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)|
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.
|Sh2-240 / Supernova Remnant, type 3 E|
|R.A.||05h 39m 6.0s (2000.0)|
|Dec.||+28° 00' 00" (2000.0)|
|Real Size||140 light yrs.|
|Distance||2600 light yrs.|
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)