Deep Sky Object in Summer
IC4701 (Diffused Nebula in Sagittarius)
|Date & Time: ||Aug 10 2013, from 23:15 to 23:49 JST(+0900)
|Mosaic of 2 flames that are RGB-composed from 6min.×6shots each|
|Optical: ||(GB image) BORG 60ED+Reducer (f=297mm, F5.0) with Moon & Skyglow filter
|(R image) TAMRON SP 300mmF2.8 (Stop: F2.8) with Astronomik CLS-CCD & R64 filters|
|Auto-guided with TAKAHASHI EM-200 Equatorial
|Digital Camera: ||(GB image) Canon EOS 600D (Remodeled)
|(R image) Canon EOS 550D (Remodeled)|
|Location: ||Koumi town, Nagano pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
|CCD Sensitivity...ISO800(GB image), ISO1600(R image)|
In northern edge of the Sagittarius, you can find out a faint emission nebula of IC4701 at a degree southwest of the Omega Nebula (M17).
The nebula has a size of about 60×40 arc minutes but is extraordinary dimmed, not a observing object in scope-aided eyes.
The nebula is positioned just north of the Star Cloud in Sagittarius, you can appreciate uncountable fine stars distributed at this vicinity.
The distance to the nebula has been estimated about 12 thousand light years.
|IC4701 / Diffused Nebula, type 4 E|
|R.A.||18h 16m 15.0s (2000.0)|
|Dec.||-16° 33' 00" (2000.0)|
|Real Size||15 light yrs.|
|Distance||11700 light yrs.|
|Other IDs||Sh2-44, LBN56|