Norma Cluster

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Norma Cluster
View Towards the Great Attractor.jpg
Centre of the cluster with Milky Way stars in the foreground. Giant galaxies ESO 137-8 and ESO 137-6 are visible to the left.
Observation data (Epoch J2000)
Constellation(s) Norma
Right ascension 16h 15m 32.8s[1]
Declination −60° 54′ 30″[1]
Richness class 1[2]
Bautz-Morgan classification I [2]
Redshift 0.01570 (4 707 km/s)[1]
67.8 Mpc (221.1 Mly) h−1
Binding mass 1015[3] M
X-ray flux 10 mCrab[3]
Other designations
Abell 3627[1]
See also: Galaxy groups, Galaxy clusters, List of galaxy clusters

The Norma Cluster (ACO 3627 or Abell 3627) is a rich cluster of galaxies located near the center of the Great Attractor and is about 68 Mpc (222 Mly) distant.[4][5] Although it is both nearby and bright, it is difficult to observe because it is located in the Zone of Avoidance, a region near the plane of the Milky Way. Consequently, the cluster is severely obscured by interstellar dust at optical wavelengths. Its mass is estimated to be on the order of 1015 solar masses.[3]

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Coordinates: Sky map 16h 15m 32.8s, −60° 54′ 30″