Deep Sky Object in Winter
M78 & Barnard's Loop (Diffused Nebula in Orion)
|Date & Time: ||Dec 20 2014, from 24:11 to 24:47 JST(+0900)
|Composed 8 shots with 5 minutes exposed|
|Optical: ||BORG 60ED with a conversion lens (f=245mm, F4.1)
|with IDAS LPS-P2-FF Light-pollution suppression filter|
|Auto-guided with VIXEN ATLUX 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)|
M78 (NGC2068) is a faint reflection nebula about 2.5 degree NE of Altanik (zeta Ori) with a size of 8 arc minutes.
The nebula is fairly striking because vast dark nebula conceals stars around M78.
|M78 (NGC2068) / Reflection Nebula, type 1 R|
|R.A.||05h 46m 42.0s (2000.0)|
|Dec.||+00° 03' 00" (2000.0)|
|Real Size||3.7 light yrs.|
|Distance||1600 light yrs.|
The Barnard's loop is a faint and gigantic ring nebula with a diameter of over 18 degrees, which covers whole of eastern Orion.
Its shape can be detected only by photo films, it's considered that the Barnard's loop is a remnant of supernova exploded about one million years ago.
This picture shows you a north end of the loop; it's the deepest region in this inter-stellar gas.
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