Deep Sky Object in Winter
M36, M37, M38 (Open Clusters in Auriga)
|Date & Time: ||M36: Dec 14 2014, 21:05 to 21:17 JST(+0900), 2min.×6shots|
|M37: Dec 14 2014, 21:24 to 21:35 JST(+0900), 2min.×6shots|
|M38: Dec 14 2014, 21:40 to 21:50 JST(+0900), 2min.×6shots|
|Optical: ||VIXEN 20cm(7.9") VISAC with a conversion lens (f=1278mm, F6.4)
|with BaaderPlanetarium Moon&Skyglow filter|
|Auto-guided with TAKAHASHI EM-200 Equatorial
|Digital Camera: ||Canon EOS 600D (Remodeled)
|Location: ||Hiraiso, Hitachi-naka city, Ibaraki pref.
|Camera Settings: ||Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
At about the zenith in winter sky, a trio of open clusters is bathed in the faint Milky Way of Auriga.
They are paralleled M37 (NGC2099), M36 (NGC1960), and M38 (NGC1912) from east to west. M38 has a bit sparser star-density than other two,
only M38 is classified in type f, M36 and M37 have a type of e.
Both appearances and real scales of all three are very alike. A telescope is preferred but you can at least locate these objects with binoculars.
It'll be very interesting to compare their distributions of stars and/or detailed structures with telescopes.
They have sizes of about 20 arc minutes and distances of 3500 to 4700 light years approximately.
Wide-field image around M36,M37,M38
|M36 (NGC1960) / Open Cluster, type f, I 3 r|
|R.A.||05h 36m 6.0s (2000.0)|
|Dec.||+34° 08' 00" (2000.0)|
|Real Size||13 light yrs.|
|# of Stars||60|
|Distance||3780 light yrs.||
|M37 (NGC2099) / Open Cluster, type f, I 2 r|
|R.A.||05h 52m 24.0s (2000.0)|
|Dec.||+32° 32' 59" (2000.0)|
|Real Size||27 light yrs.|
|# of Stars||150|
|Distance||4720 light yrs.||
|M38 (NGC1912) / Open Cluster, type e, type II 2 r|
|R.A.||05h 28m 42.0s (2000.0)|
|Dec.||+35° 50' 00" (2000.0)|
|Real Size||21 light yrs.|
|# of Stars||100|
|Distance||3580 light yrs.|