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The stars Greek name, Basiliscos, had the same meaning. "Regulus Star Facts & Features About The Little King". Only Alpha Centauri in the constellation Centaurus and Barnards Star in Ophiuchus are closer. 2.08), Denebola (Beta Leo, mag. It was discovered by Pierre Mchain on March 20, 1781 and then included in Messiers catalogue a few days later. As for what causes the rapid rotation, astronomers at the time said it was a mystery. Regulus, or Alpha Leonis, is the brightest star in Leo onstellation (magnitude 1.40). This fast rotation causes Regulus A to bulge at its equator, so it appears oblate, or egg-shaped. And if you have a news tip, correction or comment, let us know at: community@space.com. History and Mythology. Regulus, Al Jabbah, and Algieba, together with the fainter stars Leo (Adhafera), Leo (Ras Elased Borealis), and Leo (Ras Elased Australis), constitute the sickle. [27] The next will occur on October 1, 2044, also by Venus. The cloud was discovered by radio astronomers in 1983. Regulus Stargate | Wiki | Starseeds Amino Leo constellation is home to the bright stars Regulus and Denebola, the nearby star Wolf 359, and to a number of famous deep sky objects, among them galaxies Messier 65, Messier 66, Messier 95, Messier 96, Messier 105, and NGC 3628. 5 star rating. Get breaking space news and the latest updates on rocket launches, skywatching events and more! Regulus is the brightest object in the constellation Leo and one of the brightest stars in the night sky. So Regulus is visible at some time of night throughout the year, except for about a month on either side of August 22. With five stars brighter than magnitude 3.0, it is easy to spot, even from areas with some light pollution. Regulus star is also known as Basiliskos, Cor Leonis (Lions Heart), Qalb al-Asad and Rex. The star is an exceptionally fast rotator, with a rotation period of only 15.9 hours. They have a combined apparent magnitude of 3.53. EarthSky | Aldebaran is Taurus the Bull's bloodshot eye The name Regulus is a diminutive form of "rex", which is Latin for "king". NGC 3628 is an unbarred spiral galaxy approximately 35 million light years distant from the solar system. The representation may be mythical (e.g. Regulus is easy to find and identify because it is part of a prominent asterism known as the Sickle of Leo. Along with Sirius and Orion, Regulus would be one of the star systems from which man originates. Regulus passes through SOHO's LASCO C3 every August. Messier 65, image: Adam Block/Mount Lemmon SkyCenter/University of Arizona (CC BY-SA 4.0). [31] The star can be viewed the whole night, crossing the sky, in late February. Exopaedia :: Regulus In the last 40 years of his life, he completed over 50 Messier Marathons and wrote 2 books on the subject. The two stars complete an orbit around their common centre of mass every 40 days or so. Her latest book, "Why Am I Taller? Christians in the Middle Ages sometimes referred to it as one of Daniels lions. Experience the game! While most of the bright stars of this constellation have been named in Arabic, the Latin name Regulusmeaning 'prince' or 'little king'turns out to be an exception. The Planets, https://theplanets.org/stars/regulus-star/.