NGC 5502 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Ursa Major |
Right ascension | 14h 09m 33.9s [1] |
Declination | +60° 24′ 34.3″ [1] |
Redshift | 0.02940 [1] |
Heliocentric radial velocity | 8684 km/s [1] |
Galactocentric velocity | 8949 km/s [2] |
Distance | 400 ± 28 M
ly (122.6 ± 8.6 M pc) [2] |
Apparent magnitude (V) | 15.9 [2] |
Absolute magnitude (V) | -19.5 [nb 1] |
Characteristics | |
Type | Sa D [2] |
Apparent size (V) | 0.63' x 0.29' [2] |
Other designations | |
MCG +10-20-077, PGC 50508 [1] [3] |
NGC 5502 (also known as NGC 5503) is a spiral galaxy in the constellation of Ursa Major, [3] [4] registered in New General Catalogue (NGC). [1]
NGC 5502 was discovered by Edward Swift (father) on 9 May 1885 and later double listed by Lewis Swift (son) two days later on 11 May 1885 as NGC 5503. [3] They gave descriptions "between two stars, one a wide double" and "forms with two stars a right triangle" respectively. [4] In the New General Catalogue, John Louis Emil Dreyer described the galaxy as "most extremely faint, very small, round, very difficult, 2 stars near". [3] The apparent difference in positions (2 arcmin) could have caused the confusions between NGC 5502 and NGC 5503. [3]