skyandtelescope.com • NOVEMBER 2019 63
pKING 13 There’s a grouping of stars
on the edge of a lopsided trapezoid
asterism. I see it as III1p.
Mv* = 12 | S = 5′ | No. = 30 | Tr = II2m |
Mag. = 272×
ttKING 14 Easy to fi nd about ¼° northwest of
Kappa (κ) Cassiopeiae, King 14 is an open grouping
that’s separate from the background.
Mv = 8.5 | S = 7′ | No. = 186 | Tr = III1p | Mag. = 73×tKING 16 This is a tight grouping that stands out
nicely around 8′ southeast of the eclipsing binary
V755 Cassiopeiae.
Mv = 10.3 | S = 5′ | No. = 71 | Tr = I2m | Mag. = 73× and 272×tKING 21 Look for an
arc of four stars: two
brighter ones similar
in magnitude and two
others that are dimmer.
Small compared to
other King clusters,
you’ll fi nd King 21
about 7′ above and
about halfway along
a line connecting 8th-
magnitude HD 223649
and 9th-magnitude
HD 223369.
Mv = 9.6 | S = 4′ |
No. = 20 | Tr = I2p |
Mag. = 282×pKING 15 Visually, King 15 looks like it could be the “Bull’s-eye Cluster” to me. It’s quite an unusual
open cluster in that there is a bright star in the center encircled by a half dozen other stars.
Mv* = 18 | S = 3′ | No. = 12 | Tr = IV2p | Mag. = 337×qKING 20 Easier to fi nd than
King 11 (which I had just observed
earlier that night), King 20 appears
quite open — look for it a little
less than ½° east-southeast of the
eclipsing binary AR Cas. It displays
a moderate range of magnitudes
and no concentration to the center.
Mv* = 13 | S = 5′ | No. = 20 | Tr = II2p |
Mag. = 337×
V755 CasHD 223649 HD 2233695 ′5 ′5 ′5 ′5 ′5 ′