Deep Sky Object in Autumn
IC298 (Arp 147, Colliding Galaxies in Cetus)


Date & Time: Dec 3 2021, from 20:56 to 21:51 JST(+0900)
Composed 10 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(2040×2040)
Device Size...10×10mm
Sensitivity...ISO4000, White Balance...Daylight


IC298 / Galaxy, type Ring A
R.A.03h 11m 18.4s (2000.0)
Dec.+01°18' 57" (2000.0)
Apparent Size0.5×0.4'
Radial Velocity+9656km/s
Magnitude14.3
Distance430 millions light yrs.
Group of Galaxies -
Other IDsCGCG 390-16, Arp 147
MCG +0-9-15, PGC 11890
This image shows an indistinct but unique-shaped colliding galaxy pair positioned at 3.6 degrees southeast of alpha Ceti (Menkar). A ring-shaped IC298 has a size of 0.5 arc minutes and another one next to the east is IC298A as a collided companion. Both have brightness of at most 14th or 15th magnitude, not subjects to amateur's observation. The distance has been estimated as approx. 430 million light years.



Around IC284
IC342

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