NGC 687 is a lenticular galaxy located 220 million light-years away[2] in the constellation Andromeda. It was discovered by astronomer William Herschel on September 21, 1786[3] and is a member of Abell 262.[4][5][6][7]

See also

References

  1. ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for NGC 687. Retrieved 2018-11-18.
  2. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-11-19.
  3. ^ "New General Catalog Objects: NGC 650 - 699". cseligman.com. Retrieved 2018-11-14.
  4. ^ M., Garcia, A. (July 1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G. ISSN 0365-0138.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ^ Giuricin, Giuliano; Marinoni, Christian; Ceriani, Lorenzo; Pisani, Armando (November 2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". The Astrophysical Journal. 543 (1): 178–194. arXiv:astro-ph/0001140. Bibcode:2000ApJ...543..178G. doi:10.1086/317070. ISSN 0004-637X. S2CID 9618325.
  6. ^ "Detailed Object Classifications". ned.ipac.caltech.edu. Retrieved 2018-11-19.
  7. ^ "NGC 687". Retrieved 2018-11-20.
Allikas: https://en.wikipedia.org/wiki/NGC_687
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