Deep Sky Object in Summer
Around Sh2-112, Sh2-115 (Diffused Nebulae in Cygnus)
|Date & Time: ||Oct 12 2012, from 22:31 to 23:41 JST(+0900)
|Mosaic of 3 flames of 3 shots composed with 8 minutes exposed|
|Optical: ||TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
|with Astronomik CLS-CCD filter|
|Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
|Digital Camera: ||Canon EOS 550D (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.|
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
This image has captured a northern corner of Cygnus, there is the alpha Cygni, Deneb at just outside of left edge of the image.
Two round reddish nebulae are paralleling in north south direction in left hand side of the image, southern and northern nebulae are Sh2-112 and Sh2-115, respectively.
Both have sizes of 15 or 20 arc minutes, we can take their tiny figures easily by photographing the constellation of Cygnus with a wide photo lens.
Furthermore, you can recognize a smaller reddish nebula of Sh2-116 at 40 arc minutes northwest of Sh2-115.
Although the nebula has an ID of planetary nebula (PK 85+4.1), actually it's only region where hydrogen gas has gathered densely by chance.
|Sh2-112 / Diffused Nebula, type E|
|R.A.||20h 34m 03.0s (2000.0)|
|Dec.||+45° 38' 42" (2000.0)|
|Real Size||25 light yrs.|
|Distance||5700 light yrs.|
|Other IDs|| -||
|Sh2-115 / Diffused Nebula, type 2 E|
|R.A.||20h 34m 27.2s (2000.0)|
|Dec.||+46° 48' 30" (2000.0)|
|Real Size||110 light yrs.|
|Distance||7500 light yrs.|
|Other IDs||LBN 358|
And perhaps you can detect a stripe-shaped gaseous region in right hand side, this region corresponds to a northern end of IC1318 surrounding gamma Cygni, Sadr.
||Objects around Sh2-112, 115