Deep Sky Object in Spring
NGC2403 (Galaxy in Cameropardalis)

Date & Time: Nov 29 2013, from 25:17 to 26:01 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 & Meade 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...ISO3200

NGC2403 / Galaxy, type SAB(s)cd III
R.A.07h 36m 54.5s (2000.0)
Dec.+65° 35' 58" (2000.0)
Apparent Size21.9×12.3'
Radial Velocity+226km/s
Distance11.8 million light yrs.
Group of GalaxiesNGC2403 Group
Other IDsUGC3918, MCG11-10-7,
CGCG309-40, PGC21396
NGC2403 is a galaxy 8 degrees north-west of omicron UMa that marks the nose of the Big Bear. The galaxy is positioned in a minor constellation of Cameropardalis (The Giraffe); so it's hardly be paid attention, but has sufficient size and visual magnitude worthy of being registered in Messier's catalogue. It has an extent of 22 arc minutes in east-west direction and 12 arc minutes in north-south, and has magnitude of about 9.
NGC2403 is a typical face-on galaxy, and looks like a shrinked M33, a famous and splendid galaxy in Triangulum.
It's estimated that NGC2403 is lying about 12 million light years away.


NGC2444, NGC2445(Arp 143)

Copyright(c) 2013 by Naoyuki Kurita, All rights reserved.
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