Basic object information
Object name: NGC 6539
Object type: Globular cluster
Magnitude: 8.9
Size: 7.9'
Object classification: X
Description: vS,F
Notes: In heavily obscured area

Catalog information
RA (J2000.0): 18h 04m 48.0s
Dec (J2000.0): -7 35' 00"
Constellation: Serpens

Observer: Iiro Sairanen
Obs. place: Ania, Pirkkala, Finland
Date/Time: 23/24.9.2009 22:00

Telescope: Newton 300/1500 mm

Magn: 214x
Field: 23'
Background sky: 3 (20.9)Visuality: IV

Filter: -
NE Lim.mag: 6.5
Seeing: 4
Height: 14

Weather: +7C

Little brighter core, somewhat granular with averted vision.