JKCS 041

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Tour of JKCS041.

JKCS 041 is a group of galaxies with the distinction of being the farthest away group from Earth ever observed, as of 2009.[1] It is estimated to be 9.9 billion light years away,[2] seen at redshift 1.9.[3] The cluster is located in the constellation Cetus at a photometrically determined redshift of z=1.9 at right ascension 2h 26m 44s declination −04° 41′ 37″ (J2000.0).[4] There are at least 19 members to the cluster.[2]

See also[edit]


  1. ^ "'Most distant' galaxy group spied". BBC News. 22 October 2009. Retrieved 2009-10-28. 
  2. ^ a b Carnegie Institution (21 May 2014). "Very distant galaxy cluster confirmed". Science Daily. 
  3. ^ "JKCS041: The Farthest Galaxy Cluster Yet Measured". Astronomy Picture of the Day. NASA. 28 October 2009. Retrieved 2009-10-28. 
  4. ^ Andreon S, Maughan B, Trinchieri G, Kurk J (November 2009). "JKCS 041: a colour-detected galaxy cluster at zphot~1.9 with deep potential well as confirmed by X-ray data". Astronomy & Astrophysics 507 (1): 147–157. arXiv:0812.1699. Bibcode:2009A&A...507..147A. doi:10.1051/0004-6361/200912299.