NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC581
Basic Information
Location and Magnitude
Right Ascension: 1:33:23.0
Declination: +60:39:30
Constellation: CAS
Visual Magnitude: 7.4
Historic Information
Discoverer: Mechain
Year of discovery: 1781
Discovery aperture: 3.0
Observational
Summary description: Cl, pL, B, R, Ri, st 10…11
Sub-type: III2p
Steve's Notes
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NGC 581
13.1" (10/20/84): 50-60 stars in cluster, fairly rich. Includes several bright stars in a distinctive triangular wedge shape containing ·131 at the NW edge (7.3/9.9/11.8 at 14" and 28" lined up to the SE) , colorful orange mag 8.4 SAO 11826 (M2-class supergiant) just SE of center, mag 8.9 SAO 11824 1' S of SAO 11826 and mag 8.2 HD 9365 on the SE edge [not a cluster member].