Deep Sky Object in Summer
Abell 2061 (Galaxy Cluster in Corona Borealis)
|Date & Time: ||Jan 29 2011, from 27:45 to 28:26 JST(+0900)
|Composed 5shots with 10 minutes exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain (f=2500mm, F10.0)
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Nikon D700
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(2784×1848)|
|Device Size...DX Format (24×16mm)|
A small-scaled galaxy cluster in northwest edge of Corona Borealis is Abell 2061,
includes about 70 member galaxies in span of 20 arc minutes.
The cluster is positioned at about 3 degrees north of the Corona Borealis Cluster (Abell 2065),
another principal of Corona Borealis supercluster with Abell 2065.
The brightest galaxy in the cluster is CGCG165-41 in center with brightness of 15.6th magnitude,
the distance has been estimated about 1.035 billion light years.
|Abell 2061 / Galaxy Cluster, type 1 4 III|
|R.A.||15h 21m 18.0s (2000.0)|
|Dec.||+30° 39' 00" (2000.0)|
|# of Galaxies||71|
|Distance||1.035 billion light yrs.|
|Supergalactic cluster||Corona Supergalactic cluster|