Deep Sky Object in Summer
NGC6304 (Globular Cluster in Ophiuchus)

Date & Time: May 2 2014, from 24:22 to 24:35 JST(+0900)
Composed 4 shots with 4 minutes 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)

NGC6304 / Globular cluster, type VI
R.A.17h 14m 32.5s (2000.0)
Dec.-29°27' 44" (2000.0)
Apparent Size8.0'
Real Size45 light yrs.
Distance19,200 light yrs.
Around southern edge of the Ophiuchus, NGC6304 is a medium-sized globular cluster positioned at a border to Scorpius. The cluster has a visual brightness of 8th magnitude and an apparent diameter of about 8 arc minutes. You can find a major globular cluster of M62, positioned at a border between Scorpius and Ophiuchus, at about 3 degrees west of the cluster.



Copyright(c) 2014 by Naoyuki Kurita, All rights reserved.
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