The fainter one is Regulus B, a cool orange dwarf star with a spectral classification of K2 V. The B star has a mass that is 80% of the suns, and its half as bright. By the time of the Persian Empire (550 BC330 BC), Aldebaran watched the Eastern sky and was the dominant star in the Taurus constellation, Regulus watched the North and was the dominant star in the Leo constellation, Antares watched the West and was the alpha star in Scorpio, and Fomalhaut watched the Southern sky and was the brightest star in Piscis Austrinus (sharing the same longitude with the star Sadalmelik which is the predominant star in Aquarius). The star is also one of the vertices of the Spring Triangle, a conspicuous asterism visible in the evening sky during the northern hemisphere spring. You might have heard of a star called Regulus D. This does not refer to the spectroscopic companion of Regulus A, but to a 12th-magnitude star that sits 212 arcseconds from Regulus. It is sometimes known by its traditional name, Subra. The central region of M95 has a ring-shaped starburst region around the core with a diameter spanning about 2,000 light years. He was the brother of Sirius Black, Harry's godfather, named for the brightest star in the sky. Its traditional name, Adhafera, comes from the Arabic al-afrah, which means the curl or the braid.. Pingback: Antares: the scorpions heart |, Pingback: Aldebaran: the Bulls Eye WE ARE STAR STUFF, Pingback: Spica: the Wheat Sheaf We Are Star Stuff. 5 star rating. If we go across the sea to Egypt, we can see a different take on the constellation Leo myth. The Washington Double Star Catalog", Bright Star Regulus near the Leo I Dwarf Galaxy, https://en.wikipedia.org/w/index.php?title=Regulus&oldid=1149452547, Articles containing Ancient Greek (to 1453)-language text, Short description is different from Wikidata, Articles with unsourced statements from September 2022, Articles with unsourced statements from August 2018, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 12 April 2023, at 10:00. In medieval astrology, Regulus was one of the 15 Behenian fixed stars, believed to hold special astrological power. [27] The next will occur on October 1, 2044, also by Venus. Some Peruvians also knew these stars as the Mountain Lion, whereas in China it was sometimes seen as a horse, and at other times as part of a dragon. Fixed star Regulus, Alpha Leonis, is a 1.4 magnitude blue-white star in Leo Constellation. The galaxy was discovered by Charles Messier in 1780. Retrieved from https://theplanets.org/stars/regulus-star/. Other stars that belong to this association are Alpha Pictoris in the constellation Pictor, Beta Canis Minoris in the constellation Canis Minor, and the stars in the open cluster IC 2391, also known as the Omicron Velorum Cluster, located in the constellation Vela. According to the first one, the constellation represents seven brothers and their sister who fled to the sky to escape a pursuer. Given the extremely distorted shape of the primary, the relative orbital motion may be notably altered with respect to the two-body purely Keplerian scenario because of non-negligible long-term orbital perturbations affecting, for example, its orbital period. Regulus can also sometimes be occulted by asteroids. The star can easily be seen without binoculars. Regulus B and Regulus C take about 600 years to complete an orbit around a common centre of mass. It was another of the constellations identified by Ptolemy, but records show that it was known to an earlier Greek astronomer named Eudoxus. Along with Regulus in Leo, Alpha Virginis is believed to be one of the bright stars that made it possible for Hipparchus (160 - 120 BC) to discover the precession of the equinoxes, after comparing his data to that of the Alexandrian Timochares, who had observed Spica and Regulus around 300 BC. Alpha Leonis is not really a single star, but a multiple star system. The Planets 2010 - 2023 | Privacy Policy & Affiliate Disclaimer, Copyright 2023 ThePlanets.org | Sitemap, Regulus Star Image https://mirkokosmos.tumblr.com/image/114076419912, Regulus size comp https://www.daviddarling.info/images/flattened_stars.jpg, Location Of Regulus image https://starwalk.space/gallery/images/the-moon-venus-regulus-jpg/1136639. Wigwam Resort Golf Course. Regulus appears singular, but is actually a quadruple star system composed of four stars that are organized into two pairs. It is located at 79 light-years from us. The easiest way to spot the constellation Leo in the sky is to look for the Sickle, shaped like a backwards question mark. The Egyptians considered Leo the House of the Sun, as when they first charted the stars, Leo was rising with the sun at the solstice, so Leo and Sirius were associated with the heat of summer. Beta Leonis is a relatively young star. Southwest Valley Chamber of Commerce . The stars name, Regulus, means little king or prince in Latin. The stars Greek name, Basiliscos, had the same meaning. Accessed on May 1, 2023. https://theplanets.org/stars/regulus-star/. The galaxy is classified as a double-barred spiral with a small inner bulge through the centre along with an outer bulge. Venus last occulted Regulus on July 7, 1959. Messier 105 is an elliptical galaxy in Leo. During the December 2026 occultation, Mars and Jupiter will be nearby. It is one of the lowest-mass stars ever discovered, as well as one of the faintest. The existence of a white dwarf companion would mean that the system is at least 1 billion years old, just to account for the formation of the white dwarf. The last occultation of Regulus by a planet was on July 7, 1959, by Venus. 2.08), Denebola (Beta Leo, mag. Larry Sessions has written many favorite posts in EarthSky's Tonight area. It is part of the Leo Triplet, along with M65 and NGC 3628. The two are separated by 0.35 astronomical units and complete an orbit around a common centre of mass every 40.11 days. It has an apparent magnitude of 12.6. [4] When the stars were aligned accordingly, favourable conditions followed, and when they were negatively aligned, disaster was predicted. A Type Ia supernova, SN 1998bu, was discovered in M96 in May 1998. A supernova was observed in M95 in March 2012. Differential bending of light was measured to be consistent with general relativity. Astronomers from Babylon knew the star as Sharru (the King) and in Persia, Regulus was one of the four Royal Stars, along with Aldebaran in Taurus, Antares in Scorpius and Fomalhaut in Piscis Austrinus. The Egyptians also recognized the Leo constellation and it's champion star, Regulus. Their name derives from Arabic bahman, "root," as each was considered a source of astrological power for one or more planets.Each is also connected with a gemstone and plant that would be used in rituals meant to draw the star's . I am the author of five books on mythology, including one on sun-goddesses. It is easy to observe in a small telescope under good conditions and appears as a bright double star with orange red and greenish yellow components. It crept higher in the sky with each passing day in March and April, as winter favorites like Orion descended westward. The stars traditional name, Alterf, comes from the Arabic a-arf, which means the view (of the lion).. They are the only navigational stars in Leo. Designated RegulusB and RegulusC, the pair has Henry Draper Catalogue number HD 87884. M95 belongs to the M96 Group of galaxies, which also includes M96 and M105, and also at least nine other galaxies. It was discovered by Pierre Mchain on March 20, 1781 and then included in Messiers catalogue a few days later. The discrepancy can be accounted for by a history of mass transfer onto a once-smaller Regulus A. The best time of the year to observe the stars and deep sky objects of Leo is during the month of April, when the constellation is high above the horizon in the evening. Both Eratosthenes and Hyginus wrote that the lion was placed among the constellations because it was the king of beasts. Located in the southern hemisphere, Centaurus is named for the half man half horse creatures of Greek mythology. (In Arabic, Qalb al-Asad, anglicized to Kabelaced.) Because of its proximity to Earth, the star is often mentioned in works of fiction. NGC 3607 is a spiral galaxy in Leo. I am the child of earth and starry heaven. Petelia Tablet, We are all in the gutter, but some of us are looking at the stars. Oscar Wilde. "Regulus Star Facts & Features About The Little King". Regulus is located about 79 light-years from Earth. Accessed 1 May, 2023. The other components of the Alpha Leonis system are still on the main sequence, but considerably fainter than Regulus A. Regulus was also known by the Arabic name Qalb al-Asad, the Greek name Kardia Leontos and Latin Cor Leonis, all meaning the heart of the Lion. In Europe, the star was known as Rex and Basiliscus. It has a visual magnitude of 3.856 and is approximately 5,000 light years distant. Regulus, Al Jabbah, and Algieba, together with the fainter stars Leo (Adhafera), Leo (Ras Elased Borealis), and Leo (Ras Elased Australis), constitute the sickle. It rose above the horizon as the sun set, stayed up all night long, and reached its highest point due south (as seen from the Northern Hemisphere) at local midnight. It has an apparent magnitude of 1.35 and is not actually a single star, but a multiple star system. The galaxy resembles a giant maelstrom of glowing gas, rippled with dark dust that swirls inwards towards the nucleus. However, although it looks like one star to the eye, its actually four stars. In the MUL.APIN, a catalogue of stars and constellations in Babylon, Regulus was listed as LUGAL. (Cepheid variables, named after Delta Cephei in Cepheus constellation, are very luminous stars that have a direct relationship between their luminosity and pulsation period, which makes these stars important standard candles for establishing distance scales.). The main components are designated as Alpha Leonis (Regulus) A, B, and C. Regulus A is a spectroscopic binary system consisting of a blue-white main sequence star and a dim companion that has not yet been seen directly. The galaxy can be found below the bright star Theta Leonis. Regulus, in a horoscope or predictive chart, signifies good fortune, pride, royalty, and success. It is 85 times more luminous than the Sun. (The Persians called it first Venant and then Miyan (the center). The rotation of Regulus speeds at 700,000 mph (1.1 million kph) at its equator. The star is visible at some point in the night year-round, with the exception of the month around August 22-24, when it is too close to the Sun. Regulus B is slightly hotter. Regulus is not a binary star for once, although there is a binary nearby, and possibly a white dwarf. The star is approximately 247 light years distant from Earth. [5] From this observation individuals began to denote them the royal stars. 163 Erigone, a large, dark asteroid from the asteroid belt, about 73 km in size, occulted Regulus on March 20, 2014. Regulus is 150 times brighter than the Sun, and its energy output is 350 times that of the latter. It can be located using the stars of the Big Dipper; Megrez and Phecda, the two inner stars of the Dippers bowl, point the way to the asterism. Both the constellation and its brightest star were well-known in most ancient cultures. The representation may be mythical (e.g. Its estimated age is less than 400 million years. Source. Regulus B is much dimmer, having only 0.50 solar luminosities, and an average temperature of around 4.885 Kelvin. Alpha Leonis is the closest bright star to the ecliptic. Overall rating. It is emitting polarized light because of this. There are two meteor showers associated with the constellation. Leo constellation map by IAU and Sky&Telescope magazine. [1] The Persians believed that the sky was divided into four districts with each district being guarded by one of the four Royal Stars. The two stars take approximately 40days to complete an orbit around their common centre of mass. Messier 65, Messier 66 and NGC 3628 form the famous Leo Triplet galaxy group. Leo 1 is a dwarf galaxy, and a member of our local group. It has an apparent magnitude of 13.54 and is only 7.78 light years distant. Icarus is a blue supergiant of the spectral type B, located approximately 14.4 billion light-years from Earth. In Indian astronomy, the stars name was Magh, the Mighty, after a Hindu lunar mansion that consisted of all the stars of the Sickle of Leo. Regulus' location is: One of the earliest references to Regulus was in ancient Persia, around 3000 B.C. Filter by rating. Regulus A is the dominant star, with a binary companion 177" distant that is thought to be physically related. Rho Leonis is another binary star in Leo. How are Hubble Space Telescope images made? It has an estimated age of at least a billion years. It is of about the same mass and size as the Milky Way. Something went wrong while submitting the form. It has a mass of 3.8 solar masses and is an extremely fast spinner, with a rotational velocity of 347 km/s. M96 is the brightest galaxy in the M96 Group. Around February 18, Regulus was opposite the sun. It would be another 40 years before anyone viewed it visually. It is a bluish star, and it can be seen all around the globe. 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. Denebola also exhibits a strong infrared excess, which suggests that it may have a circumstellar debris disk of dust in its orbit. Star Trek fans will recognize it as the location of the Battle of Wolf 359, in which the Borg, led by the assimilated Captain Picard, obliterate the Starfleet ships, leaving few survivors, among them Benjamin Sisko, the future captain of Deep Space Nine. The star is also known by its Latin name Cor Leonis and the Arabic Qalb al-Asad (Kalb al Asad, Kabeleced). The name of this star is a diminutive form of the Latin Rex. It is a main sequence star with the stellar classification A3 V. It has an apparent magnitude of 2.113 and is approximately 35.9 light years distant from Earth. The stars Altair and Achernar are also fast spinners with flattened, oblate shapes. So bright planets sometimes pass near Regulus. 4 stars. Regulus is the dot of the question mark. [32], For Earth observers, the heliacal rising (pre-sunrise appearance) of Regulus occurs late in the first week of September, or in the second week. The co-moving distance of 14.4 billion ly does not correspond to the lookback time because it takes into account the expansion of the universe in the time that it took for the stars light to reach us. The galaxy has an apparent magnitude of 12.8 and is approximately 331 million light years distant from Earth. Its brightness is 288 times that of the Sun. The Arabic name for the star is Qalb al-Asad, which means the heart of the lion.. Erigone extinguished the stars light for 14 seconds, but the occultation was not observed due to unfavourable weather conditions. 5 stars. Along with Sirius and Orion, Regulus would be one of the star systems from which man originates. If the star were spinning 10 percent faster, it would fly apart as its gravity would not be strong enough to hold it together. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, working inside a spacesuit, and participating in a simulated Mars mission. NY 10036. If it were rotating 16% faster, the centripetal force provided by the stars gravity would not be enough to hold the star together. The star has two known companions nearby,. It has the Bayer designation designated Leonis, which is Latinized to Alpha Leonis, and abbreviated Alpha Leo or Leo. 3.324), Adhafera (Zeta Leo, mag. And, every month, the moon passes near Regulus. The constellation Orion sits on the Celestial Equator, making it visible to people in both the northern and southern Hemispheres (via NASA's Chandra x-Ray Observatory).It is said to represent the figure of Orion, a famed hunter from Greek mythology.One of the earliest references to this constellation by the name Orion can be found in the ancient Greek epic poem "Iliad" by Homer (via Britannica). It is classified as a high proper motion star. Gliese 436 is another red dwarf located relatively close to the Sun. [3], By 700 BCE the Assyrians had essentially mapped the ecliptic cycle because of the four stars and were in result able to map the constellations, distinguishing them from the planets and the fixed stars.[4]. Archaeological evidence suggests that Mesopotamians had a constellation similar to Leo as early as 4000 BC. 5-star recommended Tempe escape room, perfect for a night out, family bonding, date night, celebrations like birthday. The Planets, https://theplanets.org/stars/regulus-star/. As a result, it has an oblate shape. Regulus was also one of the 15 Behenian fixed stars in medieval astrology, which were believed to have influence on one or more planets. They are dimmer main sequence stars with an apparent magnitude of 8.14 and 13.5. 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. Join our Space Forums to keep talking space on the latest missions, night sky and more! The name Regulus is from the diminutive form of the Latin rex, meaning little king. Amateur astronomers can view it, but this requires dark skies and a large telescope. In other words, Kepler's third law, which holds exactly only for two point-like masses, would no longer be valid for the Regulus system. The text dealt with astrology and the supposed effect of events in the sky on humanity. While it appears relatively dim to the unaided eye, the star is 5,600 times more luminous than the Sun and has an absolute magnitude of -5.60. The dwarfs are about 95 AUs apart, more than three times the average distance between Neptune and the sun.
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