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Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris (Latinized to Alpha Ursae Minoris) and is commonly called the North Star or Pole Star. With an apparent magnitude that fluctuates around 1.98, [3] it is the brightest star in the constellation and is readily visible to the naked eye at ...
While there was no naked-eye star close to the pole, the midpoint between Alpha and Beta Ursae Minoris was reasonably close to the pole, and it appears that the entire constellation of Ursa Minor, in antiquity known as Cynosura (Greek Κυνόσουρα "dog's tail"), [1] was used as indicating the northern direction for the purposes of ...
Epsilon Ursae Minoris has no traditional name. Zeta Ursae Minoris has no traditional name. Eta Ursae Minoris has no traditional name. Marking the Little Bear's tail, [15] Polaris, or Alpha Ursae Minoris, is the brightest star in the constellation, varying between apparent magnitudes 1.97 and 2.00 over a period of 3.97 days. [23]
Polaris (α UMi / α Ursae Minoris / Alpha Ursae Minoris, commonly North(ern) Star or Pole Star, or Dhruva Tara and sometimes Lodestar) is the brightest star in the constellation Ursa Minor. It is very close to the north celestial pole (42′ away as of 2006, making it the current northern pole star.
This is the list of notable stars in the constellation Ursa Minor, sorted by decreasing brightness. Name B F Var HD HIP RA Dec vis. mag. abs. mag. Dist. Sp. class Notes
Polaris (Alpha Ursae Minoris/North Star/Pole Star) 323–433: 3: F7Ib + F6 + F3V: The closest star to the celestial north pole and the closest Cepheid variable.
Dubhe (Alpha Ursae Majoris) 123 ± 2: 1: K0III + A5V +1.79: Iota Crucis: 125 ± 1: 1: K0 III: ... Beta Ursae Minoris (Kochab) 130.9 ± 0.6: 1: K4 III +2.08: Tau ...
The mean position of the North Star Polaris (Alpha Ursae Minoris) on the first of January was Right Ascension, 1 hour, 41 minutes, 59 seconds; North Polar distance, 1 degree, 1 minute, and 33.8 seconds. Astronomers of the early twentieth century determined that such a combination of astronomical events is unlikely to recur for many thousands of ...