NGC 502, also occasionally referred to as PGC 5034 or UGC 922, is a lenticular galaxy in the constellation Pisces.[2] It is located approximately 113 million light-years from the Solar System[4] and was discovered on 25 September 1862 by German astronomer Heinrich Louis d'Arrest.[5] When the Morphological Catalogue of Galaxies was published between 1962 and 1974, the identifications of NGC 502 and NGC 505 were reversed. In reality, NGC 502 is equal to MGC +01-04-041 and not MCG +01-04-043 as noted in the catalogue.[6]

NGC 502
NGC 502
SDSS view of NGC 502
Observation data (J2000[1] epoch)
Right ascension01h 22m 55.5s[3]
Declination+09° 02′ 57″[3]
Redshift0.008279 ± 0.000163[1]
Helio radial velocity(2472 ± 49) km/s[1]
Distance113 Mly[4]
Apparent magnitude (V)12.7[2]
Apparent magnitude (B)13.7[2]
Apparent size (V)1.1' × 1.0'[2]
Other designations
GC 293, 2MASS J01225553+0902570, UGC 922, PGC 5034 [1][5]

Observation historyEdit

Arrest discovered NGC 502 using an 11" reflecting telescope in Copenhagen. His position, which he measured on four separate nights, matches with both UGC 922 and PGC 5034.[6] John Louis Emil Dreyer, creator of the New General Catalogue, described the galaxy as "considerably bright, small, round, brighter middle and nucleus".[5]

NGC 502 (SDSS)

See alsoEdit


  1. ^ a b c d "NGC 502". Retrieved 2017-12-09.
  2. ^ a b c d e f "Revised NGC Data for NGC 502". Retrieved 2017-10-05.
  3. ^ a b "Your NED Search Results". Retrieved 2017-10-05.
  4. ^ a b An object's distance from Earth can be determined using Hubble's law: v=Ho is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=Ho
  5. ^ a b c "New General Catalog Objects: NGC 500 - 549". Retrieved 2017-10-16.
  6. ^ a b "".

External linksEdit