NGC/IC Project Restoration Effort

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NGC7772

 

Basic Information


Location and Magnitude


Right Ascension: 23:51:45.0
Declination: +16:14:54
Constellation: PEG
Visual Magnitude:

Historic Information


Discoverer: Herschel J.
Year of discovery: 1825
Discovery aperture: 18.3

Observational


Summary description: Cl of sc st 10 m
Sub-type: III1p

Corwin's Notes

===== NGC 7772 is an astersim of 7 stars, the southwestern brighter than the others. While probably not a physical cluster, it is a striking object, well isolated, and would probably stand out quite nicely at the eyepiece. This is one of JH's earliest discoveries, found in his Sweep No. 11 (of 810!) on 7 October 1825. Even though his published RA carries a double colon, it is accurate. His descriptions in the early sweeps tend to be terse; this one is no exception: "A cluster of scattered stars 10m." This is, nevertheless, appropriate to the object. As far as I know now (May 2016), this explanation for the NGC number was first proposed by Andrew Young in the January 1963 Sky and Telescope (Vol. 25, p. 14) "Letters" column. Andy was citing a question posed by Walter Scott Houston, in his "Deep Sky Wonders" column in the October 1962 issue (Vol. 24, p. 221) -- Scotty had run across the object plotted in Norton's Atlas, but found nothing remarkable on the sky. He gave an approximate position of 23 49.0, +15 59 (1950), close to the position of the asterism. The compilers of Norton's Atlas apparently thought enough of the object to include it, but they had several other deep sky objects plotted that puzzled those of us using the Atlas regularly. Given Norton's importance to an earlier generation of amateurs, it would be interesting to us to know a little of the history of the Atlas. Half a century on, I certainly don't remember any of that history myself. But I certainly do remember pouring over the Atlas as an eager teenaged observer, trying to find many of its deep sky objects!

Steve's Notes

===== NGC 7772 13.1" (9/29/84): small group of 7 stars from mag 11.5-14.5. The two brightest stars are at the southwest and north end. The other five stars are arranged in a distinctive "V" asterism with a vertex and open to the east. The status as a cluster is questionable and this group may be an open cluster "remnant".