NGC 1023

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NGC 1023
NGC1023 JeffJohnson.jpg
Galaxy NGC 1023
Observation data (J2000 epoch)
Constellation Perseus
Right ascension 02h 40m 24.0s[1]
Declination +39° 03′ 48″[1]
Redshift 0.002125[1]
Helio radial velocity 637 ± 4 km/s[1]
Distance ~19 Mly (Light Travel-Time redshift-based)[1]
30 to 64 Mly (measured)[1]
Apparent magnitude (V) 10.35[1]
Type SB0[1]
Apparent size (V) 8.7' x 3.0'[1]
Other designations
UGC 2154, PGC 10123, MCG+06-06-073, Arp 135
See also: Galaxy, List of galaxies

NGC 1023 is a barred lenticular galaxy, a member of the NGC 1023 group of galaxies in the Local Supercluster. In the Catalogue of Named Galaxies, it is called Nodifera Persei, or the knot-bearing galaxy, because of its faint companion galaxy.[2] Distance measurements vary from 9.3 to 19.7 million parsecs (30 to 64 million light-years).[1]

NGC 1023 is included in Halton Arp's Atlas of Peculiar Galaxies, under the category "Galaxies with Nearby Fragments" under the number 135.[3]


  1. ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for NGC 1023. Retrieved 2012-10-17. 
  2. ^ Bodifee, Gerard. "Catalogue of One Thousand Named Galaxies" (PDF). Retrieved 21 May 2017. 
  3. ^ Arp, Halton (1966). Atlas of Peculiar Galaxies. Pasadena, California: California Institute of Technology. Retrieved 5 Jan 2010.  (webpage includes PDF link)