NGC/IC Project Restoration Effort

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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

===== 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

===== 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.