P. Riepe and T. Zilch added NGC 3631 to the list of intersting galaxies for the TBG project already on 2012-10-01. The reason for that was a faint structure in southwest direction of NGC 3631. The faint structure appeared in the contrast enhanced catalog data from POSS-1 (on the left) as well as in the data from POSS-2 (on the right). Up to now no known galaxy is listed at this position. This object may be a possible unknown dwarf galaxy. The coordinates are: RA = 11 h 20 min 32 s;
De = +53 ° 06 ´43 ´´.
For this object we need professional assistance due to a scientific discussion to show the real nature of this object!