Brief Description   A supernova remnant lying around eastern wing of Cygnus, gaseous region is distributed like a gigantic ring-structure. The object is consists of east and west segments. And the eastern region has a clear filament structure, can be seen with binoculars.

Photography Condition
Date & Time... Apr 29 2017, from 26:13 to 27:22 JST(+0900)
   Composed 6shots with 6min. exposed, mosaic of 2 flames
Optical... TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
   with IDAS LPS-D1 Light-pollution suppression filter
   Auto-guided with TAKAHASHI JP Equatorial & SBIG STV star-tracker
Digital Camera... Canon EOS 6D (Remodeled)
   (ISO1600, recorded in 14bit CCD-RAW)
Location... Ooizumi, Hokuto city, Yamanashi pref.