NGC/IC Project Restoration Effort

(This is a very very beta version)

NGC2311

 

Basic Information


Location and Magnitude


Right Ascension: 6:57:47.5
Declination: -4:36:41
Constellation: MON
Visual Magnitude: 9.6

Historic Information


Discoverer: Herschel C.
Year of discovery: 1783
Discovery aperture:

Observational


Summary description: Cl, lC, not Ri
Sub-type: III2p

Steve's Notes

===== NGC 2311 18" (3/4/08): at 225x, ~40 stars are resolved in a fairly rich 5'x3' group, elongated NW-SE. The cluster includes a few pairs with a nice equal mag pair on the south side. A weak stream of stars trails off to the east from the SE end of the cluster towards a mag 9.8/10.4/13 triple at 3" and 9" (ADS 5636). 17.5" (1/1/92): three dozen stars mag 11-15 in 5'x2' region elongated ~N-S. Fairly rich though no dense spots. Most stars form a thin isosceles triangle with the vertex star mag 13 at the north end, although the brightest star is a wide double 2' ESE of the vertex. From the base of the triangle a stream heads SE and then east from the cluster mixing with some brighter field stars. The cluster includes a few close faint double stars.