Asterisms – Kemble 2, Mini-Cassiopeia, Alessi J18350+7223

Original article appears in GuideStar May, 2021.

By: Steve Goldberg

Asterism: a grouping of stars that form a recognizable pattern.
Constellation: Draco
Right Ascension: R.A.: 18h 35m 00.0s
Declination: + 72° 23' 00"
Magnitude:  7 to 9
Size: 20’
Found in the constellation Draco is an asterism of stars in the shape of a “W”. It is officially called “Kemble 2”, but is sometimes referenced as a “Mini-Cassiopeia”.
It is located near the star Chi Draco, in the “bend” of Draco the dragon.

This was first named by Father Lucian Kemble in August, 1994 in a note to astronomer Arlid Moland. It was Moland who gave it the “Mini Cassiopeia” name.  Independently of Kemble and Moland, Brazilian amateur Bruno Alessi cataloged this object as Alessi J18350+7223”.

(This history taken from the book “Star Clusters” by Brent Archinal and Steven Hynes)


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