Galaxy NGC 7640
Distance measurements of this SBc-type galaxy range from 8.4 Mpc to 11.9 Mpc.  There are indications, that the increased star formation is due to a recent interaction with a smaller galaxy. 
|Right Ascension (J2000.0)||23h 22m 06.6s|
|Declination (J2000.0)||+40° 50' 42"|
|Diameter||10.5 × 1.8 arcmin|
|Photographic (blue) magnitude||11.9 mag|
|Visual magnitude||11.3 mag|
|Surface brightness||14.5 mag·arcmin-2|
|Distance derived from z||5.20 Mpc|
|Metric Distance||8.510 Mpc|
|Dreyer Description||cF, L, mE 164°, vlbM, r|
|Identification, Remarks||UGC 12554, MCG 7-48-2, CGCG 532-17, CGCG 533-1, IRAS 23197+4034|
The galaxy NGC 7640 is located in the constellation Andromeda. The best observation time is July to February, when it is highest at night.
Description pending ...