NGC 6397 in Ara

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    12" ASA: LRGB 12" ASA: LRGB - 100% crop    
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© Velimir Popov & Emil Ivanov 2013
 

NGC 6397 (also catalogued Caldwell 86), is a globular cluster in the constellation Ara. Located at about 7,200 light-years from Earth, it is one of the two nearest globular clusters to Earth (the other one is Messier 4). Faintly visible to the unaided eye under a dark sky,this cluster contains about 400,000 stars. NGC 6397 is one of the our Milky Way's clusters that have undergone a core collapse. This means that the core has contracted to a very dense stellar agglomeration.

Object details

Right Ascension 17:40:42 (h:m:s)
Declination -53:40:27 (deg:m:s)
Size 32 (arcmin)
Distance 7.2 (kly.)

Image details

Annotation
Center of field RA 17:40:35 (h:m:s)
Center of field DE -53:38:09 (deg:m:s)
Size 57.1 x 42.9 (arcmin)
Pixel scale: 1.03 (arcsec/pixel)
Orientation: Up is 177 degrees E of N
Charts and image details obtained from Astrometry.net
Optic(s): ASA 12" f 3,6 Astrograph (ASA)
Mount: ASA DDM85
Camera: FLI MicroLine 8300 CCD camera
Filters: Luminance, Red, Green, Blue, Astrodon filters
Dates/Times: 11 and 12 May 2013
Location: Namibia-TIVOLI ASTROFARM, S 23° 27' 40,9" / E 18° 01' 02,2"
Exp. Details: R:5x1 min, G:5x1 min, B:5x1 min, Total Exposure Time - 15 min
More details: Dark and flat frames reduction
Processing: PixInsight / PS
 
Copyright: Velimir Popov and Emil Ivanov 2013. All Rights Reserved
 
e-mail: info@irida-observatory.org
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