Deep Sky Object in Spring
NGC3981 (Galaxy in Crater)

Date & Time: Jan 24 2015, from 28:03 to 28:47 JST(+0900)
Composed 8 shots with 6 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & 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)

NGC3981 / Galaxy, type SA(rs)bc
R.A.11h 56m 07.2s (2000.0)
Dec.-19°53' 46" (2000.0)
Apparent Size5.2×2.3'
Radial Velocity+1715km/s
Distance80 million light yrs.
Group of GalaxiesNGC4038 Group
Other IDsUGCA 255, ESO 572-20
Arp 289, MCG -3-31-1
IRAS 11535-1937, PGC 37496
At the eastern edge of the Crater, you can find out a small galaxy of NGC3981 at the border line with the Corvus. The galaxy has a shape being elongated in north-south direction and two clear arms stretched, has a long axis of about a bit longer than 5 arc minutes. Images captured with larger-telescopes can show us that the galaxy has dimmed nebula-like structures surrounding. NGC3981 is lying at about 80 million light years away and forming a small-scaled galaxy group with the "Antennae" colliding galaxy pair positioned at about 1.5 degrees northeast in Corvus.



Copyright(c) 2015 by Naoyuki Kurita, All rights reserved.
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