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EdZ
Professor EdZ
Reged: 02/15/02
Posts: 12569
Loc: Cumberland, R I , USA42N71.4W
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Re: NGC 7331 - Stephan's Quintet
08/09/06 03:16 PM
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The NGC database lists 7320 as the brightest of the Quintet, however, it is listed as Sb=13.5. Size is 2.2'x1.1' or only 2.4 sq arcmin. The observing notes that accompany the NGC state it does have a brighter core, but go on to say in 8" extremely faint, small; in 6" marginal but at moments glimpsed at 115x.
For comparison NGC 6207 near M13 is 3x1.4' or 4.2sq arcmin and has Sb of 12.9 with a bright stellar nucleus.
NGC 7331 north of Stephan's Quintet is 39 sq arcmin and Sb is 13.3, but it has a very bright elongated core, so a smaller portion would appear much brighter than Sb13.3.
Interesting to note, NGC7320 and the other four galaxy members of the quintet all fit in an area less than one half the size of NGC 7331.
edz
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member#21
Edited by EdZ (08/10/06 06:06 AM)
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