Iiro's DeepSky Sketches

Name: Messier 103	Other name: NGC 581
RA: 1h 33.4m	DEC: +60° 39'
Constellation: CAS
Type: Open cluster
Magnitude: 7.4
Size: 6.0'
Surface brightness: 11
Number of stars: 40
Brightest star: 10.6
Classification: III 2 p
Description: Cl,pL,B,R,Ri,*10..11
Notes: in Cas OB8,incl Struve 131 6-9m 14"
Observer: Iiro Sairanen
Location: Kuopiola, Ruokolahti, Finland
Date: 26/27.4.2003 0:56
Instrument: Newton 406/1830 mm
Magnification: 244x	Filter: -
Field: 13'	Seeing: 2
Background sky: 3	NE lim mag: 6.2
Visuality: I	Height: 33°
Weather: -5°
Description: Vähätähtinen joukko, jossa viitisen kirkkaampaa tähteä ja parisenkymmentä himmeämpää.
Updated: 27.4.2003 14:30
Name: Messier 103	Other name: NGC 581
RA: 1h 33.4m	DEC: +60° 39'
Constellation: CAS
Type: Open cluster
Magnitude: 7.4
Size: 6.0'
Surface brightness: 11
Number of stars: 40
Brightest star: 10.6
Classification: III 2 p
Description: Cl,pL,B,R,Ri,*10..11
Notes: in Cas OB8,incl Struve 131 6-9m 14"
Observer: Iiro Sairanen
Location: Lakasenpelto, Imatra, Finland
Date: 0/1.11.2002 0:00
Instrument: Newton 406/1830 mm
Magnification: 146x	Filter: -
Field: 21'	Seeing: 2
Background sky: 3	NE lim mag: 5.5
Visuality: I	Height: 88°
Weather: -6C
Description: A poor open cluster. 3* mags 7..8 and few dimmer *.
Updated: 7.7.2003 18:22