Deep Sky Object in Autumn
Abell 2634 (Galaxy Cluster in Pegasus)


Date & Time: Jan 9 2021, from 18:25 to 19:32 JST(+0900)
Composed 12 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: 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 2634 / Galaxy Cluster, type 1 1 II:
R.A.23h 38m 18.0s (2000.0)
Dec.+27°01' 00" (2000.0)
Apparent Size22.4'
# of galaxies52
Red ShiftN/A
Magnitude13.8
Distance470 million light yrs.
Galactic supercluster -
In the Pegasus's square, a galaxy cluster Abell 2634 positions at 7.7 degrees east of β Peg. The cluster is floating at about 450 million light years away, contains about 50 galaxies within a span of 22 arc minutes. A giant elliptical galaxy of NGC7720 in the center is eye-catching. The galaxy has an apparent diameter of a bit smaller than 2 arc minutes and a brightness of 12th magnitude.
Numbers with 4 digits represent NGC #



Perseus I Cluster(Abell 426)
HCG10

Copyright(c) 2021 by Naoyuki Kurita, All rights reserved.
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