The Hydra Cluster – 157 Galaxies in a pocket

The Hydra Cluster (or Abell 1060) is a galaxy cluster that contains 157 bright galaxies, appearing in the constellation Hydra. The cluster spans about ten million light-years and has an unusually high proportion of dark matter. The cluster is part of the Hydra-Centaurus Supercluster located 158 million light-years from Earth. The cluster’s largest galaxies are elliptical galaxies NGC 3309 and NGC 3311 and the spiral galaxy NGC 3312 all having a diameter of about 150,000 light-years. In spite of a nearly circular appearance on the sky, there is evidence in the galaxy velocities for a clumpy, three-dimensional distribution.

Processing this dataset was a challenge due to the amount of noise in the light frames and the HUGE halo around HR4162

RA: 10h 36m 36.714s

DEC: -27° 30’ 50.396”

Size: 30.2 x 29.6 arcmin

Orientation: Up is 359 degrees E of N

Location: Hydra

Distance: 190 Mly

Number of galaxies: 157

Acquisition January 2021

Total acquisition time of 2.6 hours.

Based on data from CHI-1

Technical Details

Data acquisition: Telescope Live

Processing: Nicolas ROLLAND

Location: El Sauce Observatory, Rio Hurtado, Chile

L 2 x 300 sec

R 10 x 300 sec

G 10 x 300 sec

B 10 x 300 sec

Optics: Planewave 24“ CDK @ F5.6

CCD: FLI PL 9000

Pre Processing: CCDstack & Pixinsight

Post Processing: Photoshop CC

Autore: Nicolas Rolland (sito)