Deep Sky Object in Spring
Abell 1142 (Galaxy Cluster in Leo)


Date & Time: Jan 10 2021, from 27:03 to 28:09 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 1142 / Galaxy Cluster, type 0 3 II-III
R.A.11h 00m 54.0s (2000.0)
Dec.+10°32' 00" (2000.0)
Apparent Size16.8'
# of Galaxies35
Red Shift0.0337
Magnitude15.4
Distance465 million light yrs.
Galactic superclusterLeo Supercluster
In the southern region of Leo, a galaxy cluster of Abell 1142 positions at 6 degrees southwest of theta Leonis. The cluster has s size of a bit smaller than 17 arc minutes and contains about 35 member galaxies. Two 14th magnitude galaxies of NGC3492 and IC664 are by far the largest in the members; other galaxies look like only grains of rice. Abell 1142 is one of galaxy clusters forming the Leo super galaxy cluster lying around 450 million light years away.



Abell 754
Abell 1367

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