NGC/IC Project Restoration Effort
(This is a very very beta version)
Location and Magnitude
Right Ascension: 9:30:29.0
Visual Magnitude: 7.2
Discoverer: Herschel J.
Year of discovery: 1834
Discovery aperture: 18.3
Summary description: Cl, cL, pRi, pC, st 10…14
NGC 2910. JH has three observations of this cluster, two in April 1834, the
third on 5 January 1837. The positions scatter over nearly a minute of time,
and three minutes of arc. Assuming that the second observation has an error
of -1.0 minute in RA, that and the third observation are reasonably accordant.
Since the NPD of the first observation is marked uncertain, and since the RA
for that is well off the others, I've left it out of the mean position I
calculated for the cluster. JH simply took the positions at face value and
used them all for a mean that is about 16 seconds of time west of the
cluster's apparent center. That is the position that appears in the GC and
All this is not to suggest that there is doubt about the identity -- there is
not. JH's descriptions are accordant with what we see on the sky, and are
internally consistent, too. Only his positions have the minor problems noted
18" (7/8/02 - Magellan Observatory, Australia): ~50 stars are resolved in an oval or "racetrack" outline oriented NW-SE, perhaps 6'x4', with outliers making the group rounder. Includes a half-dozen stars brighter than mag 11. The SE end of the oval has a rich subgroup over unresolved haze. No concentration, in fact the center of the "racetrack" is nearly devoid of stars!