NGC 7537 is a spiral galaxy located in the equatorial constellation of Pisces, about 1.5° to the NNW of Gamma Piscium.[7] It was first documented by German-born astronomer William Herschel on Aug 30, 1785. J. L. E. Dreyer described it as, "very faint, considerably small, round, brighter middle, southwestern of 2".[8] This galaxy lies at a distance of approximately 127 Mly (39 Mpc) from the Milky Way,[3] and is a member of the Pegasus I cluster.[4]
NGC 7537 | |
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Observation data (J2000 epoch) | |
Constellation | Pisces |
Right ascension | 23h 14m 34.497s[1] |
Declination | +04° 29′ 54.02″[1] |
Redshift | 0.009633[2] |
Heliocentric radial velocity | 2,888±4 km/s[2] |
Distance | 127 Mly (39 Mpc)[3] |
Group or cluster | Pegasus I[4] |
Apparent magnitude (V) | 13.9[5] |
Characteristics | |
Type | Sbc[6] |
Size | 24 kly (7.5 kpc)[6] |
Apparent size (V) | 1′.047 × 0′.356[1] (NIR) |
Other designations | |
UGC 12442,[5] PGC 70786[5] |
This object forms a pair with the nearly edge-on barred spiral galaxy NGC 7541, and the two show signs of interaction. NGC 7537 has a curved tidal tail to the northeast with a length of 23 kly (6.9 kpc), while NGC 7541 has two tidal tails. They have a projected separation of 140 kly (44 kpc).[6]
A Type II supernova[9] designated SN 2002gd was detected by multiple independent observers beginning October 5, 2002. It was positioned 34″ east and 8″ north of the galactic nucleus of NGC 7537.[10]