Basic object information
Object name: NGC 6553
Object type: Globular cluster
Magnitude: 8.3
Size: 9.2'
Object classification: XI
Description: F,L,lE,vglbM,rr
Notes: H IV 12;* mags 20...

Catalog information
RA (J2000.0): 18h 09m 18.0s
Dec (J2000.0): -25 54' 00"

Constellation: Sagittarius

Observer: Iiro Sairanen
Obs. place: Pico de la Nieve (1540 m), La Palma, Spain
Date/Time: 3/4.4.2008 5:45

Telescope: Newton 110/805 mm

Magn: 161x

Filter:

Field: 25'

NE Lim.mag: 6.7

Background sky: 2

Seeing: 3

Height: 31
Visuality: I
Weather: +9C, strong wind

Granular, no clear core, curved brightening goes through.