Deep Sky Object in Summer
NGC6366 (Globular Cluster in Ophiuchus)

Date & Time: Apr 17 2004, from 26:08 to 26:15 JST(+0900)
Composed 2 shots with 5 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: Fujifilm FinePix S2 Pro
Location: Ooizumi vil., Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto

NGC6366 / Globular Cluster, type XI
R.A.17h 27m 42.0s (2000.0)
Dec.-05° 05' 00" (2000.0)
Apparent Size8.3'
Real SizeN/A
There are three striking globular clusters of M10, M12 and M14 in the pentagon of Ophiuchus. And actually the NGC6366 is another one lying in the vast pentagon in summer skies. The globular is positioned about 3 degrees southwest from M14, and has an apparent size of about 8 arc minutes, very sparse stellar density with 10th magnitude in brightness. You can see the globular cluster as a dimmed nebula through telescopes, difficult to resolve individual stars.



Copyright(c) 2004 by Naoyuki Kurita, All rights reserved.
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