NGC/IC Project Restoration Effort

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NGC4817

Basic Information

Location and Magnitude

Right Ascension: 12:56:29.6
Declination: +27:56:25
Constellation: COM
Visual Magnitude: 14.7

Historic Information

Discoverer: Bigourdan
Year of discovery: 1885
Discovery aperture: 12.4

Observational

Summary description: vF, no N
Sub-type: C

Corwin's Notes

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NGC 4817.  The NGC position, and that in the Comptes Rendus list, are wrong;
while the offsets in Bigourdan's big table, and the position reduced from 
them, are correct.  I have not found a correction in any of Bigourdan's errata
lists, so I assume that he did not catch the error, or chose to not mention 
it.

In any case, the reduced position falls exactly on a faint galaxy.  
Bigourdan's note about the star northeast is correct, so the identification is
not in doubt.

Steve's Notes

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NGC 4817

18" (5/12/07): very faint and small, round, 20" diameter.  A mag 14 star lies 1.5' NE.  Located on the west side of AGC 1656 about 45' W of the core.  A similar galaxy, NGC 4828, lies 5.6' NE.