NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC2643
Basic Information
Location and Magnitude
Right Ascension: 8:42:9.0
Declination: +19:31:20
Constellation: CNC
Visual Magnitude:
Historic Information
Discoverer: Marth
Year of discovery: 1864
Discovery aperture: 48.0
Observational
Summary description: eF neb *
Sub-type: NF
Corwin's Notes
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NGC 2643 = IC 2390. This identity, first suggested by Reinmuth, was taken up
by RNGC. The object was found by Marth in 1864. Correcting his position by
18 seconds of time and 11 arcmin leads to IC 2390. The IC object matches
Marth's description, and there is no other object in the area (the east edge
of the Beehive) that would fit better. NGC 2637 (which see), found by Marth
the same night, also suffers from a declination error of 8 arcmin of the same
sign, though the RA is only off by 6 seconds.
Steve's Notes
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NGC 2643
18" (1/13/07): very faint, very small, round, 15" diameter. Forms the western vertex of a small triangle with a mag 11.5 star 1' SE and a mag 14.5 star 1' NE. Located 10' S of a mag 7 star on the east side of the Beehive cluster with several bright stars in the field including a wide pair of mag 8.5/9.5 stars 4' SW.
17.5" (2/8/97): very faint, very small, round, 15" diameter. Located 1.2' NW of a mag 11.5 star on the eastern side of M44. Several brighter stars in the 22' field at 220x.