Deep Sky Object in Spring
NGC4939 (Galaxy in Virgo)


Date & Time: Mar 9 2024, from 25:04 to 25:59 JST(+0900)
Composed 10 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression 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


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
Distance118 million light yrs.
Group of Galaxies -
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

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