Deep Sky Object in Winter
NGC1851 (Globular Cluster in Columba)
|Date & Time: ||Dec 5 2015, from 23:51 to 24:31 JST(+0900)
|Composed 6 shots with 8 minutes exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
|with BaaderPlanetarium Moon&Skyglow filter|
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Canon EOS D600 (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
It's M79 in a constellation of Lepus that represents the globular clusters in winter skies.
NGC1851 is another globular in winter south of M79, in a constellation of Columba.
Actually NGC1851 has brighter magnitude and larger diameter than those of M79.
But the globular has a height of meridian transit at most 15 degrees at around Tokyo, has much fewer chances to observe that than M79.
The cluster has a highly concentration class of II, and coming on top of the bad scintillation in lower skies,
it's fairly difficult to resolve the individual member stars around center of cluster.
|NGC1851 / Globular Cluster, type II|
|R.A.||05h 14m 6.0s (2000.0)|
|Dec.||-40° 03' 00" (2000.0)|
|Real Size||72 light yrs.|
|Distance||54 thousand light yrs.|