Basic object information
Name: M 103
Type of object: Open cluster
Magnitude: 7.4
Size: 6.0'
Number of stars: 40
Magnitude of brightest star: 10.6
Object classification: III 2 p
Description: Cl,pL,B,R,Ri,*10..11
Notes: in Cas OB8;incl Struve 131 6-9m 14''

Catalog position for epoch J2000.0
Right ascension: 01h 33m 24.0s
Declination: +60 39' 00"

Constellation: Cassiopeia


Observer: Iiro Sairanen
Obs. place: Lakasenpelto, Imatra, Finland
Date/Time: 31/1.11-12.2002 0.00

Telescope: 16" Dobson f 4.5

Magn: 146x

Filter:

Field: 21'

NE Lim.mag: 5,5

Background sky: 3

Seeing: 2

Height: 88
Visuality: I
Weather: -6C

A poor open cluster. 3* mags 7..8 and few dimmer.

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