NGC/IC Project Restoration Effort

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NGC2331

 

Basic Information


Location and Magnitude


Right Ascension: 7:6:59.8
Declination: +27:15:42
Constellation: GEM
Visual Magnitude: 8.5

Historic Information


Discoverer: Herschel W.
Year of discovery: 1785
Discovery aperture: 18.7

Observational


Summary description: Cl, L, vlC, S Cl inv
Sub-type: IV1p

Corwin's Notes

===== NGC 2331 is a large, scattered cluster of pretty bright stars. There is a concentration of several stars on the southeast edge that attracted JH's attention enough that he took it as the position for the whole object. Thus, the position in the main table is about 8 arcmin northwest of the NGC place, copied directly from GC and JH. A curious footnote to this object is in the "Other Observers" column in the NGC: "Flamsteed." I do not know yet why Dreyer credited Flamsteed with the discovery -- there is no mention of the object in Kenneth Glyn Jones's fine book, "The Search for the Nebulae." According to Glyn Jones, Flamsteed did find several other objects in the area, including M 41 and NGC 2244. But this cluster is missing from his catalogue and atlas.

Steve's Notes

===== NGC 2331 17.5" (1/20/90): at 82x, very large scattered group of about 40 stars mag 10-14, 15' diameter. There is a small circle of 6 stars at the east end. The classification of this group as a true cluster is doubtful.