Iiro's DeepSky Sketches

Name: Messier 12	Other name: NGC 6218
RA: 16h 47.2m	DEC: -1° 57'
Constellation: OPH
Type: Globular cluster
Magnitude: 6.6
Size: 14.5'
Surface brightness: 12
Classification: IX
Description: vB,vL,iR,gmbM
Notes: Somewhat loose structure
Observer: Iiro Sairanen
Location: Ahola, Joutseno, Finland
Date: 24/25.4.2003 2:02
Instrument: Newton 406/1830 mm
Magnification: 244x	Filter: -
Field: 13'	Seeing: 2
Background sky: 3	NE lim mag: 6.2
Visuality: I	Height: 23°
Weather: -5°, northern lights
Description: Ytimeen asti erottuva pallomainen, jossa tähdet ovat melko hajallaan. Kaksi uloketta länteen? (Ilmansuunnat unohtuivat).
Updated: 26.4.2003 17:08