Deep Sky Object in Spring
NGC4939 (Galaxy in Virgo)


Date & Time: Feb 18 2010, from 26:01 to 26:54 JST(+0900)
Composed 6 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1760mm, F7.1)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D50 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)
CCD Sensitivity...ISO1600




NGC4939 / Galaxy, type SA(s)bc I-II
R.A.13h 04m 14.3s (2000.0)
Dec.-10° 20' 24" (2000.0)
Apparent Size5.8×3.7'
Radial Velocity+3091km/s
Magnitude11.9
Distance55 million light yrs.
Group of GalaxiesVirgo Cluster
Other IDsMCG -2-33-104, PGC 45170
In southern part of Virgo, NGC4939 is positioned at 5 degrees west of Spica. The galaxy has a size of about 6-by-4 arc minutes, and can be detected two clear arms wound up loosely. A visual brightness can be estimated about 12th magnitude.




NGC4866

Around NGC4958


Copyright(c) 2010 by Naoyuki Kurita, All rights reserved.
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