NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC4317
Basic Information
Location and Magnitude
Right Ascension: 12:22:41.0
Declination: +31:2:12
Constellation: COM
Visual Magnitude:
Historic Information
Discoverer: Herschel W.
Year of discovery: 1785
Discovery aperture: 18.7
Observational
Summary description: F, S
Sub-type: NF
Corwin's Notes
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NGC 4317 is lost. WH's observation (this is II 324) fits in order with the
rest of the nebulae he found the same night 13 March 1785, many of which were
compared with 13 CVn (= 37 Comae = SAO 63288). II 324 has the same RA offset
as I 76 = N4314, though is supposed to be 1 deg 9 arcmin north of that galaxy.
There is nothing at WH's position.
A possibility for WH's object is NGC 4310 = NGC 4338 (which see). It is at
roughly the correct RA (17 seconds preceding WH's), but is 1 deg 50 arcmin
south of WH's Dec. This makes it unlikely that this is the object he saw.
Finally, Reinmuth, RNGC, and Steinicke have called N4317 a star. I think this
is unlikely as WH would have probably noted the object "very small" or
"extremely small" rather than simply "small."