NGC 1721 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Eridanus |
Right ascension | 04h 59m 17.4s [1] |
Declination | −11° 07′ 07″ [1] |
Redshift | 0.015010 [1] |
Heliocentric radial velocity | 4 500 ± 9 km/s [1] |
Galactocentric velocity | 4 388 ± 10 km/s [1] |
Distance | 200 Mly (61.3 Mpc) [1] |
Characteristics | |
Type | (R')SAB00(s) [1] |
Size | 36.92 by 17.58 kpc [1] |
Other designations | |
MCG -02-13-027, PGC 16484 [1] |
NGC 1721 is a lenticular galaxy (S0) located in the constellation Eridanus. It was discovered on the 10th of Nov 1885 [2] by Edward Emerson Barnard. This galaxy is a member of the NGC 1723 Group—consisting of NCG 1723 (the brightest member, 11.7- mag) and a close triplet of NGC 1721, NGC 1725 and NGC 1728. [3]
NGC 1721 is a Dreyer Object (a now archaic astronomical term), meaning that it was included in the original New General Catalogue by JLE Dreyer. [4]