National Geographic Society-Palomar Observatory Sky Survey. Designated RegulusB and RegulusC, the pair has Henry Draper Catalogue number HD 87884. NGC 3596 is an intermediate spiral galaxy with a visual magnitude of 12.0. He was the brother of Sirius Black, Harry's godfather, named for the brightest star in the sky. In Greek mythology, Leo is associated with the tale of the Nemean Lion from the myth of Heracles and his twelve labours. However, Regulus C would require a larger telescope to be seen isolated from the system. It will do so again on October 1, 2044. Regulus A is a spectroscopic binary star (blue-white main-sequence star) and its companion star is believed to be a white dwarf. Messier 65, image: Adam Block/Mount Lemmon SkyCenter/University of Arizona (CC BY-SA 4.0). [26] Occultations by Mercury and Venus are possible but rare, as are occultations by asteroids. Regulus A has a right ascension of 10h 08m 22.311s and a declination of +11 58 01.95. The star is approximately 247 light years distant from Earth. They regarded Regulus as - the star that stands at the Lion's breast - or sometimes The King Star. The only time of year when the star cant be seen is for a month on either side of August 22, when it lies too close to the Sun. Regulus was also one of the 15 Behenian fixed stars in medieval astrology, which were believed to have influence on one or more planets. Bottom line: Regulus, the brightest star in the constellation Leo the Lion, is associated with the arrival of spring, and is prominent in May skies. Like Regulus and Denebola, Zosma has an equatorial bulge and an oblate shape. The flares from the star emit strong bursts of gamma rays and X-ray radiation. Before it became a white dwarf, the companion is believed to have transferred a lot of its mass onto the other star through gravitational interaction, speeding up the primary components rotation rate to what it is now. The stars traditional name, Alterf, comes from the Arabic a-arf, which means the view (of the lion).. Stretching across 947 square degrees of the sky, it is the third largest zodiac constellation (after Virgo and Aquarius) and the 12th largest of all constellations. [citation needed], The idea there existed four royal stars of Persia was analysed in a 1945 article in Popular Astronomy, where the idea was criticized as largely a relatively modern invention, and/or a misunderstanding of the original source texts.[1]. It looks like a single point of light, but is really four stars. With five stars brighter than magnitude 3.0, it is easy to spot, even from areas with some light pollution. The companion is believed to be a white dwarf. Epsilon Leonis is a bright giant of the spectral type G1 II. Regulus Starseeds. Regulus ranks 21st in the list of brightest stars in our sky. NY 10036. 27. The name Regulus is a diminutive form of rex, which is Latin for king. Later, as the stars of Aries took the spring equinox position, Aldebaran moved to the cross-quarter day of May 1, and Regulus took over August 1. It would be another 40 years before anyone viewed it visually. [37][38] It is also known as Qalb al-Asad, from the Arabic , meaning 'the heart of the lion', a name already attested in the Greek Kardia Leontos[37][39] whose Latin equivalent is Cor Lenis. Great. Its brightness is 288 times that of the Sun. The two stars complete an orbit around their common centre of mass every 40 days or so. Another mystery is the source of its extremely rapid spin and strange motion. The 2018 Gaia data release 2 revealed it to be a background object, not physically related to the Regulus system. Space is part of Future US Inc, an international media group and leading digital publisher. It has an apparent magnitude of 4.32. The galaxy Messier 95 stands boldly face-on, offering an ideal view of its spiral structure. It was discovered by Pierre Mchain on March 20, 1781 and then included in Messiers catalogue a few days later. Regulus is not a binary star for once, although there is a binary nearby, and possibly a white dwarf. Regulus star is also known as Basiliskos, Cor Leonis (Lion's Heart), Qalb al-Asad and Rex. The discrepancy can be accounted for by a history of mass transfer onto a once-smaller Regulus A. 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", "Gaia Early Data Release 3: Summary of the contents and survey properties", "Bulletin of the IAU Working Group on Star Names, No. [30], 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 2224, when the Sun is too close. 4 stars. In Greek mythology, The Greeks associated Constellation Leo with the Nemean Lion. 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). In 1978, Don was one of the independent inventors of the Messier Marathon, an attempt to find and view all 110 galaxies, clusters, and nebulae in one night. And now, in May, this blue-white star is brilliant in the eastern evening sky as soon as the sun goes down. This is not only the best golf resort in the area, but actually one the best in the country. Your submission has been received! Cor Caroli is another name for Regulus. Wolf 359 is one of the nearest stars to the Sun. As a result of Regulus fast rotation, the stars shape has been distorted into a highly oblate spheroid. 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. Some observers consider Denebola instead of the brighter Regulus to mark one of the vertices and form a more equilateral triangle. The companion is believed to be a white dwarf. Can you believe it? It has an apparent magnitude of 4.044 and is approximately 210 light years distant. This group, named the M96 Group, also includes the bright galaxies Messier 105 and Messier 95, as well as a number of smaller and fainter galaxies. . In contrast, our sun spins on its axis about once every 27 days. The Diamond of Virgo. There is probably another companion as well, according to one research team that did measurements of the spin of Regulus. Photo: ESO. Regulus has a mass 3.8 times that of the Sun and a radius 4.35 times solar. Zosma is a white main sequence star of the spectral type A4 V, approximately 58.4 light years from Earth. The main component in the Regulus A system is orbited by a companion with at least 0.3 solar masses. The fourth star in the system has never been directly resolved via imaging, but its presence is revealed by spectroscopic analysis of Regulus A. Astronomers think it may be a closely orbiting white dwarf star. A constellation is a pattern of stars in a recognisable shape that is supposed to resemble an object, animal or person. This name was used by the Greeks, Romans and Arabs. Its arms are also asymmetrical, thought to have been influenced by the gravitational pull of other galaxies within the same group as Messier 96. (The Persians called it first Venant and then Miyan (the center). Regulus is the only 1st magnitude star to sit almost squarely on the ecliptic, which marks the path of the sun, moon and planets across our sky. NGC 3593, image: NASA/ESA The Hubble Legacy Archive (HLA): Space Telescope Science Institute (STScI), the Space Telescope European Coordinating Facility (ST-ECF), and the Canadian Astronomy Data Centre (CADC) zoranknez (Aladin software). So bright planets sometimes pass near Regulus. He's a former planetarium director in Little Rock, Fort Worth and Denver and an adjunct faculty member at Metropolitan State University of Denver. It is the object within the Regulus system that can be seen with the naked eye. Regulus is the faintest of the 22 first-magnitude stars. It's whopping 75 times larger than the Sun, and incredible 150 times brighter! 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). The two stars have an orbital period of 500 years. The galaxy resembles a giant maelstrom of glowing gas, rippled with dark dust that swirls inwards towards the nucleus. The galaxy has an apparent magnitude of 12.8 and is approximately 331 million light years distant from Earth. Southwest Valley Chamber of Commerce . R Leonis is approximately 370 light years distant from the solar system. It is spinning extremely rapidly, with a rotation period of only 15.9 hours, which causes it to have a highly oblate shape. Language links are at the top of the page across from the title. It has a visual magnitude of 11.4 and is approximately 38 million light years distant. Fixed star Regulus, Alpha Leonis, is a 1.4 magnitude blue-white star in Leo Constellation. It is now so entered in the IAU Catalog of Star Names. 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. The spiral arms form an almost perfect circle around the galactic centre before they spread out, creating a mane-like effect of which any lion would be proud. By early April, Regulus was well up in the southeast an hour after sunset. As a result, the star is emitting polarized light. NGC 3626 is a medium-tightness spiral galaxy in Leo. The proper names of stars that have been officially approved by the International Astronomical Union (IAU) are Adhafera, Algieba, Alterf, Chertan, Denebola, Dingolay, Formosa, Moriah, Rasalas, Regulus, Sagarmatha, Subra, and Zosma. It is classified as a Delta Scuti variable, which means that its brightness varies slightly over a period of a few hours. Visit our corporate site (opens in new tab). Except that he did throw his lot in with Voldemort, which doesn't strike us as particularly clever. The name of this star is a diminutive form of the Latin Rex. In Latin, the name "Regulus" means "little king." [27] The next will occur on October 1, 2044, also by Venus. . The International Occultation Timing Association recorded no observations at all. Polish astronomer and mathematician Nicolaus Copernicus gave the star its name, which was equivalent to Basiliskos (little king), used by the Greek astronomer Ptolemy. Babylonians called it Sharru ("the King"), and it marked the 15th ecliptic constellation. As an 8th magnitude star, Regulus B can be seen with binoculars. It is of about the same mass and size as the Milky Way. CW Leonis is at a late stage of its evolution, blowing off its outer layer to eventually become a white dwarf. Theta Leonis is another white main sequence star. 1. The three-letter abbreviation, adopted by the International Astronomical Union (IAU) in 1922, is Leo. Pingback: Antares: the scorpions heart |, Pingback: Aldebaran: the Bulls Eye WE ARE STAR STUFF, Pingback: Spica: the Wheat Sheaf We Are Star Stuff. Regulus, designated Alpha Leonis, is a blue-white main-sequence star of magnitude 1.34, 77.5 light-years from Earth. Native Americans have two general Ursa Major myths. It has a visual magnitude of 10.2 and is approximately 32 million light years distant. [citation needed] In Chinese it is known as , the Fourteenth Star of Xuanyuan, the Yellow Emperor. Larry Sessions has written many favorite posts in EarthSky's Tonight area. Regulus B has the stellar classification K2 V, indicating an orange main sequence star, while Regulus C appears red and has been given the spectral class M4 V. The stars are much less massive than the primary, with masses of 0.8 and 0.3 solar masses respectively. Around February 18, Regulus was opposite the sun. . Mastodon: https://qoto.org/@howellspace, SpaceX Dragon debris lights up sky in bright fireball over western US during reentry (video), SpaceX Falcon Heavy rocket aborts triple satellite launch at last minute. Leo is also home to the red dwarf Wolf 359, one of the nearest stars to the Sun at a distance of 7.86 light years, the bright variable red giant star R Leonis, Icarus (MACS J1149 LS1), one of the most distant stars discovered to date, and the carbon star CW Leonis, the brightest star in the infrared N-band (10 m). Another, perhaps even more striking, feature of Messier 95 is its blazing golden core. Reblogged this on Die Goldene Landschaft. Leo is one of the largest northern constellations. Regulus is 150 times brighter than the Sun, and its energy output is 350 times that of the latter. The star has an optical companion, 35 Leonis, which has an apparent magnitude of 5.90. (Regulus axis is tilted 86 degrees.). The stars share a common proper motion with Regulus A and are believed to have an orbital period of several million years with the primary. 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. The star is sometimes known by its traditional names Chort (from the Arabic al-khart or al-khurt, which means small rib), Coxa (Latin for hip) and Chertan (from the Arabic al-khartn, meaning two small ribs). The Arabic name for the star is Qalb al-Asad, which means the heart of the lion.. The stars traditional name, Zosma, comes from ancient Greek and means the girdle. Zosma is located on the lions hip. In the northern hemisphere, Regulus is best seen in the evening in the late winter and spring. Image created using the Aladin Sky Atlas software from the Strasbourg Astronomical Data Center and DSS (Digitized Sky Survey) data. 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 is the bright star that makes the point of the question mark. 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. The poles are said to be gravity brightened, while the equator is gravity darkened. The poles of Regulus are five times brighter than the equator. [4] The sun was then surrounded by four bright stars at the beginning of every season. Leo is the 12th largest constellation in size, occupying an area of 947 square degrees. Mass transfer from the white dwarf progenitor onto Regulus accounts for any discrepancies between the stars age and its mass, temperature, and luminosity. R Leonis is a red giant star of the spectral type M8IIIe. Marissa B. Goodyear, AZ. . They eventually expel their outer envelopes to form planetary nebulae and become white dwarfs within a few million years. The galaxy has a visual magnitude of 8.9 and is about 36 million light years distant. Regulus is part of the Sickle of Leo, a sickle-shaped asterism that represents the head of the celestial Lion. Regulus B is much dimmer, having only 0.50 solar luminosities, and an average temperature of around 4.885 Kelvin. Regulus, also known as Alpha Leonis, is the brightest star in the constellation Leo and the 21st brightest star in the night sky. It is approximately 135 light years distant. It has an apparent magnitude of 10.1 and is about 31 million light years distant. [16] 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. The planet Venus passes the star around this time every eight years. It is emitting polarized light because of this. 3.486), Subra (Omicron Leo, mag. M96 is the brightest galaxy in the M96 Group. Regulus A is a spectroscopic binary star composed of a blue-white main sequence star belonging to the spectral class B7 V, and a companion star which cannot be resolved, but is believed to be a white dwarf. He began his 1st comet hunting program in 1975 and found his 1st comet in 1978, after 1700 hours of searching. [34], RegulusA is a binary star consisting of a blue-white subgiant star of spectral type B8, which is orbited by a star of at least 0.3solar masses, which is probably a white dwarf. Regulus was one of the four Royal Stars of Persia, along with Fomalhaut, Antares, and Aldebaran, the brightest stars in the constellations Piscis Austrinus (the Southern Fish), Scorpius (the Scorpion), and Taurus (the Bull). [23], The Regulus system as a whole is the twenty-first brightest star in the night sky with an apparent magnitude of +1.35. Regulus, in a horoscope or predictive chart, signifies good fortune, pride, royalty, and success. Denebola is the second brightest star in Leo and the 61st brightest star in the sky. This system is known as an active galactic nucleus. It was discovered by the German astronomer Albert Marth on April 5, 1864. [31] The star can be viewed the whole night, crossing the sky, in late February. Both the constellation and its brightest star were well-known in most ancient cultures. It is part of the Leo Triplet, along with M65 and NGC 3628. Regulus is not a binary star for once, although there is a binary nearby, and possibly a white dwarf. It's the brightest star in the constellation and among the brightest in Earth's night sky. It has a visual magnitude of 10.67 and is 33.1 light years distant. The star was also famously mentioned in an episode of The Outer Limits. Despite its proximity to the Sun, Wolf 359 can only be seen through a large telescope. Its symbol is . 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. Beta Leonis, called Denebola, is at the opposite end of the constellation to Regulus. [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]. In ancient Greece, the star was known as Basiliskos (little king), while in Rome it was known as Basilica Stella. Messier 96 is a very asymmetric galaxy; its dust and gas is unevenly spread throughout its weak spiral arms, and its core is not exactly at the galactic centre. It is a bluish star, and it can be seen all around the globe. Accessed on May 1, 2023. https://theplanets.org/stars/regulus-star/. The star is also known by its Latin name Cor Leonis and the Arabic Qalb al-Asad (Kalb al Asad, Kabeleced). The genitive form of Leo, used in star names, is Leonis (pronunciation: /lions/). The four stars with their modern names, and their ancient Persian names (in brackets) were: The four dominant stars have an apparent magnitude1.5 or brighter. Fittingly, King Richard I of England was also famously known as the Lionheart, or more commonly Couer de Lion in French. 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. With a visual magnitude of 1.35, Regulus A is responsible for the star systems brightness and bluish colour. Source. Regulus is located 83 light years away from Earth. The Greeks associated Leo with the Nemean lion, the beast defeated by Heracles during the first of his twelve labours. The stars traditional names, Rasalas (or Ras Elad Borealis) and Alshemali are abbreviated from the Arabic phrase ras al-asad a-aml, which means the northern (star) of the lions head.. The traditional name Regulus is Latin for ' prince ' or ' little king .'. Visitor Centers. Every 8 years, Venus passes very near the star system around or a few days before the heliacal rising, as on 5 September 2022 (the superior conjunction of Venus happens about two days earlier with each turn of its 8-year cycle, so as this cycle continues Venus will more definitely pass Regulus before the star's heliacal rising). Regulus A is only a few million years old. The Regulus BC pair can be observed in smaller instruments. Each of the 15 stars was associated with a planet, a plant, and a gemstone, and the latter two were used in rituals to bring out the star's influence. The stars projected rotational velocity is 128 km/s. This blog allows me to explore ideas and get reactions and suggestions from readers. 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. Due to the stars oblate shape, its poles are closer to the centre of mass and have a higher effective temperature and therefore brightness, while the equatorial region is cooler and less bright. Messier 65 is an intermediate spiral galaxy in Leo. "Regulus Star Facts & Features About The Little King". Regulus is best seen in late winter and spring in the northern hemisphere, when it rises high above the horizon in the evening. The star Regulus is known by many different names in different cultures. It has an apparent magnitude of 1.35 and is approximately 77 light years distant. Some Renaissance astrologers called it the Royal Star. It has a surface temperature of 4,885 Kelvin (8,333 F or 4,612 C), and it shines at a magnitude of 8.1. During the December 2026 occultation, Mars and Jupiter will be nearby. The Jupiter-Mars group: Regulus, Acturus, Altair, Antares If you have a Jupiter-Mars Star prominent on an angle, like your Ascendant or Midheaven, this gives you honour and skills with strategy. Regulus is actually a quadruple-star system composed of four stars that are organized into two pairs. So Regulus is visible at some time of night throughout the year, except for about a month on either side of August 22. Leo is one of the oldest constellations in the sky. This is interesting because Avatar also stars Zoe Saldana, a sirian starseed as the main character. NGC 3593 is a spiral galaxy in Leo. It contains a nuclear star-forming ring, almost 2000 light-years across, where a large proportion of the galaxys star formation takes place. The other components of the Alpha Leonis system are still on the main sequence, but considerably fainter than Regulus A. [4] When the stars were aligned accordingly, favourable conditions followed, and when they were negatively aligned, disaster was predicted. In the last 40 years of his life, he completed over 50 Messier Marathons and wrote 2 books on the subject. [1] The Persians believed that the sky was divided into four districts with each district being guarded by one of the four Royal Stars. Regulus was seen as the main star because it was in the constellation of Leo, giving it the power of the lion, signifying the strength of kings with large implications. [5] From this observation individuals began to denote them the royal stars. NGC 3842 is an elliptical galaxy, notable for having one of the largest black holes known. Regulus B is slightly hotter. The rotation of Regulus speeds at 700,000 mph (1.1 million kph) at its equator. Both phrases mean Lions Heart. This star is part of the Diamond of Virgo, along with Denebola (in Leos tail), Arcturus in Botes and Spica in Virgo. The central region of M95 has a ring-shaped starburst region around the core with a diameter spanning about 2,000 light years. Lambda Leonis is a K5-class star, about 336 light years from the Sun. Because Regulus was the most influential of the royal stars, events that took place while Regulus was in dominance were amplified and grave, foreshadowing destruction, depending on what planet or planets might be in conjunction with the star. Regulus appears below the Lions head and shoulders and marks its heart. Regulus, also known as Alpha Leonis, is the brightest star in the constellation Leo and the 21st brightest star in the night sky. It consists of two pairs of stars. The stars traditional naames, Ras Elased (Australis), Asad Australis and Algenubi, are derived from the Arabic phrase rs al-asad al-janb, which means the southern star of the lions head., Epsilon Leonis is 288 times more luminous than the Sun, four times as massive, and it has 21 times the solar radius. In the northern hemisphere, Leo is easily seen in the . They have apparent magnitudes of 8.1 (Regulus B) and 13.5 (Regulus C). History and mythology of Aldebaran. Messier 66 is an intermediate spiral galaxy in Leo. This new NASA/ESA Hubble Space Telescope shows Messier 96, a spiral galaxy just over 35 million light-years away in the constellation of Leo (The Lion). The components in the system are too close together to be able to resolve through a telescope. 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, Star Trek's bad captains: Celebrating Starfleet's less-than-perfect commanding officers, Best free Star Trek: TNG & Picard 3D prints.
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