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Aldebaran (Arabic: الدَّبَران, lit. 'The Follower') (Proto-Semitic *dVbr- “bee”) is a star located in the zodiac constellation of Taurus . It has the Bayer designation α Tauri , which is Latinized to Alpha Tauri and abbreviated Alpha Tau or α Tau.
The Winter Hexagon or Winter Circle/Oval is an asterism appearing to be in the form of a hexagon with vertices at Rigel, Aldebaran, Capella, Pollux, Procyon, and Sirius. It is mostly upon the Northern Hemisphere's celestial sphere.
Aldebaran: α Tau 65 K5 III Northern 15 0.96 (0.6–1.6var) Antares: α Sco ... Pollux: β Gem 34 K0 III Northern 18 1.16 Fomalhaut: α PsA 25 A3 V Southern 19
Aldebaran (α Tauri) 45.1 ± 0.1 [94] AD Fourteenth brightest star in the night sky. Arcturus (α Boötis) 25.4 ± 0.2 [95] AD This is the nearest red giant to the Earth, and the fourth brightest star in the night sky. Pollux (β Geminorum) 9.06 ± 0.03 [90] AD The nearest giant star to the Earth. Spica (α Virginis A) 7.47 ± 0.54 [96]
The triangle includes two first magnitude stars, while Sirius is even brighter. The other bright stars of the winter sky lie around the triangle: Orion including Rigel; Aldebaran in Taurus; Castor and Pollux in Gemini; and Capella in Auriga.
Pollux is the brightest star in the constellation of Gemini. It has the Bayer designation β Geminorum , which is Latinised to Beta Geminorum and abbreviated Beta Gem or β Gem . This is an orange-hued, evolved red giant located at a distance of 34 light-years , making it the closest red giant (and giant star ) to the Sun.
In 1993, radial velocity measurements of Aldebaran, Arcturus and Pollux showed that Arcturus exhibited a long-period radial velocity oscillation, which could be interpreted as a substellar companion. This substellar object would be nearly 12 times the mass of Jupiter and be located roughly at the same orbital distance from Arcturus as the Earth ...
Pollux: β Geminorum: Zeus' other twin son (Castor, α Gem, is the first twin) 244 N 28° 1.15 [8] [29] 22 : Avior: ε 1 Carinae: coined name 234 S 59° 2.4 [8] [30] 23 : Suhail: λ Velorum: shortened form of Al Suhail, one Arabic name for Canopus 223 S 43° 2.23 [8] [31] 24 : Miaplacidus: β Carinae: quiet or still waters 222