Deep Sky Object in Winter
IC443 (Diffused Nebula in Gemini)

Date & Time: Nov 5 2010, from 26:28 to 27:41 JST(+0900)
Mosaic of 2 flames of 4 shots composed with 10 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-V4 light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial
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

IC443 / Supernova Remnant, type 0 E
R.A.06h 16m 54.0s (2000.0)
Dec.+22° 46' 00" (2000.0)
Apparent Size27×5'
Real Size25 light yrs.
Distance4900 light yrs.
Other IDsLBN844, Sh2-248
You can see two orange stars with 3rd magnitudes paralleled in east west direction at the leg of Pollux, the shorter brother of twins. An invisible H-alpha diffused nebula of IC443 is positioned between those stars. The eastern edge of IC443 takes a loop structure, and it's considered that a supernova explosion made the shape, gaseous matter is spreading out.
The whole shape gave a nickname of "Jerry fish Nebula", enjoyed only in long-exposure films. And there is very fine reddish gas of IC444 at the east of IC443.

Jump to Monochrome enhanced image

Around IC426


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