Deep Sky Object in Winter
Sh2-240 (Supernova Remnant in Taurus & Auriga)

Date & Time: Nov 22 2014, from 24:44 to 25:43 JST(+0900)
Mosaic of 2 flames of 4 shots with 8min. exposed
Optical: BORG 60ED with a conversion lens (f=245mm, F4.1)
with IDAS LPS-P2-FF Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)

Sh2-240 / Supernova Remnant, type 3 E
R.A.05h 39m 6.0s (2000.0)
Dec.+28° 00' 00" (2000.0)
Apparent Size200×180'
Real Size140 light yrs.
Magnitude -
Distance2600 light yrs.
Other IDsLBN822
You can see a vast, but extraordinary faint supernova remnant of Sh2-240 (Simeis 147) between the constellations of Auriga and Taurus. The remnant has an apparent diameter of over 3 degrees.
The Sh2-240 is a remnant of supernova that exploded about 200 thousand years ago, and the nebula is extending with a terrific speed yet. Of course we cannot detect the nebula with our naked eyes. It's one of features that the nebula has fine filamentary structures, looks like a very dimmed Veil nebula in Cygnus.

To Monochrome reversed image(176KB)



Copyright(c) 2014 by Naoyuki Kurita, All rights reserved.
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