| NGC 517 | |
|---|---|
 | |
| Observation data (J2000[1]epoch) | |
| Constellation | Pisces[2] |
| Right ascension | 01h 24m 43.8s[3] |
| Declination | +33° 25′ 46″[3] |
| Redshift | 0.014003 ± 0.000193[1] |
| Heliocentric radial velocity | (4169 ± 58) km/s[1] |
| Distance | 188Mly[4] |
| Apparent magnitude (V) | 12.5[2] |
| Apparent magnitude (B) | 13.5[2] |
| Characteristics | |
| Type | S0[2] |
| Apparent size (V) | 1.4' × 0.5'[2] |
| Other designations | |
| PGC 5214,UGC 960,GC 301,MGC +05-04-054,2MASS J01244381+3325465,h 114[1][5] | |
NGC 517, also occasionally referred to asPGC 5214 orUGC 960, is alenticular galaxy located approximately 188 million light-years from theSolar System[4] in the constellationPisces.[2] It was discovered on 13 September 1784 byastronomerWilliam Herschel.[5]
Herschel discovered the object along withNGC 515 usingBeta Andromedae as a reference star. He described his discovery as "two, both stellar", indicating his misidentification of the object as a star. While Herschel only noted one position about 35" east of NGC 515,Heinrich d'Arrest made the first accurate measurement of the object, using observation data of three separate nights.[6] The object was also observed byJohn Herschel, son of William Herschel and later catalogued byJohn Louis Emil Dreyer in theNew General Catalogue, where the galaxy was described as "pretty faint, round, stellar, southeastern of 2" with the other one being NGC 515.[5]
The galaxy has anapparent visual magnitude of 12.5 and can be classified as type S0 using theHubble Sequence.[2] The object's distance of roughly 190 million light-years from the Solar System can be estimated using itsredshift andHubble's law.[4]
