Deep Sky Object in Spring
NGC4157 (Galaxy in Ursa Major)


Date & Time: Jan 15 2016, from 25:00 to 26:12 JST(+0900)
Composed 8 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium UV/IR cut filter
Auto-guided with Meade LX200 Eqatorial & Pictor 201XT
Digital Camera: Canon EOS 600D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
CCD Sensitivity...ISO1600


NGC4157 / Galaxy, type SAB(s)b? sp II
R.A.12h 11m 4.8s (2000.0)
Dec.+50° 29' 10" (2000.0)
Apparent Size6.8×1.4'
Radial Velocity967km/s
Magnitude11.8
Distance70 million light yrs.
Group of GalaxiesUrsa Major N Group
Other IDsUGC7183, MCG9-20-106
CGCG269-38, PGC38795
NGC4157 is an edge-on galaxy in the constellation of Ursa Major. You can find out uncountable small galaxies in this star field, it's difficult to identify individuals. You can catch this minor one around midway of M109 and M106, two major galaxies with Messier's ID.
The galaxy has an apparent size of 6×1 arc minutes and fainter than 12th magnitude. This image shows you a very inconspicuous central nucleus.



NGC4145, NGC4151
Around HCG61 & Abell 1495

Copyright(c) 2016 by Naoyuki Kurita, All rights reserved.
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