NGC/IC Project Restoration Effort

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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

===== 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."