Deep Sky Object in Summer
M5 (Globular Cluster in Serpens)

Date & Time: May 20 2017, from 22:19 to 22:50 JST(+0900)
Composed 8shots with 3 minutes & 6shots with 1 minute exposed
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 6D (Remodeled)
Location: Furudono town, Fukushima pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Device Size...35×24mm, Sensitivity...ISO6400

M5 (NGC5904) / Globular Cluster, type V
R.A.15h 18m 36.0s (2000.0)
Dec.+02° 05' 00" (2000.0)
Apparent Size12.7'
Real Size130 light yrs.
Distance27,000 light yrs.
M5 (NGC5904) is a spectacular globular cluster in the constellation of Serpens Caput (head), with a size of about 13 arc minutes. There is a star "5 Serpentis" with magnitude of 5 just 30' SE of M5, the star is a good mark to search the cluster with telescopes. You can see the star at the lower left hand side in this photograph. The cluster has nearly similar size with M13 in Hercules; it's one of representative globular clusters in summer sky.
M5 is a globular cluster with the largest real size of 130 light years in Messier's catalogue. Distance is 27 thousand light years away.



Copyright(c) 2017 by Naoyuki Kurita, All rights reserved.
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