Deep Sky Object in Summer
Sh2-54 (Diffused Nebula in Serpens)
|Date & Time: ||Aug 10 2013, from 21:46 to 22:30 JST(+0900)
|Mosaic of 2 flames that are RGB-composed from 6min.×4shots 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)|
A vast and dimmed reddish gaseous region of Sh2-54 is spread just north of M16, the nebula has an apparent span of about 2 degrees.
Although you can detect M16 with your own eyes as a white cloudy object, Sh2-54 is not a naked eye celestial object.
The nebula is one of lamps of gigantic hydrogen gas distributed along the galactic equator;
actually M16 and Sh2-54 form one-body gaseous matter.
You can detect only M16 with your eyes because it's fairly brighter than other surrounding nebulae.
|Sh2-54 / Diffused Nebula, type 1 E|
|R.A.||18h 18m (2000.0)|
|Dec.||-12° 14' (2000.0)|
|Apparent Size||about 120'|
|Real Size|| -|
|Other IDs||LBN71, LBN72|