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)|
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.
|NGC6638 / Globular Cluster|
|R.A.||18h 30m 56.2s (2000.0)|
|Dec.||-25°29' 47" (2000.0)|