Gamma Cassiopeiae

Also known as 27 Cassiopeiae, γ Cassiopeiae, y Cassiopeiae, Navi

star in the constellation Cassiopeia

Key facts

Constellation: Cassiopeia
Right ascension: 00 56 42.50108
Declination: +60 ° 43 ′ 00.2984 ″
Apparent magnitude v: 2.39 (varies by ± 0.01)
Evolutionary stage: main sequence
Spectral type: B0.5IVe
U b color index: −1.08
B v color index: −0.15
Variable type: γ Cas

via Wikipedia infobox

Wikidata facts

Distance from Earth: 0.19
Mass: 17
Image: Gamma Cassiopeiae and its associated nebulosity.jpg

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spectral class: B0ne
catalog code: TYC 4017-2319-1
stellar rotational velocity: 295
Commons category: Gamma Cassiopeiae
apparent magnitude: 2.064583
effective temperature: 27990
parallax: 5.94
radial velocity: 16.1
surface gravity: 2100
absolute magnitude: -3.98
right ascension component of proper motion: 25
declination component of proper motion: -3
right ascension: 14.17721289375
declination: 60.71674002472

Sources (3)

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Article

Gamma Cassiopeiae, Latinized from γ Cassiopeiae formally named Tiansi, is a multiple star system at the center of the distinctive "W" asterism in the northern circumpolar constellation of Cassiopeia. It was observed in 1866 by Angelo Secchi, the first star ever observed with emission lines. It is now considered a Be star.

Gamma Cassiopeiae is a variable star system. Based upon parallax measurements made by the Hipparcos satellite, it is located at a distance of roughly 550 light-years from Earth. Together with its common-proper-motion companion, HD 5408, the system could contain a total of eight stars. It is one of the highest multiplicity systems known.