Deep Sky Object in Winter
Around Sh2-227 (Diffused Nebula in Auriga)
|Date & Time: ||Oct 12 2012, from 26:19 to 26:55 JST(+0900)
|5 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)|
Sh2-227 is a faint diffused nebula positioned in the Auriga's pentagon, 6 degrees southeast of Capella.
You can recognize that the nebula has uneven structures in almost round region with a diameter of a bit larger than 20 arc minutes.
You can see a small open cluster of NGC1857 in 0.5 degrees north of the nebula, about 40 member stars have been gathered in 5 arc minutes in diameter.
The cluster looks unexpectedly striking because of its high star density.
|Sh2-227 / Diffused Nebula, type 5 R|
|R.A.||05h 19m 51.0s (2000.0)|
|Dec.||+38° 55' 00" (2000.0)|
|Real Size||80 light yrs.|
|Distance||14,000 light yrs.|
|Other IDs|| LBN 781||
|NGC1857 / Open Cluster, type I 3 m|
|R.A.||05h 20m 06.0s (2000.0)|
|Dec.||+39° 20' 36" (2000.0)|
|# of Stars||40|