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Galaxy in the constellation Pisces From Wikipedia, the free encyclopedia
NGC 508, also occasionally referred to as PGC 5099 or UGC 939, is an elliptical galaxy in the constellation Pisces.[2] It is located approximately 247 million light-years from the Solar System[4] and was discovered on 12 September 1784 by British astronomer William Herschel.[5] [6]
NGC 508 | |
---|---|
Observation data (J2000[1] epoch) | |
Constellation | Pisces[2] |
Right ascension | 01h 23m 40.6s[3] |
Declination | +33° 16′ 49″[3] |
Redshift | 0.01835 ± 0.00007[1] |
Heliocentric radial velocity | (5451 ± 21) km/s[1] |
Distance | 247 Mly[4] |
Apparent magnitude (V) | 13.1[2] |
Apparent magnitude (B) | 14.1[2] |
Characteristics | |
Type | E[2] |
Apparent size (V) | 1.1' × 1.1'[2] |
Other designations | |
PGC 5099, UGC 939, GC 295, MGC +05-04-045, 2MASS J01234058+3316502 [1][5] |
Herschel discovered NGC 508 along with NGC 507 and described the objects as "Two. Both eF, S, but unequal.". His observed position was catalogued and is accurate.[6] John Louis Emil Dreyer, creator of the New General Catalogue, described the galaxy as "very faint, small, northern of two", with the other object being NGC 507.[5]
The galaxy has an apparent size of 1.1 × 1.1 arcmins and a recessional velocity of 5525 kilometers per second. It is thought to be a group member with NGC 507, but as there is no evidence of interaction between the objects, the two are not necessarily a physical pair. Although NGC 508 is usually treated as part of Arp 229, the description of the Arp-galaxy only applies to the larger NGC 507. Therefore, the term Arp 229 should only be used as an alternative designation for NGC 507.[5]
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