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NGC 20

From Wikipedia, the free encyclopedia
Lenticular galaxy in the Andromeda constellation
NGC 20
NGC 20
NGC 202MASS (infrared)
Observation data
ConstellationAndromeda
Right ascension00h 09m 32.8s[1]
Declination+33° 18′ 31″[1]
Redshift0.016581[2]
Heliocentric radial velocity4971 ± 49km/s[2]
Apparent magnitude (V)14.04[1]
Characteristics
TypeLenticular
Other designations
NGC 6,NGC 20,UGC 00084,CGCG 498-082,CGCG 499-054,CGCG 0006.9+3303,MCG +05-01-036,2MASX J00093270+3318310,2MASXi J0009327+331831,USGC U008 NED04, MAPS-PP O_1257_0037278,PGC 000679,UZC J000932.7+331831,LGG 001:G93 008

NGC 20 (also known asNGC 6) is alenticular galaxy in theconstellation ofAndromeda.

The double name of the galaxy is due to the history of its discoveries: for the first time it was discovered on September 18,1857, by Irish astronomerR. J. Mitchell, an assistant toWilliam Parsons, Lord Rosse; however, the information was not published untilLawrence Parsons, the son of W. Parsons, did so in 1880. Consequently, the galaxy was independently rediscovered byHerman Schultz on October 16, 1866, and byLewis Swift in 1885. As a result,J. L. E. Dreyer cataloged it twice in theNew General Catalogue, as NGC 6 (from Swift's observation) and NGC 20 (from Lord Rosse's).[3]

NGC 7831 Group

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According to A.M. Garcia, NGC 20 is a member of theNGC 7831 group (also known asLGG 1), which contains at least 18 galaxies, includingNGC 13,NGC 19,NGC 21,NGC 39NGC 43,NGC 7805,NGC 7806,NGC 7819, andNGC 7836.[4]

See also

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References

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  1. ^abc"NGC 20".SIMBAD. Retrieved2025-06-24.
  2. ^ab"NASA/IPAC Extragalactic Database".Results for NGC 0020. Retrieved2010-05-05.
  3. ^Steinicke, W. (2010).Observing and Cataloguing Nebulae and Star Clusters: From Herschel to Dreyer's New General Catalogue. Cambridge University Press. pp. 288–289,301–302.ISBN 978-1-139-49010-8. Retrieved2025-06-24.
  4. ^Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups".Astronomy and Astrophysics Supplement Series.100: 47.Bibcode:1993A&AS..100...47G.

External links

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External links

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  • Media related toNGC 6 at Wikimedia Commons
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