NGC 6539, globular cluster

Globular Star Cluster NGC 6539

NGC 6539 - a globular cluster

CCD image taken with an ST-6 CCD camera thru our 20-inch F/8.1 telescope. The field of view is about 5x7 arc minutes. Exposure = 10 minutes.

Description of NGC 6539 in
The Deep Sky Field Guide to Uranometria 2000:

Magnitude of the brightest stars = 15.9
Horizontal branch stars magnitude = 18.3
Concentration: 10 ( scale 1{dense} to 12{loose} )

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NGC 6539
Magnitude: 9.6
Constellation: Serpens
RA: 18h 04m 48.0s
Dec: -07° 35' 00" Epoch 2000
Size (mins): 6.9'
Classification: Globular Cluster

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George Normandin, KAS

October 30th, 2000