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)|
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.
|NGC6304 / Globular cluster, type VI|
|R.A.||17h 14m 32.5s (2000.0)|
|Dec.||-29°27' 44" (2000.0)|
|Real Size||45 light yrs.|
|Distance||19,200 light yrs.|