Deep Sky Object in Summer
The Corona Cluster (Abell 2065)

Date & Time: Mar 16 2018, from 27:09 to 28:05 JST(+0900)
Composed 12 shots with 5 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight

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) 2018 by Naoyuki Kurita, All rights reserved.
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