M103 (Open cluster)

R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.

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From Cambridge , M103 is visible all night because it is circumpolar. It will be highest in the sky shortly before dawn, when it will be lost to twilight at around 04:21, 27° above your north-eastern horizon. At dusk, it will become visible at around 20:59 (EDT), 17° above your northern horizon.

Name M103
Object type Open cluster
Other names
M103[1]
NGC 581[3]
Cr 14[4]
Mel 8[5]
Position
Right ascension:01h33m [3]
Declination:+60°39' [3]
Constellation:Cassiopeia
Magnitude:7.40 (V) [5]
7.72 (B) [3]
Distance:2.2 kpc
7.2 klyr [2]
B-V Color (mag):0.32
Derived quantities
Absolute mag (V):-4.31

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