- Alpha Cephei
Starbox begin
name=Alpha Cephei Starbox observe
epoch=J2000
ra=21h 18m 34.8s
dec=+62° 35′ 08.0″
appmag_v=2.45
constell=Cepheus Starbox character
class=A7 IV
b-v=0.22
u-b=0.12
variable=Suspected Starbox astrometry
radial_v=-11.5
prop_mo_ra=149.91
prop_mo_dec=48.27
parallax=66.84
p_error=0.49
absmag_v=1.57 Starbox detail
mass=1.9
radius=2.5
luminosity=18 | temperature=7,600
metal=?
rotation=246 km/s.
age=? Starbox catalog
names=Alderamin, 5 Cephei, Gl 826, HR 8162, BD +61°2111, HD 203280, GCTP 5139.00, SAO 19302, FK5 803, HIP 105199.Alpha Cephei (α Cep / α Cephei) is a
star in theconstellation of Cepheus. It also has the traditional name Alderamin.Alderamin is an A-type star, evolving off of the
main sequence into a subgiant, likely on its way to becoming ared giant as its hydrogen supply runs low. Alderamin is noted for having an unusually fast rotation, though the effects of this rotation are not well understood.The name Alderamin is a contraction of the Arabic phrase الذراع اليمين "að-ðirā‘ al-yamīn" "the right arm," with the first definite article transliterated literally as "al", as is often the case with Arabic star names. It is known as 天鈎五 (the Fifth Star of the Celestial Hook) in Chinese.
This star is located near the precessional path traced across the celestial sphere by the Earth's north pole. That means that periodically this star comes within 3° of being a pole star, much as
Polaris is at present. This will next occur about the year 7500 A.D.ee also
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List of nearest bright stars
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