Deep Sky Object in Summer
Snake Nebula (Dark Nebula in Ophiuchus)
|Date & Time: ||Jul 26 2014, from 22:57 to 23:23 JST(+0900)
|Composed 6 shots with 5 minutes exposed|
|Optical: ||TAKAHASHI 16cm(6.3") epsilon with a conversion lens (f=742mm, F4.6)
|Auto-guided with TAKAHASHI EM-200 Equatorial & Meade Pictor 201XT
|Digital Camera: ||Canon EOS 600D (Remodeled)
|Location: ||Koumi town, Nagano pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
The Snake nebula is positioned at 1.5 degree north of sita Oph that marks the right leg of serpent holder.
This field is squeezed between Scorpius and Sagittarius. The dark nebula has a formal name of Barnard 72, but the nickname of "Snake Nebula" is much familiar.
|B72 / Dark Nebula, type 2 S|
|R.A.||17h 21m 00s (2000.0)|
|Dec.||-23° 36' 00" (2000.0)|
This nebula is one of most popular dark gaseous clouds distributed in the Milky Way in summer.
Its span is equivalent to about 20 arc minutes, S-shaped string-like black lane can be taken only with normal photo lenses around the west edge of the Milky Way.