Deep Sky Object in Spring
M3 (Globular Cluster in Canes Venatici)


Date & Time: Jan 23 2015, from 28:42 to 29:14 JST(+0900)
Composed 6shots with 4min. & 6shots with 30sec. exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Canon EOS 600D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO3200


M3 (NGC5272) / Globular Cluster, type VI
R.A.13h 42m 12.0s (2000.0)
Dec.+28° 23' 00" (2000.0)
Apparent Size19.0'
Real Size114 light yrs.
Magnitude6.4
Distance45,000 light yrs.
At about the zenith in spring night sky, we can see a wonderful globular cluster roughly halfway between Cor Caroli (alpha Canum Venaticorum) and Arcturus in Bootes. But you'll need a large scope to resolve its individual stars.
The cluster is about 45,000 light years away.



Mel.111
M53

Copyright(c) 2015 by Naoyuki Kurita, All rights reserved.
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