Iiro's DeepSky Sketches

Name: Messier 55	Other name: NGC 6809
RA: 19h 40m	DEC: -30° 58'
Constellation: SGR
Type: Globular cluster
Magnitude: 7
Size: 19.0'
Surface brightness: 13
Classification: XI
Description: pB,L,R,vRi,vgbM
Notes: * mags 15...
Observer: Iiro Sairanen
Location: Boca de Tauce (1980m), Tenerife, Spain
Date: 16/17.4.2004 4:45
Instrument: Newton 110/805 mm
Magnification: 47x	Filter: -
Field: 64'	Seeing: 3
Background sky: 2	NE lim mag: 6.9
Visuality: II	Height: 15°
Weather: +2°C, moist
Description: About 10' in size globular. Several stars were visible. Two brightenings on southside.
Updated: 15.5.2004 12:32