| NGC 504 | |
|---|---|
 SDSS view of NGC 504 | |
| Observation data (J2000[1]epoch) | |
| Constellation | Pisces[2] |
| Right ascension | 01h 23m 27.9s[3] |
| Declination | +33° 12′ 16″[3] |
| Redshift | 0.014096 ± 0.000270[1] |
| Heliocentric radial velocity | (4196 ± 81) km/s[1] |
| Distance | 189Mly[4] |
| Apparent magnitude (V) | 13.0[2] |
| Apparent magnitude (B) | 14.0[2] |
| Characteristics | |
| Type | S0[2] |
| Apparent size (V) | 1.7' × 0.4'[2] |
| Other designations | |
| PGC 5084,UGC 935,GC 291,GC 292,MGC +05-04-041,2MASS J01232787+3312152,h 107[1][5] | |
NGC 504, also occasionally referred to asPGC 5084 orUGC 935, is alenticular galaxy located approximately 189 million light-years from theSolar System[4] in the constellationPisces.[2] It was discovered on 22 November 1827 byastronomerJohn Herschel. The object was listed twice in theGeneral Catalogue, precursor of theNew General Catalogue, as both GC 291 and GC 292.[5]
Herschel discovered the object without recording a visual description. However, he noted the nebula "precedesNGC 507 by about 10 seconds and is half a field to the south of it". NGC 504 was later also independently discovered byHeinrich d'Arrest, using an 11"reflecting telescope inCopenhagen and assuming the object was new. This led to Herschel cataloguing the two observations separately as GC 291 and GC 292.[6] The objects were later combined byJohn Louis Emil Dreyer with the creation of the New General Catalogue, in which the galaxy was described as "very faint, small".[5]
