Deep Sky Object in Summer
Around NGC6723 (Globular Cluster in Sagittarius)
|Date & Time: ||Jun 29 2012, from 25:52 to 26:20 JST(+0900)
|Composed 4 shots with 8 minutes exposed|
|Optical: ||TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
|with IDAS LPS-P1 Light-pollution suppression filter|
|Auto-guided with TAKAHASHI EM-200 Equatorial
|Digital Camera: ||Nikon D50 (Remodeled)
|Location: ||Furudono town, Fukushima pref.
|Camera Settings: ||Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)|
NGC6723 is a medium sized globular cluster positioned in northern region of Corona Austrina.
But this cluster is belonging to the constellation of Sagittarius. The globular has an apparent diameter of about 6 arc minutes;
you will be able to detect it as a nebula-like image by using of binoculars.
|NGC6723 / Globular Cluster|
|R.A.||18h 59m 36.0s (2000.0)|
|Dec.||-36° 38' 00" (2000.0)|
|Real Size||49 light yrs.|
|Distance||33 thousand light yrs.|
You can enjoy the flow of dark nebulae around the cluster because NGC6723 is lying near the Milky Way in summer.
This image shows you that a black patch region has been spread out in south east of the cluster,
this is a lump of dark gaseous matter obstructing the background fine stars.
And a small-sized and whitish reflection nebulae are positioned at 30 arc minutes ESE of the cluster,
which has numbers of NGC6726, 6727 and 6729. The nebulae are glittering by reflecting light of star in front of dark nebula.