the NW side with a very strong impression of a spiral arm attached on the north side and sweeping to the west (confirmed on image). Forms a pair with much fainter NGC 770 3.5' SSW. 13.1" (11/5/83): bright, moderately large, slightly elongated, sharp concentration. Forms a close pair with NGC 770 3.5' SSW. 8" (10/4/80): fairly faint, fairly large, oval, bright core, two mag 11 stars to SE.