Deep Sky Object in Winter
UGC3697 (Galaxy in Camelopardalis)

Date & Time: Dec 12 2009, from 26:27 to 27:28 JST(+0900)
Composed 6 shots with 12 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

UGC3697 / Galaxy, type Sd: pec
R.A.07h 11m 21.4s (2000.0)
Dec.+71° 50' 11" (2000.0)
Apparent Size3.3×0.5'
Radial Velocity+3143km/s
Distance140 million light yrs.
Group of Galaxies -
Other IDsCGCG 330-26, MCG +12-7-28
IRAS 7055+7155, PGC 20348
UGC3697, positioned in central region of Camelopardalis, is a small but unique-shaped galaxy. The galaxy has a nickname of "Integral Sign Galaxy", clearly we can understand reason of the name. It's not striking because the galaxy has a long axis of 3 arc minutes and 13th magnitude in brightness, but comparatively known from its peculiar shape.
Although it's not clear what made the galaxy's disk warped, one of hypotheses says the gravitational interaction caused by collision with a companion galaxy is reason of this unique shape. UGC 3697 is lying about 140 millions light years away.



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