Deep Sky Object in Summer
Corona Cluster (Abell 2065)

Date & Time: Mar 8 2008, from 25:37 to 26:36 JST(+0900)
Composed 6 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1760mm, F6.9)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D80 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3872×2592)
CCD Sensitivity...ISO1600

Abell 2065 / Galaxy Cluster, type 2 3 III
R.A.15h 23m (rough position)
Dec.+27° 43' (rough position)
Apparent Size22.4'
# of Galaxies109
Red Shift0.0721
Distance860 million light yrs.
Supergalactic ClusterCorona Supergalactic cluster
It's a very deep sky object of galactic cluster hidden in western Corona Borealis. Several indistinct light spots in center of this picture are individual member galaxies. It's recognized about 100 galaxies are included in span of 10 arc minutes. The cluster is about 860 million light years away and has a visual brightness of 15th magnitude.

To image without stars


Hercules Cluster(Abell2151)

Copyright(c) 2008 by Naoyuki Kurita, All rights reserved.
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