Alpha Cassiopeiae

Also known as Schedar, α Cas, α Cassiopeiae, HIP 3179, HIC 3179, HR 168, HD 3712, 18 Cas

star in the constellation Cassiopeia

Key facts

Constellation: Cassiopeia
Right ascension: 00 40 30.4411
Declination: +56 ° 32 ′ 14.392 ″
Evolutionary stage: horizontal branch
Spectral type: K0-IIIa
Variable type: Suspected

via Wikipedia infobox

Wikidata facts

Distance from Earth: 70.9673
Radius: 37
Mass: 4.5
Image: Cassiopeia starfield.jpg

Show 17 more facts

spectral class: K0
catalog code: UBV M 7548
absolute magnitude: -1.99
stellar rotational velocity: 8.5
radial velocity: -4.204
apparent magnitude: 1.942524
effective temperature: 4510
metallicity: -0.4
surface gravity: 13.2
right ascension: 10.12683778292
declination: 56.53733115833
parallax: 14.091
luminosity: 676
color index: 1.13
declination component of proper motion: -31.595
age estimated by a dating method: 1054.5
right ascension component of proper motion: 49.126

Sources (6)

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Article

Alpha Cassiopeiae is a star in the northern constellation of Cassiopeia. It has the proper name Schedar, pronounced /ˈʃɛdɑːr/); Alpha Cassiopeiae is its Bayer designation, which is Latinized from α Cassiopeiae and abbreviated Alpha Cas or α Cas. Though listed as the "alpha star" by Johann Bayer, α Cas's visual brightness closely matches the 'beta' (β) star in the constellation (Beta Cassiopeiae) and it may appear marginally brighter or dimmer, depending on which passband is used. However, recent calculations from NASA's WISE telescope confirm that α Cas is the brightest in Cassiopeia, with an apparent magnitude of 2.240. Its absolute magnitude is 18 times greater than β Cas, and it is located over four times farther away from the Sun.

Nomenclature