It is now so entered in the IAU Catalog of Star Names. [33], Regulus A is a binary star consisting of a blue-white subgiant star of spectral type B8, which is orbited by a star of at least 0.3 solar masses, which is probably a white dwarf. What are synonyms for Regulus? For other uses, see, Notable stars and star systems coplanar with the ecliptic (and sun and approximately its planets, but specifically earth), "Validation of the new Hipparcos reduction", "MSC – a catalogue of physical multiple stars", "Spectroscopic Detection of the Pre-White Dwarf Companion of Regulus", "Bulletin of the IAU Working Group on Star Names, No. Another mystery is the source of its extremely rapid spin and strange motion. Regulus is a main sequence star like the Sun that generates light by converting hydrogen into helium at its core. 2, p. 212) described Regulus as " a multiple star, the brightest of which is a blue-white main sequence star, located some 79 light years from Earth. The two stars take approximately 40 days to complete an orbit around their common centre of mass. 3.486), Subra (Omicron Leo, mag. It was released in western countries as a SwitchStrike Starter Pack for CAD$17.99 in Canada, USD$12.99 in the United States, and AUD$24.99 in Australia. The description is based on the... Regulus C is not part of the constellation outline but is within the borders of the constellation. For example, in 1959, Regulus was occulted by Venus. New York, 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. 3.52), and Rho Leonis (mag. Regulus is a multiple star system consisting of at least four stars. 3.324), Adhafera (Zeta Leo, mag. Regulus is a multiple star system consisting of at least four stars. [26] The next will occur on October 1, 2044, also by Venus. It may convey royal properties, noble mind, frankness, courage. The planets that are housing life are actually closer to the constellation’s star labeled K2-3. Regulus first received its name from the 16th-century astronomer Nicolaus Copernicus, the encyclopedia added, "marking the fact that it had been regarded as one of the leading stars in the sky for some 2,000 years.". Photo taken Oct. 1, 2013. source of its extremely rapid spin and strange motion, Encyclopedia of Astronomy and Astrophysics, would only need to rotate about 10 percent faster to tear itself to pieces, Space Force has Biden's 'full support,' White House says, 'Babylon 5' gets remastered and is now available to rent or buy online, Intriguing dark streaks on Mars may be caused by landslides after all, Get 3 issues of your favorite space & science magazines for $3, Right ascension: 10 hours 8 minutes 22.3 seconds, Declination: +11 degrees 58 minutes 2 seconds. It is 77 light-years from Earth. Sirius A, like six of the brightest. Examples of how to use “regulus” in a sentence from the Cambridge Dictionary Labs Regulus A is the dominant star, with a binary companion 177" distant that is thought to be physically related. It's the brightest star in the constellation and among the brightest in Earth's night sky. [27] Regulus was occulted by the asteroid 163 Erigone in the early morning of March 20, 2014. Regulus, also called Alpha Leonis, brightest star in the zodiacal constellation Leo and one of the brightest in the entire sky, having an apparent visual magnitude of about 1.35. They added, however, that they couldn't see anything in the system that would cause it to move faster. Other planets will not occult Regulus over the next few millennia because of their node positions. It makes the wearer temperate, gives favor and appeases wrath. Other ancient cultures also saw it as a herald of kingly power. Despite being 80 light-years from Earth, and not even in the hundred closest star systems, it is the 21st brightest object in the night sky. 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. The name Regulus, derived from a Latin word for king, reflects an ancient belief in the astrological importance of the star. There is probably another companion as well, according to one research team that did measurements of the spin of Regulus. The constellation Leo was mentioned in the Tetrabiblos, an ancient Roman text by Ptolemy (c. A.D. 100 – 170). 2.08), Denebola (Beta Leo, mag. And if you have a news tip, correction or comment, let us know at: community@space.com. Every 8 years, Venus near-occults the star system around that time, as on 5 September 2014. 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, but is believed to be a white dwarf. Regulus is the common name for Alpha Leonis, often shortened to Alpha Leo, a blue-white star that is approximately four times wider than the Sun, and about 140 times as bright! The binary pair (two dwarfs, orange and red) are about 4,200 Earth-sun distances (astronomical units, or AU) away from Regulus and take about 130,000 years to complete one orbit, Darling said. Rēgulus is Latin for 'prince' or 'little king';[35] its Greek equivalent (Latinised) is Basiliscus. The discrepancy can be accounted for by a history of mass transfer onto a once-smaller Regulus A. 3.33), Eta Leonis (mag. While Regulus, like the sun, fuses hydrogen to helium in its center, it is more massive than the sun and therefore hotter and brighter. Regulus appears singular, but is actually a quadruple star system composed of four stars that are organized into two pairs. However, life isn’t necessarily found there. Main article: Energy Layer - Shelter Regulus Takara Tomy's Shelter Regulus is a Balance Type Energy Layer that features two lion heads and two lion claws on each side meant to represent this Layer’s namesake, the brightest star in the Leo Constellation, Regulus. α Leonis (Latinized to Alpha Leonis) is the star system's Bayer designation. The star is below the Moon as they climb into view by midnight tonight.The name “Regulus” means “the little king.” Yet it’s not so much a monarch as a ruling quartet. Regulus is the fixed royal star of the king in 6° sidereal Leo and in 1° tropical Virgo. 1", "Occultations of bright stars by planets between 0 and 4000", "The 2001 US Naval Observatory Double Star CD-ROM. It creates an intensely powerful personality shaped by the nature of the star. 1.40), Algieba (Gamma Leo, mag. © Object Type Open Cluster . Energy Layer - Shelter Regulus. Future US, Inc. 11 West 42nd Street, 15th Floor, The name Regulus is of the Star that astronomers deemed the heart of the lion. See more. Alpha Leo may dominate this star system, but it is not alone. The traditional name Rēgulus is Latin for 'prince' or 'little king'. "There's nothing that we know of that can speed this star up," said Georgia State University astronomer Hal McAlister, who led the study of the star at the university's Center for High Angular Resolution (CHARA), in an interview at the time. Regulus UK: /ˈrɛɡˌjulʊs/ US: /ˈrɛɡˌjʊlʊsˌ/,[20] designated α Leonis (Latinized to Alpha Leonis, abbreviated Alpha Leo, α Leo), is the brightest object in the constellation Leo and one of the brightest stars in the night sky, lying approximately 79 light years from the Sun. The last occultation of Regulus by a planet was on July 7, 1959, by Venus. 2.113), Zosma (Delta Leo, mag. Regulus definition, a first magnitude star in the constellation Leo. [17], The primary of Regulus A has about 3.8 times the Sun's mass. Regal Regulus at 29º Leo has the honor of being the closest star to the ecliptic and therefore closest to the red carpet path of the glorious Sun. [23], The Regulus system as a whole is the twenty-first brightest star in the night sky with an apparent magnitude of +1.35. The importance of … Largerlabelled image of the Pleiades, or a color photo of Regulus Aby. 2.56), Epsilon Leonis (mag. [15] The companion pair has an orbital period of about 600 years[4] with a separation of 2.5" in 1942.[15]. Indeed, the lowest mass white dwarfs are usually found in binary systems where they lost a significant fraction of their mass.". With a spectral type of B7 and a distance of 77 light-years, it's the closest B-type main-sequence star to the Sun. That’s because Regulus appears to consist of not one star, but four.Only one of them is bright enough to see 1 synonym for Regulus: genus Regulus. Regulus D is a 12th magnitude companion at 212", but is an unrelated background object. The 10 brightest stars in Leo are Regulus (Alpha Leo, mag. Total solar eclipse 2017 at Orin Junction, Wyoming - 04.jpg 1,292 × 1,048; 150 KB The Star Trek Encyclopedia (4th ed., vol. In Arabia, Regulus was referred to as Malikiyy, "the kingly one", according to stellar nomenclature expert Richard Hinckley Allen. Seven other stars which have a Bayer designation are less than 0.9° from the ecliptic (perfected, mean plane of earth's orbit and mean apparent path of the sun) the next brightest of which is δ (Delta) Geminorum, of magnitude +3.53. Regulus was one of the fifteen Behenian Fixed Stars, associated with granite, mugwort, celandine, mastic and the kabbalistic symbol . Regulus lies 79 light-years away and is estimated to be about 250 million years old. When Aldebaran was the star of the spring equinox, Regulus would have been the summer solstice star. The brighter pair, designated Regulus A, is a spectroscopic binary system consisting of a bright blue star and a companion that has not been directly observed, but is likely a white main sequence star with an unusually low mass of only 0.3 solar. Regulus is a bright star seen in the constellation Leo. The name of this star is a diminutive form of the Latin Rex. Because Regulus can stray within the ecliptic, or the path upon which the sun and planets travel, it is very occasionally eclipsed by one of the planets or an asteroid. [4] Designated Regulus B and Regulus C, the pair has Henry Draper Catalogue number HD 87884. Regulus A is itself a spectroscopic binary; the secondary star has not yet been directly observed as it is much fainter than the primary. Regulus A is the dominant star, with a binary companion 177" distant that is thought to be physically related. Regulus A is a blue-white star that. Its surface temperature averages about 12,460 Kelvin (roughly 21,970 degrees F … Regulus is 0.465 degrees from the ecliptic,[25] the closest of the bright stars, and is regularly occulted by the Moon. [39] It was one of the fifteen Behenian stars known to medieval astrologers, associated with granite, mugwort, and the kabbalistic symbol . Regulus, along with 5 slightly dimmer stars Zeta Leonis, Mu Leonis, Gamma Leonis, Epsilon Leonis and Eta Leonis have collectively been called 'the Sickle', which is an asterism that marks the head of Leo. John Chumack. Regulus, along with the 5 dimmer stars Zeta Leonis, Mu Leonis, Gamma Leonis, Epsilon Leonis, and Eta Leonis are collectively called the Sickle. Antonyms for Regulus. In Indian astronomy, Regulus corresponds to the Nakshatra Magha ("the bountiful"). The star was listed as one of four "royal stars," first under the name Venant and then Miyan ("the center", according to the Encyclopedia of Astronomy and Astrophysics.). Synonyms for reguluses in Free Thesaurus. Among the odd effects on the star: Regulus is much hotter at its poles (27,212 F, or 15,100 C) than its equator (18,032 F or 10,000 C). The first is a K2V star, while the second is about M4V. [31] For most Earth observers, the heliacal rising (pre-sunrise appearance) of Regulus occurs in the first week of September. Please refresh the page and try again. The 2005 study examined the effects of the rotation for the first time using the CHARA telescope array on top of Mount Wilson in California. The light output is dominated by Regulus A. Regulus B, if seen in isolation, would be a binocular object of magnitude +8.1, and its companion, Regulus C, the faintest of the three stars that has been directly observed, would require a substantial telescope to be seen, at magnitude +13.5. Thank you for signing up to Space. "A companion ... may be a low mass white dwarf or main sequence star," a preprint version of the research paper read. Babylonians called it Sharru ("the King"), and it marked the 15th ecliptic constellation. The Regulus star system consist of four components, or two pairs of stars. Regulus is a triple 1.3 magnitude star that flashes white and ultramarine. 2.98), Chertan (Theta Leo, mag. Under modern classifications, Regulus is considered a blue-white "B" star that lies on the main sequence of stellar evolution. The rotation of Regulus speeds at 700,000 mph (1.1 million kph) at its equator. 1 Regulus 2 Studies 2.1 2073 Investigation 2.2 2121 Investigation Regulus is a mostly inconspicuous star. Regulus passes through SOHO's LASCO C3 when the sun overlaps. NY 10036. [28] The center of the shadow path passed through New York and eastern Ontario, but no one is known to have seen it, due to cloud cover. Regulus is the 21st brightest star in the night sky and is the brightest star in Leo based on the Hipparcos 2007 apparent magnitude. Copernicus called it the Little King, after the Greek Basiliokos.It was the most important of the Four Royal Stars of the Persians, which marked the seasons.. All times shown in Redmond local time. Regulus is one of the four Royal Stars of Persia. Differential bending of light was measured to be consistent with general relativity. As Regulus closely aligns to the mean orbits of most significant objects of the solar system and is of many times greater magnitude than its comparators, the system has advanced telescopic use (to study and identify objects which may be its orbit) such as when it is occulted by a known asteroid and in observing the shadowing formed by any intermediate solar system matter, including asteroids. They share a common proper motion and are thought to orbit each other. [16], Regulus BC is 5,000 AU[34] from Regulus A. field images of Regulusfrom. The WGSN's first bulletin of July 2016[22] included a table of the first two batches of names approved by the WGSN; which included Regulus for this star. It will be lost to dawn twilight around 06:43, 16° … [30] Thus the star can be viewed the whole night, crossing the sky, in late February. stars of the Pleiades Clusterat left. From Redmond , Regulus is visible in the morning sky, becoming accessible around 19:46, when it reaches an altitude of 12° above your eastern horizon.It will then reach its highest point in the sky at 01:26, 54° above your southern horizon. Alternative Title: Alpha Leonis. Regulus (Alpha Leonis) The Lion's brightest star is the 21st brightest in the heavens, and is rated by astronomers as type B7V; type "B" stars are very hot, and Regulus shows this with a distinctly blue-white color (red stars are cooler, yellow medium). The primary component has more recently been given the stellar classification B8 IVn, indicating a subgiant star, one almost out of its supply of hydrogen. "The picture makes me wonder what it would be like to be in a solar system with this type of star.". The main star, called Regulus A, is large and blue, with a spectral type of B8 IVn. The International Occultation Timing Association recorded no observations at all.[29]. Synonyms for Regulus in Free Thesaurus. Join our Space Forums to keep talking space on the latest missions, night sky and more! Regulus definition is - a first-magnitude star in the constellation Leo. Also, Regulus Black is the name of a character in the "Harry Potter" series by J.K. Rowling. The dwarfs are about 95 AUs apart, more than three times the average distance between Neptune and the sun. Unseen by the naked eye are two very faint companions to the much larger bright star. There was a problem. The text dealt with astrology and the supposed effect of events in the sky on humanity. Media in category "Regulus (star)" The following 22 files are in this category, out of 22 total. Its image is a lion, cat, or an honorable person seated in a chair. HD 87884 is separated from Regulus by 176″ and is itself a close pair. It has one main asteroid belt between Theora and Yorrona. Follow @intheskyorg Redmond. Regulus is about 70 light-years away from Earth, making it the closest star of this type to our planet, according to astronomer David Darling. It is emitting polarized light because of this. This sky map shows the location of brilliant planet Venus and the bright star Regulus in the pre-dawn sky on Oct. 3, 2012, as viewed from mid-northern latitudes. It was like the King planet was placing a “crown” (like a circular diadem) over the King star (the Star of the Messiah). Under modern classifications, Regulus is considered a blue-white "B" star that lies on the main sequence of stellar evolution. The Arabic phrase is sometimes approximated as Kabelaced. Variations in the spin of the star mean there is probably a white dwarf, or dead star, lurking in the vicinity of Regulus, the astronomers argued in 2008. You will receive a verification email shortly. An occultation of Regulus by the asteroid 166 Rhodope was observed by 12 researchers from Portugal, Spain, Italy, and Greece on October 19, 2005. One of the brightest stars in the Inner Sphere, the Regulus star system consists of a B-type subgiant star with a white dwarf in a relatively close orbit, and an orange dwarf and red dwarf orbiting each other at thousands of AU from the first pair. 3.9). Regulus is magnitude 1.3, making it the faintest of 1st-magnitude stars and the 21st-brightest star overall. Get breaking space news and the latest updates on rocket launches, skywatching events and more! Latitude: Longitude: Timezone: 47.67°N 122.12°W PST. Regulus' location is: One of the earliest references to Regulus was in ancient Persia, around 3000 B.C. Position. 1 synonym for Regulus: genus Regulus. [15] This results in so-called gravity darkening: the photosphere at Regulus' poles is considerably hotter, and five times brighter per unit surface area, than its equatorial region. It has an apparent magnitude of 1.35, making it the 21st brightest star in the night sky. He was the brother of Sirius Black, Harry's godfather, named for the brightest star in the sky. Constellation: Centaurus: Magnitude: 10.20 : Right ascension: 13 h 34 m: Declination:-60°12' Source [1] The Collinder Catalog of Open Star Clusters: Visibility from Redmond. In the Babylonian MUL.APIN, Regulus is listed as Lugal, meaning king, with co-descriptor, "star of the Lion's breast". This is because the star is so distorted that it lessens gravity's strength, which then turns down the temperature at the equator, the researchers said. Although best seen in the evening in the northern hemisphere's late winter and spring, Regulus appears at some time of night throughout the year except for about a month (depending on ability to compensate for the sun's glare, ideally done so in twilight) on either side of August 22–24, when the Sun overlaps. It is found, naturally, in the brave heart of the constellation Leo the Lion. Regulus R3 5Star Tower is a Balance Type Beyblade released by Hasbro as part of the Burst System as well as the SwitchStrike System. Share. The two stars complete an orbit around a common centre of mass every 40.11 days. In science fiction, Regulus has been used for television series such as "Star Trek" and "Babylon 5." In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[21] to catalog and standardize proper names for stars. Space is part of Future US Inc, an international media group and leading digital publisher. What are synonyms for reguluses? (See Sloan Digital Sky Survey. [17] The star's surface at the equator rotates at about 320 kilometres per second (199 miles per second), or 96.5% of its critical angular velocity for break-up. This blue-white star has a companion, though the pair is technically k… The individual’s personality is larger than life, commanding, independent, outspoken, or arrogant. In Latin, the name "Regulus" means "little king." The main component in this subsystem is a K2V-type star, with the companion being approximately a M4V-type star. The spectroscopic binary Regulus A consists of a blue-white main-sequence star and its companion, which has not yet been directly observed, but is probably a white dwarf. Regulus D is a 12th magnitude companion at 212",[32] but is an unrelated background object. Visit our corporate site. It has five planets and 312 total moons. However, Regulus is more massive, so it shines brighter, hotter, and bluer. [36][37] It is also known as Qalb al-Asad, from the Arabic قلب الأسد, meaning 'the heart of the lion', a name already attested in the Greek Kardia Leontos[36][38] whose Latin equivalent is Cor Leōnis. Follow. The second pair of stars in the system, designated Regulus CD (HD 87884) in the Henry Draper Catalogue, is about 5,000 AU distant from the principal pair. 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. Occultations by Mercury and Venus are possible but rare, as are occultations by asteroids. Astronomers had a detailed look at Regulus' motion in a study published in 2005, showing that the star would only need to rotate about 10 percent faster to tear itself to pieces. In Persian it was Miyan, the Centre and Venant, one of the four royal stars of the Persian monarchy, where in 3,000 BC, as the Watcher of the North, it marked the summer solstice. In India it was known as Maghā ("the Mighty"), in Sogdiana Magh ("the Great"), in Persia Miyan ("the Centre") and also as Venant, one of the four 'royal stars' of the Persian monarchy. Regulus C Facts Regulus C is a m4v main sequence star that can be located in the constellation of Leo. It is spinning extremely rapidly, with a rotation period of only 15.9 hours, which causes it to have a highly oblate shape. Antonyms for reguluses. [citation needed] In Chinese it is known as 轩辕十四, the Fourteenth Star of Xuanyuan, the Yellow Emperor. The star has two known companions nearby, a set of binary stars, but observations in the past few years suggest there may be a white dwarf lurking close to Regulus as well. While this is one home in which I’m covering here… there are actually two more planets within the vacinity. They are separated by only 0.35 astronomical units. As for what causes the rapid rotation, astronomers at the time said it was a mystery. Regulus A was long thought to be fairly young, only 50 – 100 million years old, calculated by comparing its temperature, luminosity, and mass. (The sun's rotation is about 4,500 mph or 7,242 kph.) ". "We don't have any idea why it's really doing that," McAlister said. is larger, brighter, and hotter than. The BC pair lies at an angular distance of 177 arc-seconds from Regulus A, making them visible in amateur telescopes.[24]. They can be honor oriented… I. These three conjunctions of Jupiter with Regulus would have shown Jupiter making a type of “crowning effect” over the star Regulus. [40], Coordinates: 10h 08m 22.3s, +11° 58′ 02″, This article is about the star. Astrophotographer John Chumack sent in a photo of Mars (red), Regulus (blue star) and the waning crescent moon in a triangle over his backyard observatory in Dayton, OH. Regulus, the bright heart of Leo, the lion, shines close to the gibbous Moon the next couple of nights. Please deactivate your ad blocker in order to see our subscription offer. It is referred to as a ‘kingmaker,’ and bestows a majestic temperament upon its natives. The Washington Double Star Catalog", Bright Star Regulus near the Leo I Dwarf Galaxy, https://en.wikipedia.org/w/index.php?title=Regulus&oldid=1001641876, Articles containing Ancient Greek (to 1453)-language text, Articles with unsourced statements from August 2018, Creative Commons Attribution-ShareAlike License, This page was last edited on 20 January 2021, at 16:39.