NGC 502
NGC 502
SDSS view of NGC 502
Observation data (J2000[1] epoch)
ConstellationPisces[2]
Right ascension01h 22m 55.5s[3]
Declination+09° 02′ 57″[3]
Redshift0.008279 ± 0.000163[1]
Heliocentric radial velocity(2472 ± 49) km/s[1]
Distance113 Mly[4]
Apparent magnitude (V)12.7[2]
Apparent magnitude (B)13.7[2]
Characteristics
TypeS0[2]
Apparent size (V)1.1' × 1.0'[2]
Other designations
GC 293, 2MASS J01225553+0902570, UGC 922, PGC 5034 [1][5]

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]

Observation history

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 also

References

  1. 1 2 3 4 "NGC 502". Retrieved 2017-12-09.
  2. 1 2 3 4 5 6 "Revised NGC Data for NGC 502". spider.seds.org. Retrieved 2017-10-05.
  3. 1 2 "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-05.
  4. 1 2 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. 1 2 3 "New General Catalog Objects: NGC 500 - 549". cseligman.com. Retrieved 2017-10-16.
  6. 1 2 "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm".
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