Open Clusters Cassiopeia s CEPHEUS CASSIOPEIA King 1 King 16 King 3 +60° g King 21 King 14 King 12 King 15 King 4 M103 b d King 13 a p2 King 19 M52 ` p1 King 2 o l King 20 +55° d _ PERSEUS 2h 30m 2h 00m 1h 30m 1h 00m 0h 30m 0h 00m Star magnitudes ¡ 2 3 4 5 6 7 23h 30m 5′ p KING 1 Moving into Cassiopeia, King 1 stands out from the field. The brighter stars in the cluster form a small asterism resembling a kite with a tail - can you see it? - with some haziness among the stars. Mv = 19.3 | S = 9′ | No. = 100 | Tr = II2r | Mag. = 337× u KING 2 Located some 26′ northeast of Eta (η) Cassiopeiae, King 2 is visibly smaller than King 1 and seems to stand out from the field. I noted only three brighter stars with a hazy glow around them. Mv = 19.8 | S = 4′ | No. = 40 | Tr = II2m | Mag. = 337× uu KING 12 I find that this cluster displays a fairly large range of brightnesses, and I would classify it as II3p. Mv = 9 | S = 3′ | No. = 15 | Tr = II1p | Mag. = 73× and 272× 5′ 5′ q KING 4 Look for this cluster 2′ to 3′ southwest of 9th-magnitude HD 15979. I caught a hint of it at 77×. With 337×, it was open and spread out, concentrated toward the center with a wide range of star brightnesses, and poor-to-medium in numbers, as per its Trumpler rating. Mv = 10.5 | S = 5′ | No. = 44 | Tr = III1p | Mag. = 77× and 337× HD 15979 5′ p KING 3 Also known as NGC 609, King 3 is quite faint, adjacent to and slightly northwest of a pair of 9th-magnitude field stars. I can only resolve a few stars. Mv = 11 | S = 3′ | No. = 77 | Tr = II3r | Mag. = 282× 62 N OV E M B E R 2 019 * SK Y & TELESCOPE 5′