Iiro's DeepSky Sketches

Name: Messier 39	Other name: NGC 7092
RA: 21h 32.2m	DEC: +48° 26'
Constellation: CYG
Type: Open cluster
Magnitude: 4.6
Size: 32'
Surface brightness: 11
Number of stars: 30
Brightest star: 6.8
Classification: III 2 p
Description: Cl,vL,P,vlC,*7...10
Notes: Large but loose cluster
Observer: Iiro Sairanen
Location: Kuopiola, Ruokolahti, Finland
Date: 26/27.4.2003 1:15
Instrument: Newton 406/1830 mm
Magnification: 46x	Filter: -
Field: 59'	Seeing: 2
Background sky: 3	NE lim mag: 6.2
Visuality: I	Height: 35°
Weather: -5°
Description: Laaja-alainen avonainen jossa kymmenkunta ~7mag tähteä ja monia himmeämpiä. Näkyy helposti etsimessä.
Updated: 27.4.2003 14:35