Thuban (/ ˈθjuːbæn /), [6] with Bayer designation Alpha Draconis or α Draconis, is a binary star system in the northern constellation of Draco. A relatively inconspicuous star in the night sky of the Northern Hemisphere, it is historically significant as having been the north pole star from the 4th to 2nd millennium BC.

2020年6月12日 · Thuban, also designated as Alpha Draconis, is a double star system located in the constellation of Draco. Thuban is historically significant since it was the north pole star from the 4 th to 2 nd millennium BCE.

2023年8月9日 · Thuban isn’t a particularly bright star, but it holds a special place in the hearts of stargazers. That’s because Thuban – a relatively inconspicuous star in the constellation Draco the Dragon...

2015年11月8日 · Fixed star Thuban, Alpha Draconis, is a binary star system in the tail of the Dragon, Draco Constellation. Magnitude 3.67, spectral type A0IV + A1V. Despite being the Alpha star, Thuban is much fainter than Etamin, the brightest star in the constellation. Thuban.

2020年4月6日 · Thuban, Alpha Draconis (α Dra), is a spectroscopic binary star system located in the constellation Draco. Even though it has the designation Alpha, it is only the eighth brightest star in Draco. It has an apparent magnitude of 3.6452 and lies at an approximate distance of 303 light years from Earth.

Thuban or Alpha Draconis is a binary star system in the Draco constellation. Specifically, it is a spectroscopic binary which means only the spectrum of the primary star is detected. The primary star in the Thuban star system is a white giant that is 2.8 times as massive as the Sun.

The meaning of THUBAN is a white giant star of the fourth magnitude that is visible in the constellation Draco —called also Alpha Draconis. How to use Thuban in a sentence.

Alpha (α) Draco, Thuban, is a pale yellow star in the Dragon. Thuban and Al Tinnin are from the Arabic title for the whole of Draco , and Azhdeha from the Persian ( Azhdeha is Persian for dragon or serpent).

2021年5月25日 · Thuban or Alpha Draconis is a star located 270 light-years from Earth in the constellation of Draco, the dragon. It is bright enough to be seen by the naked eye. Around 2600 B.C., when the ancient Egyptians were building the …

2024年6月26日 · It was once an ordinary star in the northern sky, called Phoenice. And a star in Draco, called Thuban, was the pole star when the Egyptians built the pyramids some 5,000 years ago. The...