NGC 1989 (also known as ESO 423-21) is a lenticular galaxy in the Columba constellation. It is about 482 million light-years away from the Milky Way. The galaxy was discovered by John Herschel on January 28, 1835.[4] Its apparent magnitude is 12.9[2] and its size is 1.40 by 1.1 arc minutes.[3]

References

  1. ^ a b c d e f "NGC 1989 -- Brightest galaxy in a Cluster (BCG)". SIMBAD. Retrieved 25 November 2017.
  2. ^ a b c d "Galaxy NGC 1989". DSO. Archived from the original on 1 December 2017. Retrieved 25 November 2017.
  3. ^ a b "Object: NGC 1989 (*)". SEDS. Retrieved 25 November 2017.
  4. ^ "NGC 1989 (= PGC 17464)". cseligman. Retrieved 25 November 2017.
  • Media related to NGC 1989 at Wikimedia Commons


Allikas: https://en.wikipedia.org/wiki/NGC_1989
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