NGC 4540 is a spiral galaxy with type 1 Seyfert activity[3] located about 64 million light-years away[4] in the constellation Coma Berenices.[5] NGC 4540 was discovered by astronomer William Herschel on March 21, 1784[6] and is a member of the Virgo Cluster.[7][8]

See also

NGC 4540 (SDSS DR14)

References

  1. ^ a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 4540. Retrieved 2018-01-04.
  2. ^ "parsecs to lightyears conversion". Retrieved 2017-09-30.
  3. ^ Normandin, George P. "Galaxies IC 3528 and NGC 4540, Supernova 2001z". www.kopernik.org. Retrieved 2018-01-05.
  4. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-01-05.
  5. ^ "Revised NGC Data for NGC 4540". spider.seds.org. Retrieved 2018-01-05.
  6. ^ "New General Catalog Objects: NGC 4500 - 4549". cseligman.com. Retrieved 2018-01-05.
  7. ^ "The Virgo Cluster". www.atlasoftheuniverse.com. Retrieved 2018-01-05.
  8. ^ "Detailed Object Classifications". ned.ipac.caltech.edu. Retrieved 2018-01-05.



Allikas: https://en.wikipedia.org/wiki/NGC_4540
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