Deep Sky Object in Summer
M10 (Globular Cluster in Ophiuchus)

Click on image to enlarge

Date & Time: May 3 2021, from 25:26 to 25:47 JST(+0900)
Composed 6 shots with 4 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 & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight


M10 (NGC6254) / Globular Cluster, type VII
R.A.16h 57m 6.0s (2000.0)
Dec.-04° 05' 59" (2000.0)
Apparent Size8.2'
Real Size85 light yrs.
Magnitude6.7
Distance16,000 light yrs.
M10 (NGC6254) is a small globular cluster found out at body of Ophiuchus. It looks like tiny explosions of star with dense core; large telescopes are needed to resolve the individual stars.
The cluster has real size of about 85 light years, and about 16 thousand light years away.



M9
M12

Copyright(c) 2021 by Naoyuki Kurita, All rights reserved.
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