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NGC 21

From Wikipedia, the free encyclopedia

NGC 21
NGC 21/NGC 29 (Sloan Digital Sky Survey)
Observation data (J 2000.0 epoch)
ConstellationAndromeda
Right ascension00h 10m 46.9s[1]
Declination+33° 21′ 10″[1]
Redshift0.015911[1]
Heliocentric radial velocity4770 ± 4 km/s[1]
Distance234 ± 29 Mly
(71.7 ± 8.9 Mpc)[2]
Apparent magnitude (V)+12.8
Absolute magnitude (V)-20.75[3]
Characteristics
TypeSAB(s)bc
Apparent size (V)1,2′ × 0,59′
Other designations
NGC 21, UGC 100, PGC 767.

NGC 21 (also known as NGC 29) is a spiral galaxy in the Andromeda constellation. It was discovered by William Herschel in 1790. Lewis Swift observed it again in 1885, leading to its double listing in the New General Catalogue.

NGC 21 in Infrared

References

  1. ^ a b c d "NASA/IPAC Extragalactic Database". Results for NGC 0021. Retrieved 2010-05-03.
  2. ^ "Distance Results for NGC 0021". NASA/IPAC Extragalactic Database. Retrieved 2010-05-03.
  3. ^ "The galaxy NGC 21".

External links

  •  Media related to NGC 21 at Wikimedia Commons
  • Wikisky image of NGC 29


This page was last edited on 2 June 2023, at 00:33
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