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NGC 70

NGC 70
NGC 70 is the spiral galaxy in the lower center of this image. The elliptical galaxies neighboring it are NGC 68 (lower) and NGC 71 (upper).
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension00h 18m 22.55s
Declination+30h 04m 43.4s
Redshift0.023907[1]
Heliocentric radial velocity7167 km/s[1]
Distance320-325 Mly[2][3]
Apparent magnitude (V)13.5[4][2]
Characteristics
TypeSb[5] Sbc[4] SA(rs)c[2]
Size180,000 ly[2]
Apparent size (V)~1.7'x1.4'[5][4][6]
Other designations
IC 1539, UGC 174, Arp 113, VV 166a, MCG +05-01-067, 2MASX J00182252+3004465, IRAS 00157+2948, PGC 1194, UZC J001822.6+300446

NGC 70 is a spiral galaxy located in the constellation Andromeda.[7] It was discovered on October 7, 1855, by R. J. Mitchell[7] and was also observed on December 19, 1897 by Guillaume Bigourdan from France who described it as "extremely faint, very small, round, between 2 faint stars".[2]

NGC 70 is a member of a compact group of seven[8] or eight[9] galaxies, sometimes called the NGC 70 Group or the VV 166 Group. The group consists of three relatively bright galaxies: 70, 71 and 72 in the NGC catalog, along with four fainter galaxies. NGC 68 appears to be a group member, but its discrepant radial velocity and lack of tidal distortion suggests that it may be an unrelated galaxy along the group's line of sight.[9] In photographs the NGC 70 group resembles the much more famous Stephan's Quintet group, and it is a popular target for amateur astrophotographers.

NGC 70 (near-infrared)

References

  1. ^ a b "NASA/IPAC Extragalactic Database - NGC 70". NED. NASA/IPAC. Retrieved 23 November 2014.
  2. ^ a b c d e Seligman, Courtney. "New General Catalog Objects: NGC 50 - 99". cseligman.com. Retrieved 23 November 2014.
  3. ^ Wright, Ned. "Ned Wright's Javascript Cosmology Calculator". www.astro.ucla.edu. UCLA. Retrieved 23 November 2014.
  4. ^ a b c "NGC 70 >> Deep Sky Object Browser". Deep Sky Objects Browser. Archived from the original on 14 May 2014. Retrieved 23 November 2014.
  5. ^ a b "NGC 70". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 November 2014.
  6. ^ "WIKISKY - NGC 70". wikisky. SKY-MAP.org. Retrieved 23 November 2014.
  7. ^ a b "NGC 70". Courtney Seligman. Retrieved 14 March 2015.
  8. ^ Hickson, P.; Richstone, D.O.; Turner, E.L. (April 1977). "Galaxy collisions in dense groups". Astrophysical Journal. 213: 323–326. Bibcode:1977ApJ...213..323H. doi:10.1086/155158. Retrieved 17 November 2020.
  9. ^ a b Kormendy, John; Sargent, Wallace L. W. (1 October 1974). "Tidal Effects As Criteria for Membership In Small Groups of Galaxies: Application to VV166". Astrophysical Journal. 193: 19–25. Bibcode:1974ApJ...193...19K. doi:10.1086/153122. Retrieved 17 November 2020.
  • Media related to NGC 70 at Wikimedia Commons


Quelle: https://en.wikipedia.org/wiki/NGC_70