Deep Sky Object in Summer
M62 (Globular Cluster in Ophiuchus)

Date & Time: May 20 2005, from 26:05 to 26:18 JST(+0900)
Composed 4 shots with 4 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D70 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 8bit TIFF(3008×2000)
CCD Sensitivity...ISO800

M62 (NGC6266) / Globular Cluster, type IV
R.A.17h 01m 11.9s (2000.0)
Dec.-30° 07' 00" (2000.0)
Apparent Size4.3'
Real Size46 light yrs.
Distance22,000 light yrs.
M62 is a tine globular cluster positioned almost on the boundary line between Scorpius and Ophiuchus. Another globular cluster of M19, lying about 4 degrees north of M62, has almost same declination with that of Antares, so you can find M62 by tracing from Antares via M19 easily. The globular cluster has a visual magnitude of 6.6 and a diameter of about 4.3 arc minutes, almost same as those of M19. But M19 has fairly smashed oval while this M62 has circular appearance. Furthermore by adding another bright globular of M4 lying just west of Antares, you will become aware of that globular clusters have unexpectedly variety of impressions.



Copyright(c) 2005 by Naoyuki Kurita, All rights reserved.
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