Caph (Beta Cassiopeiae)
Caph (Beta Cassiopeiae) is a giant or subgiant F star that is the second
brightest star in the constellation Cassiopeia.
Its name comes from an Arabic phrase meaning "the stained hand" –
the W-shape of this constellation being interpreted in Arab lore as the
splayed fingers of a stretched hand that has been colored by henna.
In terms of its evolution, Caph is currently in the Hertzsprung
Gap, a relatively short-lived stage (lasting a few tens of millions
of years), in which its core will shrink while its outer layers expand to
become a red giant. It is also unusual
in being a Delta Scuti star –
in fact, the brightest of this type – varying in brightness by about
6% over a 2.5-hour period. It has a small companion, about which little
is known, in a 27-day orbit.
||47 ± 4 light-years (14 ± 1 pc)
||R.A. 00h 09m 10.7s,
Dec. +59° 08' 59"
||Kaff, Al Sanam al Nakah, Gl 8,
HR 21, BD+58°3, HD 432,
LHS 1027, GCTP 16.00, SAO 21133,
FK5 2, HIP 746, GC 147, ADS 107,