NGC 3842

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NGC 3842
SDSS NGC 3842.jpg
SDSS image of NGC 3842. The small galaxy at the top of the image is NGC 3841.
Observation data (J2000 epoch)
Right ascension 11h 44m 02.2s[1]
Declination19° 56′ 59.3″[1]
Redshift0.021068 ± 0.000031[1]
Helio radial velocity6316 ± 9 km/s[1]
Distance325 Mly (99.6 Mpc)
Group or clusterLeo Cluster
Apparent magnitude (V)12.78[1]
Apparent size (V)1.4 x 1.0[1]
Notable featuresbrightest member of the Leo Cluster, has a 9.7 billion solar mass black hole
Other designations
UGC 6704, PGC 36487, MCG 3-30-72, ZWG 97.95,[1]

NGC 3842 is an elliptical galaxy in the constellation of Leo. It was discovered by William Herschel. It is notable for containing one of the largest black holes ever detected, reported to have a mass of 9.7 billion solar masses.[2] It is around 330 million light-years distant from Earth.

NGC 3842 is the brightest member[3] of the Leo Cluster.[4][5]


  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 3842. Retrieved 2011-12-05.
  2. ^ Rincon, Paul (2011-12-05). "Team sees biggest black holes yet". Retrieved 2011-12-05.
  3. ^ "NGC 3842". Retrieved 2018-04-19.
  4. ^ "Are You Ready, Willing, and Abell? - Sky & Telescope". Sky & Telescope. 2017-04-26. Retrieved 2018-04-19.
  5. ^ "Record massive black holes discovered lurking in monster galaxies". Berkeley News. 2011-12-05. Retrieved 2018-04-19.

External links[edit]

  • Media related to NGC 3842 at Wikimedia Commons

Coordinates: Sky map 11h 40m 44.2s, +22° 25′ 46″