NGC 1721

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NGC 1721
Galaxy group in Eridanus (NGC 1721, NGC 1723, NGC 1725, and NGC 1728).jpg
Galaxy group in Eridanus showing NGC 1721, NGC 1723, NGC 1725, and NGC 1728
Observation data (J2000 epoch)
Constellation Eridanus
Right ascension 04h 59m 17.4s[1]
Declination −11° 07′ 07″ [1]
Redshift 0.015010 [1]
Helio radial velocity 4 500 ± 9 km/s [1]
Galactocentric velocity 4 388 ± 10 km/s [1]
Distance 200 Mly (61.3 Mpc) h−1
0.73
[1]
Characteristics
Apparent size (V) 36.92 by 17.58 kpc [1]
See also: Galaxy, List of galaxies

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]

References[edit]

Coordinates: Sky map 04h 59m 17.4s, −11° 07′ 07″