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)
CCD Sensitivity...ISO3200

Abell 2061 / Galaxy Cluster, type 1 4 III
R.A.15h 21m 18.0s (2000.0)
Dec.+30° 39' 00" (2000.0)
Apparent Size20.2'
# of Galaxies71
Red Shift0.0772
Distance1.035 billion light yrs.
Supergalactic clusterCorona Supergalactic cluster
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.


Corona Cluster(Abell2065)

Copyright(c) 2011 by Naoyuki Kurita, All rights reserved.
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