Constellation tour in Winter
Canis Major (The Great Dog)

Date & Time: Dec 28 2008, 26:08 JST(+0900), 20min. Exp.
Optical: SMC TAKUMAR f=105mm F2.4, Aperture: F4.0, with Kenko PRO-Softon[A] filter
Auto-guided with TAKAHASHI EM-200 Equatorial
Camera: PENTAX 67
Film: Ektachrome E200 (+1EV pushed)
Location: Ooizumi, Hokuto-city, Yamanashi pref.

ASCII/Astroarts StellaNavigator
The master of constellations in winter skies is Orion, and perhaps you'll agree that the master of stars should be alpha Canis Majoris, Sirius. The brightest star in heavens has the magnitude of -1.5, certainly it's no giant at an estimated 1.5 Sun diameters. Its brightness of worthy of special mention comes from the fact that the star is very close to our system at 8.6 light years away.
In ancient Egypt, the appearance of Sirius in the eastern dawn sky was considered that indicates a flood of the Nile River, the observation of Sirius was important affair for farmers.
The name of Sirius comes from the Greek meaning "scorching", because the ancient Greek had believed that the season of hot summer was caused when the Sun and Sirius lined up. It's surely that the right ascension of Sirius is near to that of the summer solstice.

Guide for Deep Sky Objects

M41 .....Open Cluster 4 degrees South of Sirius, 2470 ly. away
NGC2207 & IC2163 .....Small colliding galactic pair in western field.
NGC2217 .....Barred face-on galaxy with a outer ring in SW region, 65 million ly away
Around NGC2354 .....Open cluster 1.5 degree East of delta CMa with a size of 20 arc minutes
NGC2362 .....Small and dense open cluster about 2.7 deg. east of delta CMa
Duck Nebula(NGC2359) .....Compact diffused nebula at 9deg. NE of Sirius.
Sh2-301 .....Small diffused nebula 5deg. ESE of Sirius.

Eridanus & Fornax


Copyright(c) 2009 by Naoyuki Kurita, All rights reserved.
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