Deep Sky Object in Summer
Abell2197 (Galaxy Cluster in Hercules)


Date & Time: May 4 2019, from 24:36 to 25:18 JST(+0900)
Composed 8 shots with 6 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 & Lacerta M-GEN
Digital Camera: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(3056×3056)
Device Size...20×20mm, Sensitivity...ISO4000


Abell 2197 / Galaxy Cluster, type 1 1 III
R.A.16h 28m (rough position)
Dec.+40°54' (rough position)
Apparent Size89.6'
# of Galaxies73
Red shift0.03
Magnitude13.9
Distance420 million light yrs.
Supergalactic clusterHercules supercluster
A medium-scaled galaxy cluster of Abell 2197 is lying at about 4 degrees northwest of eta Her. The cluster is paralleling with Abell 2199 in south direction with an interval of 1.5 degrees. Abell 2197 contains 70 or more member galaxies in a span of about 1.5 degrees; two principal 13th or 14th magnitude galaxies of NGC6173 and NGC6160 is paralleling in east west direction. The cluster configures the Hercules supergalaxy cluster with Abell 2199 and the Hercules cluster (Abell 2151). The distance has been estimated about 420 million light years.
Numbers with 4 digits represent NGC #

⇒Jump to wide-field around Abell2197 & Abell2199(234KB)



Abell2162
Abell2199

Copyright(c) 2019 by Naoyuki Kurita, All rights reserved.
To top page To Deepsky in Summer index Hercules