Around HCG61(The Box) & Abell 1495

Deep Sky Object in Spring

Around HCG61 (The Box) & Abell 1495
(Compact Galaxy Group & Galaxy Cluster in Coma Berenices)

Date & Time:	Jan 3 2020, from 28:00 to 29:06 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

**Member galaxies of HCG61**
HCG	NGC	Size	Magnitude	Type
HCG61A	NGC4169	2.3×1.2'	13.2	S0
HCG61B	NGC4170	5.0×0.7'	13.6	SBd:
HCG61C	NGC4175	1.8×0.4'	14.2	S
HCG61D	NGC4174	1.1×0.5'	14.3	S?

Abell 1495 / Galaxy cluster, type 2 5 III
R.A.	12h 13m 24.0s (2000.0)
Dec.	+29°14' 00" (2000.0)
Apparent Size	16.8'
# of Galaxies	123
Red Shift	N/A
Magnitude	17.0
Distance	2 billion light yrs.
Supergalactic cluster	-

In the northwest region of Coma Berenices, this image captured a unique-shaped compact galaxy group and a dimmed galaxy cluster just east of it in a single flame.
Four small galaxies registered as Hickson's Compact Group 61 (HCG61) are forming seemingly a distorted square, nicknamed "The Box". Actually only NGC4170 (HCG61B) is located about 50 million light years away, floating much closer than other three galaxies (170 million light years).
You can detect a galaxy cluster Abell 1495 including about 120 faint members only 10 arc minutes east side of the HCG61. The cluster is located at 200 million light years away, over-ten times farther than HCG61.

NGC4157

NGC4183

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