NGC 1721

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
Galaxy group in Eridanus showing NGC 1721, NGC 1723, NGC 1725, and NGC 1728
Observation data (J2000 epoch)
ConstellationEridanus
Right ascension 04h 59m 17.4s[1]
Declination−11° 07′ 07″ [1]
Redshift0.015010 [1]
Helio radial velocity4 500 ± 9 km/s [1]
Galactocentric velocity4 388 ± 10 km/s [1]
Distance200 Mly (61.3 Mpc) h−1
0.73 [1]
Characteristics
Apparent size (V)36.92 by 17.58 kpc [1]

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
  1. "NED results for object NGC 1721". NASA/IPAC Extragalactic Database (NED). Retrieved March 15, 2012.
  2. "cseligman.com".
  3. "NGC 1723 Group". DeepSkyPedia.
  4. "Observations of nebulae with the 36-inch refractor of the Lick Observatory – by S. W. Burnham (Publications of the Lick Observatory)". Bibcode:1894PLicO...2..168B. Cite journal requires |journal= (help)
  • Media related to NGC 1721 at Wikimedia Commons



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