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
HCGNGCSizeMagnitudeType
HCG61ANGC41692.3×1.2'13.2S0
HCG61BNGC41705.0×0.7'13.6SBd:
HCG61CNGC41751.8×0.4'14.2S
HCG61DNGC41741.1×0.5'14.3S?
Abell 1495 / Galaxy cluster, type 2 5 III
R.A.12h 13m 24.0s (2000.0)
Dec.+29°14' 00" (2000.0)
Apparent Size16.8'
# of Galaxies123
Red ShiftN/A
Magnitude17.0
Distance2 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

NGC4214


Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
To top page To Deepsky in Spring index Coma Berenices