Deep Sky Object in Spring
M44 (The Praesepe in Cancer)
|Date & Time: ||Mar 14 2015, from 21:16 to 21:42 JST(+0900)
|Mosaic of 2 flames of composed 4shots with 3 minutes exposed|
|Optical: ||BORG 67FL with a conversion lens (f=255mm, F3.8)
|with IDAS LPS-P2-FF Light-pollution suppression filter|
|Auto-guided with TAKAHASHI JP Equatorial
|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)|
M44 (NGC2632) is a bright open cluster clearly visible to the naked eye on a dark enough sky.
The cluster is well-known as "The Praesepe", meaning of a crib, and also called "The Beehive Cluster" in English.
It's best appreciated with binoculars or small scope, its 1.5 degree size is equivalent to about three full-moons end-to-end,
and distance is estimated about 520 light years.
|M44 (NGC2632) / Open Cluster, type d, II 3 m|
|R.A.||08h 40m 6.0s (2000.0)|
|Dec.||+19° 59' 00" (2000.0)|
|Real Size||13 light yrs.|
|# of Stars||50|
|Distance||520 light yrs.|
This grouping is so large it was known in antiquity, when it was thought to be something non-stellar object like a nebula.
Japanese had regarded the cluster as a lump of souls in the ancient time, and the sight of it had terrified them.