NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC841
Basic Information
Location and Magnitude
Right Ascension: 2:11:17.4
Declination: +37:29:51
Constellation: AND
Visual Magnitude: 12.6
Historic Information
Discoverer: Herschel W.
Year of discovery: 1787
Discovery aperture: 18.7
Observational
Summary description: pB, vS, mbMN = * 13ยท14
Sub-type: SBab
Corwin's Notes
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NGC 841 is the brightest of three galaxies forming a small group (the others
are NGC 834 and 845). Though credited to Stephan (who has a note that it is
clearly distinct from the other two, indicating that he saw all three), it was
actually found by WH, and observed by d'Arrest.
Interestingly, JH saw only the faintest of the three. Though his position is
virtually exact for it, he was enough convinced that his object and his
father's were the same that he equated them. So, in GC he noted a 1 minute of
time difference in the RA's and adopted his own. For N834, he used his
father's position since he did not come across it during his own sweeps.
Thus, when Stephan observed the trio, he found two GC objects at their correct
positions, and a "new" nebula which he measured and included in his list of
"novae".
Like WH, d'A also saw only the brightest of the three, but made the RA about
13 seconds too large (17 seconds larger than WH's). He, too, assumed that all
the observations referred to the same object, so that is how Dreyer put them
into NGC. There, Dreyer adopted d'A's RA for NGC 845.
The credits for H III 604 and d'A need to be moved from NGC 845 to NGC 841.
Aside from that and the adjustment needed for the RA of N845, the NGC is
pretty close to being correct.
Steve's Notes
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NGC 841
17.5" (11/14/87): moderately bright, fairly small, slightly elongated NW-SE, very bright core, stellar nucleus. NGC 834 lies 11' NNW and UGC 1695 = (R)NGC 845 12' E. This galaxy is identified as NGC 841 in the RNGC, UGC, CGCG, MCG.