NGC/IC Project Restoration Effort

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NGC7477

 

Basic Information


Location and Magnitude


Right Ascension: 23:4:40.7
Declination: +3:7:6
Constellation: PSC
Visual Magnitude: 15.7

Historic Information


Discoverer: d'Arrest
Year of discovery: 1866
Discovery aperture: 11.0

Observational


Summary description: F, S, bM * 15, * 17 att n
Sub-type: S

Corwin's Notes

===== NGC 7477 is an asterism of two stars superposed on a fainter galaxy close to d'Arrest's position. It is not, as supposed by Burnham (and Dreyer in an IC1 Note), identical to NGC 7472 = NGC 7482 (which see). D'Arrest describes a 17th magnitude star which is attached to his nebula to the north. N7482 has no such star to the north, while the asterism does (there is also an even fainter star to the southeast that d'A did not see). D'A also discusses Struve's object and suggests that it is identical to his (d'A's). Since Marth's observations had not yet been published when d'A drew up his monograph, this was a reasonable assumption on d'A's part. However, it is probably wrong. Struve's description matches N7482 very well, and d'A's asterism only roughly.

Steve's Notes

===== NGC 7477 18" (9/26/11): this number applies to an extremely faint galaxy with two stars superimposed. At 175x, it appeared as a faint, nebulous patch with one or two very faint stars involved. At 225x, three mag 14.5 stars were resolved including a 15" pair but a third star close north was not involved in the faint glow (perhaps 15" diameter) on the south side. It was easy to see to see how this knot of stars could be taken as nebulous even if the galaxy was not seen. NGC 7482 lies 15' ESE.