Deep Sky Object in Summer
NGC6638 (Globular Cluster in Sagittarius)


Date & Time: Sep 20 2014, from 20:10 to 20:25 JST(+0900)
Composed 6 shots with 3 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)
Sensitivity...ISO3200




NGC6638 / Globular Cluster
R.A.18h 30m 56.2s (2000.0)
Dec.-25°29' 47" (2000.0)
Apparent Size7.3'
Real SizeN/A
Magnitude9.2
DistanceN/A
NGC6638 is a compact globular cluster positioned at 40 arc minutes east of lambda Sgr. The cluster has a size of a bit larger than 7 arc minutes and a brightness of 9th magnitude. Although the cluster is not a major object in this star field, the constellation of Sagittarius has includes the center of Galaxy, uncountable globular clusters have distributed in it.




NGC6553

NGC6642


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