Deep Sky Object in Spring
Around Abell 1616 (Galaxy Cluster & Galaxies in Ursa Major)


Date & Time: Mar 21 2020, from 21:03 to 23:02 JST(+0900)
Mosaic of 2 flames of 10 shots composed 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 1616 / Galaxy Cluster, type 0 4 II-III
R.A.12h 47m 36.0s (2000.0)
Dec.+55°02' 00" (2000.0)
Apparent Size19.0'
# of Galaxies39
Red ShiftN/A
Magnitude16.0
DistanceN/A
Supergalactic clusterN/A
This image shows you a small galaxy cluster and surrounding minor galaxies at 1.5 degrees southwest from epsilon Uma (Alioth) forming the Big Dipper in Ursa Major.
Abell 1616 contains about 40 member galaxies in a span of 19 arc minutes. Individual members have no IDs; it's considered that the cluster is floating at comparatively distant deep space.
You can detect several small galaxies around southwest of Abell 1616. Comparatively ones have IDs of NGC4669, NGC4675, NGC4686, and so on. However even NGC4686 in the lower edge of view has a long axis of at most 2.2 arc minutes.



Abell 569
Coma Cluster

Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
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