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RA: 00h 07m 19.1s
Dec: +32° 36′ 32″
Ch: MSA:150, U2:89, SA:4
Ref: SIMBAD, Corwin
Type: galaxy, Sb
Mag: B=13.88, V=?
Size: 1.698′ x 0.371′
NGC 7831 = IC 1530. This galaxy was first seen by Lewis Swift on 20 September 1885. Unfortunately, Swift's position is well off the mark, as are his positions for all the galaxies found that night. This one, however, shares a common offset with three of the other galaxies (NGC 19, NGC 21, and NGC 7836). The correct identities are unmistakeable, though, because of Swift's clear descriptions of the star fields surrounding three of the four objects (see NGC 6 for more details). In this case, he notes "bright star south, very faint star very near." The bright star is SAO 053654, and the very faint star is at the southwest end of the galaxy.
Swift's poor position led to the galaxy's being rediscovered by Bigourdan. So, it has ended up with the IC number as well.
The RNGC (Sulentic and Tifft 1973) notes that this is a 14.0 mag galaxy. Their coded description reads EON,BM,HISB.
The Messier objects
The Bennett objects
The Caldwell list
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