Deep Sky Object in Winter
Around Barnard's 7 (Dark Nebula around Taurus & Auriga)
|Date & Time: ||Dec 17 2011, from 22:33 to 23:01 JST(+0900)
|Composed 8 shots with 4 minutes exposed|
|Optical: ||AF zoom-Nikko 24-85mm (f=50mm, Aperture: F4.0)
|Auto-guided with EYEBELL CD-1 portable Equatorial
|Digital Camera: ||Nikon D700
|Location: ||Hitachi-oota city, Ibaraki pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4256×2832)|
|Device Size...FX format (36×24mm)|
We can detect the various shaped flows of dark nebulae in the winter's Milky Way by taking photographs.
The dark nebula is mainly consists of the cold hydrogen gas and/or the dust floating in the inner-galaxy space.
A noticeable vast dark nebula spreading around the constellation of Taurus and Auriga is named Barnard's 7.|
We can hardly recognize the existence of dark nebula until that conceals the background stars like a silhouette.
The Milky Way in winter is much fainter than that in summer, so the dark nebulae in winter sky are fairy indistinct.
Most of them are photographed, we can appreciate clearly in films.
|B7 / Dark Nebula|
|R.A.||04h 10m (2000.0)|
|Apparent Size||about 600'|