sponsored by psychohistorian.org
Type: galaxy, SBb
Mag: B=14.2, V=13.4
Size: 1.5′ x 0.7′
NGC 6497 = NGC 6498. Swift found his 80th and 81st nebulae on 16 Sept and 26 Sept 1884, respectively. The positions are only 1 second of time and 32 arcsec apart, and the descriptions are close enough that the only galaxy in the area can match both. In particular, Swift says of N6497, "Close s of middle * of 3 in a line, middle * the fainter;" and of N6498, "B * nr; F * v nr." The middle star in the line is the "faint star very near," and the bright star is the eastern of the three stars.
So, I'm almost certain that the two observations refer to the same object, and that Swift added the comments "np of 2" and "sf of 2" as he was preparing his first list for publication.
The RNGC (Sulentic and Tifft 1973) notes that this is a 14.5 mag galaxy. Their coded description reads EL,DIF,BM,STELNUC SLEL,SBSTR SUSP.
The Messier objects
The Bennett objects
The Caldwell list
DOCdb is still in beta-release.
Known issues, feature requests, and updates on bug fixes, are here:
Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!
DOCdb is a free online resource that exists to promote deep sky observing.
You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.
Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.