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)|
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.
|IC443 / Supernova Remnant, type 0 E|
|R.A.||06h 16m 54.0s (2000.0)|
|Dec.||+22° 46' 00" (2000.0)|
|Real Size||25 light yrs.|
|Distance||4900 light yrs.|
|Other IDs||LBN844, Sh2-248|
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.
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