Deep Sky Object in Summer
Cocoon Nebula (IC5146 in Cygnus)


Click on image to enlarge

Date & Time: Nov 5 2016, from 21:16 to 21:58 JST(+0900)
Composed 8shots with 6minutes exposed
Optical: VIXEN 20cm(7.9") VISAC with a conversion lens (f=1278mm, F6.4)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
Digital Camera: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Sensitivity...ISO3200



IC5146 / Diffused Nebula, type 1 E
R.A.21h 53m 24.0s (2000.0)
Dec.+47°16' 00" (2000.0)
Apparent Size12'
Real Size19 light yrs.
Magnitude -
Distance5500 light yrs.
Other IDsSh2-125, LBN424
IC5146 is a small round reflection nebula near a border to Cepheus, with a size of 12 arc minutes. A nickname of "The Cocoon Nebula" has came from its round shape and dimmed impression. A dark filament of B168 is stretched westward from the cocoon nebula itself, and it seemingly looks like that the nebula is drifting in the Milky Way, very humorous view. The nebula includes fairly complicated dark lanes in round emitting region, and is estimated about 5500 light years away.




IC4812 & surrounding molecular cloud

Diffused Nebulae in Cygnus


Copyright(c) 2008 by Naoyuki Kurita, All rights reserved.
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