Thuban (α Dra / α Draconis / Alpha Draconis) is a star (or star system) in the constellation of Draco.
Thuban is a white A0III giant having a luminosity about 260 times that of the sun. Spectral analysis indicates that Thuban has a companion star orbiting with a 51.4 day period. Burnham gives the separation between the stars as about 20 million miles.
Thuban
( Dra) A fourth-mag A0 star. It was the "Pole Star" at the time the Egyptians built the Pyramids.
Thulium ...
Thuban is the Arabic name for Dragon. To find Thuban sweep down the length of the Little Dipper and jump over to the end of the handle of the Big Dipper. Midway is found a much fainter star, which is Thuban.
Thuban = Alpha Draconis
Rastaban = Beta Draconis
Eltanin = Gamma Draconis
Altais (Nodus II) = Delta Draconis
Al Dhibain "Posterior" = Zeta Draconis
Al Dhibain "Prior" = Eta Draconis
Theta Dra = Theta Draconis
Edasich = Iota Draconis # ...
Thuban (in southern Draco) was the "pole star" around 3000 BC. The next naked-eye star that served as the Earth's pole star was Kochab in the bowl of the Little Dipper from about 1900 BC to 1100 BC.
see Thuban. [H76]
Drell-Yan Annihilation
annihilation of a quark and an antiquark, thereby producing a high energy or high momentum photon, W or Z boson. [D89] ...
The star Thuban (Draconis) was the northern pole star around 2700 BC, during the time of the ancient Egyptians. Due to the effects of precession, it will once again be the pole star around the year 21 000 AD.
the southern border streches along DECL=+50 degrees; to the east and the west it extends from RA=10h to RA=20h. It looks like Draco is encircling the Little Bear, Ursa Minor.
Long time ago, about 3500 years B.C., alpha Dra, also called Thuban ...
the vernal equinox was in the constellation Aries and the star Thuban (in Draco) was the closest bright star to the NCP.
[3445] alpha Draconis or Thuban ("the basilisk") is not a very conspicuous star in comparison. It is a binary star consisting of a white giant with an apparent magnitude of 3.
The "North Star" of the period was α-Draconis, also known as Thuban, though it was 2° away from true North at the time of Khufu.
The brightest star in the Draco is Thuban; it is located in the dragon's tail.
About 4000 years ago, the star Thuban was the North Star. Since then, precession of the Earth's axis has changed where the North Pole points, so the North Star is now Polaris. In another 10,000 years or so, the North Star will be Vega.
Alpha Draconis is called Thuban, from a highly corrupted form of the Arabic ra's al-tinnin, ‘the serpent's head'. Beta Draconis is called Rastaban, another corrupted form of the same Arabic name.
Named stars: Alpha Dra (Thuban), Gamma Dra (Eltanin), Delta Dra (Al Tais)
Info:
Equuleus (Little Horse) ...
We do know that about 5,000 years ago, around the time the Great Pyramid at Giza and Stonehenge were being constructed, the Earth's north pole pointed near the star Thuban, in Draco.
the North Star was a star called Thuban (also known as Alpha Draconis), and in about 13,000 years from now the precession of the rotation axis will mean that the bright star Vega will be the North Star.
5,000 years ago it pointed at the star Thuban in the constellation Draco. In 14,000 AD, the "pole" star will be Vega in Lyra. It requires 26,000 years for the north celestial pole to complete one precessional circle around the sky.
The shaft on the north side leads directly to the north celestial pole, which in Cheops' time corresponded to the star Thuban in the constellation Draco.
Figure 5. The direction that the Earth's pole points changes slowly so that in the far future it will be pointing to stars such as Alderamin, Vega, Thuban, and eventually again Polaris.
Thabit Upsilon Orionis
Theemin Upsilon-2 Eridani
Thuban Alpha Draconis
Tien Kuan Zeta Tauri
Toliman Alpha Centauri
Torcularis Septentrionalis Omicron Piscium
Tseen Kee Phi Velorum
Tureis Pi Puppis
Tyl Epsilon Draconis ...
It consists of four stars in a trapezoid, burning brightly just north of Hercules. From there, the tail slithers through the sky, ending between the Big and Little Dippers. The end of the constellation is held by Thuban, ...
The ancient Egyptians regarded as pole star the star Thuban or "Alpha Draconis," the brightest star (=alpha) in the constellation Draco, the serpent. For more information about the motion of the pole, see here and here.
Some 12,000 years from now"nearly halfway through one cycle of precession"Earth's axis will point toward a star called Vega, which will then be the "North Star." Five thousand years ago, the North Star was a star named Thuban in the constellation ...
Dra), Arrakis (Al Rakis, ν Dra), Altais (Aldib, Nodus II, δ Dra), Dziban (ψ1 Dra), Edasich (ι Dra), Eltanin (Etamin, γ Dra), Giansar (Gianfir, λ Dra), Grumium (ξ Dra), Kuma (ν2 Dra), Rastaban (β Dra), Thuban ...
The star lies in the southeastern part (15:24:55.8+58:57:57.8, ICRS 2000.0) of Constellation Draco (see chart and photo), the Dragon -- west of Theta Draconis, southeast of Thuban (Alpha Draconis), and south of the Big Dipper (or Plough).
Because of the Earth's precession, these stars are only the current pole stars. Several bright stars lie close to the North Celestial Pole during the 23,000 year precession cycle, including Vega (α Lyrae), Thuban (α Draconis), ...
In the case of the Egyptian pyramids, it has been shown they were aligned towards Thuban, a faint star in the constellation of Draco. The effect can be substanstial over relatively short lengths of time, historically speaking.
 See also: Sky, Constellation, Star, Draco, Earth
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