Deep Sky Object in Winter
Around IC426 (Reflection Nebula in Orion)

Date & Time: Nov 12, 2004, from 27:14 to 27:32 JST(+0900)
Composed 4 shots with 5 minutes exposed
Optical: TAKAHASHI 12.5cm(4.9") fluorite refractor (f=1000mm, F8.0)
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Fujifilm FinePix S2 Pro
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto

This shot has captured a star field just 1 degree east of Mintaka, the western star of Orion's belt. You can see some of dimmed reflection nebulae here. A round one upper left hand side is IC426, and you can see IC423 in lower right hand side. Another small one just above IC423 has a number of IC424. Both IC426 and IC423 have apparent diameter of about 5 arc minutes, only telephoto lenses can take those.
This star field is about central region of the Orion Association that is rich in inter-stellar gaseous matter. Those reflection nebulae are reflecting bright light of stars of Orion's belt. If those nebulosities were positioned closer to bright stars, we could appreciate them as colorful diffused nebulae like the Great Orion Nebula or the Horse head Nebula.

IC423 / Reflection Nebula, type 2 R
R.A.05h 33m 24.0s (2000.0)
Dec.-00° 37' 00" (2000.0)
Apparent Size6.0'
Real Size2.6 light yrs.
Distance1500 light yrs.
Other IDsLBN913
IC424 / Reflection Nebula, type R
R.A.05h 33m 42.0s (2000.0)
Dec.-00° 19' 00" (2000.0)
Apparent Size2'
Real Size0.9 light yrs.
Distance1500 light yrs.
IC426 / Reflection Nebula, type 2 R
R.A.05h 36m 48.0s (2000.0)
Dec.-00° 15' 00" (2000.0)
Apparent Size5.0'
Real Size2.2 light yrs.
Distance1500 light yrs.
Other IDsLBN921



Copyright(c) 2004 by Naoyuki Kurita, All rights reserved.
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