(FrameSize=-' * -')

NGC663 = Cr20 = Mel.11 (Open Cluster) :the large cluster located to center,
NGC654 = Cr18 = Mel.9 (Open Cluster) :the small cluster located to upper right,
NGC659 = Cr19 = Mel.10 (Open Cluster) :the small cluster located to lower right.
[Cassiopeia]

Nov.14 1998, 21h52mJST (10min. Exposure)
Location: the Kasuo Pass, Awano town, Tochigi pref., Japan
Epsilon210c (21cm-reflector, f=628mm, F:3.0), Fuji-film SGA800

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Object Data

NGC663 = Cr20 = Mel.11
Type of object	Open Cluster	Type	e
Constellation	Cassiopeia
R.A.	01h 46.1m (2000.0)	Dec.	+61° 16' (2000.0)
Mag.(v)	7.1	Mag.(p)	-
Diameter	11'	Distance	2600 light-year
note	Containing about 80 stars
NGC654 = Cr18 = Mel.9
Type of object	Open Cluster	Type	d
Constellation	Cassiopeia
R.A.	01h 44.0m (2000.0)	Dec.	+61° 54' (2000.0)
Mag.(v)	9.1	Mag.(p)	-
Diameter	5'	Distance	3800 light-year
note	Containing about 50 stars
NGC659 = Cr19 = Mel.10
Type of object	Open Cluster	Type	d
Constellation	Cassiopeia
R.A.	01h 44.2m (2000.0)	Dec.	+60° 43' (2000.0)
Mag.(v)	9.8	Mag.(p)	-
Diameter	5'	Distance	6200 light-year
note	Containing about 30 stars

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