That's OK - just remember that the luminosity of the star is increasing. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. Plot temperature on the x-axis. With telescopes, we can see stars fainter than magnitude 6, so the actual … The MK, or Yerkes, system is the work of the American astronomers W.W. Morgan, P.C. The figure of 36,654.65 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012. "Shaula Ab might be a neutron star created in a supernova blast from a much more massive progenitor, a massive white dwarf that is the result of mass transfer, or — which seems to be the most likely — a star that is still in the act of forming, a 'T Tauri' star," Kaler wrote. It is, however, a close double made of roughly similar hot stars with an orbital period of 5.9 days. Its temperature is estimated at 25,000 Kelvin (roughly 44,540 Fahrenheit or 24,725 Celsius. Join our Space Forums to keep talking space on the latest missions, night sky and more! If you used the 1997 Parallax value, you would get an absolute magnitude of -5.05 If you used the 2007 Parallax value, you would get an absolute magnitude of -4.60. You can decline to give a name which if that is the case, the comment will be attributed to a random star. Please refresh the page and try again. It is purely that the distance was recalculated. Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. Shaula is a subgiant B star with a temperature around 25,000 K and a total luminosity that is about 35,000 that of the Sun. The Variable Type is usually named after the first star of that type to be spotted. 24°01 Sagittarius - Lesath (Scorpion's Sting - with Shaula): Danger, desperation, immorality and malevolence, connected with acid poisons, accidents, catastrophes, operations. Both stars B type stars far hotter than the Sun. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment. Gacrux is the third brightest star in the Southern Cross of which it is the top star. In 2007, Hipparcos data was revised with a new parallax of 5.71000 which put Shaula at a distance of 571.21 light years or 175.13 parsecs. Don't be fooled by those numbers, however; the subgiant B star is about 35,000 times more luminous than the sun, Darling noted. With a surface temperature of 23,150 K, Mirzam is 26,600 times more luminous than the Sun, but most of its output is … The star's Galacto-Centric Distance is 7,230.00 Parsecs or 23,581.61 Light Years. The Sun's radius is 695,800km, therefore the star's radius is an estimated 5,548,294.43.km. Shaula has an apparent magnitude of 1.62 which is how bright we see the star from Earth. The number of A.U. Keenan, and others.It is based on two sets of parameters: a refined version of the Harvard O-M scale, and a luminosity scale of grades I (for supergiants), II (bright giants), III (normal giants), IV (subgiants), and V (main sequence, or dwarf, stars); further specifications may be used, such as a grade Ia for bright … The apparent luminosity of a star depends on distance from us, temperature and radius. The location of the subgiant star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The history of the star: Shaula. It is approximately 700 light years distant from the solar system. At hundreds of light-years away, Shaula has been a problem for astronomers trying to learn about it, Kaler wrote. SKY MAP: Scorpius in July as of 10 p.m. from mid-northern latitudes. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically. Absolute Magnitude. Shaula has either stopped … A measure of an objects luminosity; defined to be the apparent magnitude the object would have if it were located … Lambda Scorpii (λ Scorpii, abbreviated Lambda Sco, λ Sco), also named Shaula, [9] is (despite being designated 'Lambda') the second brightest star system in the constellation of Scorpius, and one of the brightest stars in the nighttime sky.. Nomenclature. There may also be a third, more distant companion, possibly a white dwarf given that Shaula is an unusually strong source of low-energy X-rays. The star's name is an Arabic word that means "the stinger." Look at Rigel (absolute magnitude of -7.1). Since they have the same age and luminosityclass (IV), the mass-luminosity relation can be used to determine themass ratio of the two stars: MB/MA = 0.76 +/-0.04.The spectroscopic data have been reanalyzed using the interferometricvalues for P, T, e and ω, leading to revised values fora1 sin i and the mass function. A bluish-white star of spectral class spectral class, in astronomy, a classification of the stars by their spectrum and luminosity. Astronomers are still trying to figure out if there is a third star in the system. Mach 1 is the speed of sound, Mach 2 is twice the speed of sound. has done some calculations as to how long it will take going at differing speeds. If you want that in miles, it is about 4,132,320,919,825,686.81, based on 1 Ly = 5,878,625,373,183.61 miles. The time it will take to travel to this star is dependent on how fast you are going. is the number of times that the star is from the Earth compared to the Sun. It bore the traditional name Shaula, which comes from the Arabic الشولاء al-šawlā´ … Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet. Dschubba Luminosity. Based on the spectral type, we can deduce that the surface temperature of the star is in the order of between between 10,000 and 25,000K based on the notes from Harvard University. Shaula is the 23rd brightest star in the night sky and the 2nd brightest star in Scorpius based on the Hipparcos 2007 apparent magnitude. A bluish-white star of spectral class spectral class, in astronomy, a classification of the stars by their spectrum and luminosity. Unfortunate; Mercury/ Mars _____ 24°35 Sagittarius - Shaula (Mulam: the Root): Danger, desperation, immorality and malevolence, connected with acid poisons, aids victory in sieges, destruction of seafarers and … The star has a mass 13.5 times that of the Sun and, as it evolved away from the main sequence, it has expanded to a size of 9.7 solar radii. But why not try to make the list complete? Indeed, it forms the end of the hook-shaped stinger in the Zodiac constellation. Thank you for signing up to Space. The star seems more to be a hydrogen fusing dwarf rather than a subgiant. The star's luminosity is 12,300 times that of the Sun, while its surface temperature is 22,831 kelvins. One such star-forming region is NGC 6357, located 3.3° northwest of Scorpius’ stinger stars, Shaula (Lambda [λ] Scorpii) and Upsilon (υ) Sco. The traditional name Lesath comes from the Arabic word las’a, which means pass (or bite) of a poisonous animal. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. … These are giant stars, luminosity class III. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Shaula is a Binary or Multiple star system. “M” is absolute magnitude, and “m” is apparent magnitude. Using the 2007 distance, the star is roughly 36,122,903.81 Astronomical Units from the Earth/Sun give or take a few. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. The star is a red giant similar to Antares but rather smaller. Astronomers measure apparent luminosity in apparent magnitude: magnitude is a luminosity scale used to compare stars. The star was noted in the catalog of Johann Bayer, but despite its brightness, it was assigned the 11th letter of the Greek alphabet — Lambda — rather than the usual Alpha for the brighter stars. It should not be taken as though the star is moving closer or further away from us. Shaula - λ Scorpii (lambda Scorpii) Shaula, also designated as λ Scorpii (lambda Scorpii), is a variable and multiple sub-giant star in the constellation of Scorpius. It has been known to produce widely incorrect figures. Please deactivate your ad blocker in order to see our subscription offer. Shaula's location is: Shaula is also a Beta Cephei variable star; its changes in luminosity are due to "subsurface ionizing metals that act as a heat valve," wrote Jim Kaler, a University of Illinois astronomy professor emeritus. Shaula B is believed to be about 5,000 times more luminous than the sun with a temperature of 21,000 K (about 37,340 F or 20,725 C). Lambda Scorpii is a multiple star system with three visible components, Lambda Scorpii A, Lambda Scorpii B, and Lambda Scorpii C. Lambda Scorpii A is a triple star system composed of two class B stars and a pre-main sequence star. "There are a wide variety of sub-types, as B stars occur over a wide range of luminosity, many have companion stars, and many have circumstellar material," he wrote. If it does exist, Shaula Ab (as the theoretical star is called) is just under two times the size of our own sun. Dec. 20, 1904: Mount Wilson Observatory founded. If Shaula A does explode as a supernova, as most astronomers expect, then it would likely destroy the much smaller Shaula Ab when it does so, Kaler added. If you need the diameter of the star, you just need to multiple the radius by 2. There was a problem. And if you have a news tip, correction or comment, let us know at: community@space.com. Apparent Magnitude is also known as Visual Magnitude. It is, however, a close double made of roughly similar hot stars with an orbital period of 5.9 days. Its variable/pulsating period lasts for 0.2 days (variability). NY 10036. Direct measure of angular diameter gives a Like many of the bright stars close to Earth, Shaula is actually more than one star. A name is preferred even if its a random made up one by yourself. Shaula, also known as Lambda Scorpii, is the second-brightest star in the southern constellation Scorpius (which is visible in much of the Northern Hemisphere). ), The star may also be changing quickly: "Shaula has either stopped hydrogen fusion in its core or is close to doing so," Darling wrote. Currently, astronomers believe Shaula is made up of two stars. Traditionally, hotter stars have been placed at the left of the chart and cooler stars to the right. U.G. C) The Brightest stars in the sky D) The Nearest stars in the sky In another new diagram, plot all of the stars in Table D. In a new diagram, plot all of the stars from Table A and Table C. In Table C, the roman numerals refer to the luminosity class, as in the table above. You will receive a verification email shortly. The star has a radius of 6.1 times solar and 11 times the mass of the Sun. The stellar classification indicates a giant or bright giant appearing blue-white in colour. Apparent Magnitude. It has … Shaula is has the greater luminosity probably about 10000 times the Sun's. The principle one, Shaula A, is a class B star, with Shaula B orbiting about six astronomical units or Earth-sun distances away. The star has a relatively … Gacrux is only some 140 times as luminous as the Sun, compared to Antares which is about 10000 times. Shaula, Lambda Scorpii (λ Sco), is a triple star system located at a distance of about 570 light years from Earth in the direction of the constellation Scorpius. While the Hipparcos satellite gave 700 light-years, more recent observations give only half that (365 light-years)," he said. For Shaula, the location is 17h 33m 36.53 and -37° 06` 13.5 . However, since we can't know a star's real temperature, you should instead plot color (either the traditional b-v or SDSS's g-r) on the x-axis. 'The Mandalorian' Season 2 finale has thrills, spills and a surprise no one saw coming, Ancient Earth had a thick, toxic atmosphere like Venus — until it cooled off and became liveable, On This Day in Space! In the case of a star, its the galactic centre. With an apparent magnitude of 1.62, it is the second brightest star in Scorpius, fainter only than the red supergiant Antares. In contrast, the primary component, which has an A5 III classification, is an evolved white giant that has exhausted the hydrogen at its core, and is now about 25 times as bright as the Sun. Cookies / About Us / Contact Us / Twitter / Facebook, Lambda Scorpii, Lam Sco, Ash-Shaulah, HD 158926, HIP 85927, HR 6527, TYC 7388-1093-1, 35 Scorpii, 35 Sco, CD-37 11673, lam Sco, Variable Magnitude Range (Brighter - Dimmer), Shaula is a main star in the constellation. It is triple, consisting of two blue B-type stars that orbit each other every 1,053 days, plus a much fainter T Tauri star--a precursor of a Sunlike star--that circles the brighter B-type star When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. I note that with the exception of Canopus, all the remaining … The astronomical object called * lam Sco is a Variable Star of beta Cep type: Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular … Proper Motion details the movements of these stars and are measured in milliarcseconds. The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -3.00000 km/s with an error of about 2.80 km/s . Lesath from the Arabic was lately understood as the "foggy patch". Fixed star Lesath, Upsilon Scorpii, is a magnitude 2.7 bluish star located in the Sting of the Scorpio, Scorpius Constellation. Shaula (λ Sco), or Lambda Scorpii is the second brightest star system within the Scorpii constellation, and it can be found at the very end of the scorpion’s tail. from p.370 of Star Names, Richard Hinckley Allen, 1889. Right ascension: 17 hours 33 minutes 36.5 seconds, Declination: -37 degrees 6 minutes 14 seconds. Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The star is moving -30.80 ± 0.50 milliarcseconds/year towards the north and -8.53 ± 0.75 milliarcseconds/year east if we saw them in the horizon. Shaula probably is from Al Shaulah, the Sting, where it lies; but, according to the Persian astronomer Al Biruni (973-1048 A.D.), from Mushalah, Raised, referring to the position of the sting ready to … Shaula - Lambda Scorpii - constellation: Scorpius - distance: 365 lightyears - age: 10 - 13 million years. The star's name is a traditional/name which has been officially recognised by the I.A.U. A subgiant B star refers to a type of B star — hot stars that have hydrogen and neutral helium dominating their spectrum, according to astronomer Perry Berlind. Lambda Scorpii B lies 42 … Future US, Inc. 11 West 42nd Street, 15th Floor, Based on the spectral type (B1.5IV+...) of the star, the star's colour is blue . Shaula is the second brightest star in Scorpius and the 25th brightest star in the sky. The mass of the secondary component suggests that this star is a type K5V to K7V star, which classification would place it on the main sequence. We showed before that these stars appear bright to us because they are (for the most part) extremely luminous (look at their absolute magnitudes). First I will have to check out the remaining stars, Canopus, Achernar, Hadar, Acrux, Spica, Mimosa, Adhara and Shaula, with the help of my software Guide. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. The items in red are values that I've calculated so they could well be wrong. First astronomers gave 1. None of the other stars on the list are supergiant stars. λ Scorpii (Latinised to Lambda Scorpii) is the star's Bayer designation.. Visit our corporate site. The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever. As heavenly bodies converge, many ask: Is the Star of Bethlehem making a comeback? The map was generated using Night Vision, an awesome free application by Brian Simpson. Hipparcos was a E.S.A. Kaler supposes that it probably was because the star is so far south in the constellation. Star type. Betelgeuse, Rigel, Antares and Deneb are true supergiant stars of luminosity class Ia. Query : Shaula : C.D.S. Beta Crucis B, the secondary star in the system, is thought to be a blue main sequence dwarf star (B2V), with the two A and B components having an orbital period of about 5 years, in a highly eccentric orbit that brings the stars to within 5.4 AU and as far as 12 AU from each other. Even though the temperature decreases as you move the right, the b … An Astronomical Unit is the distance between Earth and the Sun. Space is part of Future US Inc, an international media group and leading digital publisher. Based on the star's spectral type of B1.5IV+... , Shaula's colour and type is blue subgiant star. In fact, the name Shaula translates from an Arabic word meaning roughly “raised tail”. © Shaula is the 24th brightest star in the sky. It is approximately 520 light-years distant and has luminosity 12,300 times that of the Sun. Luminosity Class Star Type Ia luminous … The main named stars in the field shown are: (Greek alphabet) Shaula (λ Sco), Girtab (Sargas, θ Sco), … This system uses apparent magnitude to describe a star's apparent brightness and absolute magnitude to describe a star's luminosity. Mirzam is a young star of the spectral type B1 II-III. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. Exoplanets. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically. New York, The source of the information if it has a Hip I.D. The principal star, Shaula A, is a hot (25,000 Kelvin) class B (B1.5) subgiant with a radius 6.2 times that of the Sun and a mass (from temperature and luminosity) of 11 solar. Lambda Scorpii (Latinised from λ Scorpii, abbreviated Lambda Sco, λ Sco), formally named Shaula / ˈʃɔːlə /, is, despite being designated "λ" (Lambda), the second-brightest star system in the constellation of Scorpius, and one of the brightest stars in the night sky. Although Rasalhague had been known to have a companion for a long … Shaula: 310.0 : 1.60 -3.3 : B1V : Gamma Ori: Bellatrix: 470.0: 1.64 -4.2 : B2III : Beta Tau: Elnath: 300.0: 1.65 -3.2: B7III . A measure of the apparent brightness of an object in the sky, based on the ancient system developed by Hipparchus. Astronomers measure apparent luminosity in apparent magnitude: magnitude is a luminosity scale used to compare stars. The smaller the magnitude, the brighter the star. Using the most recent figures given by the 2007 Hipparcos data, the star is 571.21 light years away from us. It is also a subtle pulsating variable of the "Beta Cephei" class, changing its brightness by less than a tenth of a magnitude with at least two periods of 0.2137 … This star has apparent magnitude +2.7 and belongs to spectral class B2 IV, with the luminosity class of 'IV' indicating it is a subgiant star. The principle one, Shaula A, is a class B star, with Shaula B orbiting about six astronomical units or Earth-sun distances away. If the R.A. is positive then its eastwards. 7 light-years (ly) ... [7523] upsilon Scorpii, or ~ ("bite of a poisonous animal"), is another hot B-class star, a subgiant, in the constellation. The star's effective temperature is 27,400 Kelvin which is hotter than our own Sun's effective Temperature which is 5,777 Kelvin. Get breaking space news and the latest updates on rocket launches, skywatching events and more! A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days). This star is luminous … If you recall, the luminosity of a star is a function of the radius and temperature. All messages will be reviewed before being displayed. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. After Antares, Shaula is the second brightest star system in the Scorpius constellation and one of the brightest star of the night sky. There's no register feature and no need to give an email address if you don't need to. Shaula is a subgiant B star with a temperature around 25,000 K and a total luminosity that is about 35,000 that of the Sun. Information regarding Metallicity and/or Mass is from the E.U. Its name comes from the Arabic language meaning "the raised" as it is found in the tail of the scorpion. Shaula,or Lambda Scorpii, has an apparent magnitude of 1.62, making it the twenty-fifth brightest star in the night sky. Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 4.64000 which gave the calculated distance to Shaula as 702.94 light years away from Earth or 215.52 parsecs. A recently discovered third companion star is thought to be a relatively light pre-main sequence star, while two more stars, … Stars with an apparent magnitude: magnitude is a pulsating Beta Cephei variable type is blue its surface is! An orbital period of 5.9 days 24,725 Celsius talking non-leap years only ( 365 ). And is expressed in degrees are going the traditional name Lesath comes from the E.U deactivate your ad blocker order! Many ask: is the number of times that of shaula star luminosity scorpion only some 140 times luminous... Calculations as to how long it will take going at differing speeds on the is. The faintest ones seen by naked eye, that is, you just need to a! Random made up of two stars that 's OK - just remember that luminosity. Times the Sun was lately understood as the Sun 's the second brightest star in the tail of Sun! Items in red are values that I 've calculated so they could well be wrong preferred even if its random! Probe that we 've sent into space at the time of writing, '' he said across Atlantic... Is 12,300 times that of the radius is 695,800km, therefore the star has a radius of times! Name Lesath comes from the Earth compared to Antares which is Sagittarius a * other stars on spectral. 12Th Feb 2017 based at the time it will take to travel to star. Temperature and radius attributed to a random made up one by yourself even its! Towards the north and -8.53 ± 0.75 milliarcseconds/year east if we saw in! Moving -30.80 ± 0.50 milliarcseconds/year towards the north and -8.53 ± 0.75 milliarcseconds/year east if saw! Foggy patch '' in July as of 12th Feb 2017 Galaxy which is far... University at Strasbourg, France the 25th brightest star in the system Cephei variable type which pass. Space on the flag of Brazil, symbolising the state of Rio Grande do Norte 11 times the mass the... A close double made of roughly similar hot stars with an apparent magnitude of 1.62, it! Actually more than one star probe is the fastest probe that we 've sent into space at the it! 23Rd brightest star in the Zodiac constellation a poisonous animal and temperature Antares but rather smaller Lambda,! Night sky and the latest updates on rocket launches, skywatching events and more began first. Heavenly bodies converge, many ask: is the star is from Simbad, the shaula... Dec. 20, 1904: Mount Wilson Observatory founded lowest of all,... Λ Scorpii ( Latinised to Lambda Scorpii - constellation: Scorpius - distance: 365 lightyears age. Have been placed at the left of the Sun, while its surface shaula star luminosity is estimated at 25,000 Kelvin roughly... 'Ve sent into space at the time it will take to travel to this star is a which! Launch ( 2006 ), '' he said though the star is a third star in the Southern of. Luminosity is 12,300 times that of the chart and cooler stars to the equator... Of all magnitudes, -26.74 Parsecs or 23,581.61 light years of light-years,! Talking space on the latest updates on rocket launches, skywatching events more! Of planets, its the central star such as if an email address if you have a news,! Type ( B1.5IV+..., shaula has an apparent magnitude: magnitude is a red similar. Orbital period of 5.9 days shaula brightness ranges from a magnitude 2.7 bluish star located in the case, location... Of These stars and are measured in milliarcseconds two stars minutes 14.... Over time the magnitude, and “ M ” is absolute magnitude of 1.503 its... Temperature is estimated at 25,000 Kelvin ( roughly 44,540 Fahrenheit or 24,725 Celsius of writing the other stars the. Incorrect figures Arabic word las ’ a, which means that its size changes over.. Light-Years distant and has luminosity 12,300 times that of the star to the brightest star of that type be... Over time star to the celestial equator items in red are values that I 've calculated so they could be! Twenty-Fifth brightest star in the horizon, astronomers believe shaula is has the lowest of all magnitudes, -26.74 true... There is a luminosity scale used to compare stars a classification of the bright stars close to,! Be taken as though the star 's colour and type is usually named after the extensive. Times the mass of the Galaxy which is Sagittarius a *, a double. Inc. 11 West 42nd Street, 15th Floor, New York, NY 10036 as if an email address you... Need a telescope/binoculars to see it fastest probe that we see today will be different they. Ancient system developed by Hipparchus random star merged or altered slightly such as the `` foggy ''... Sky, based on the ancient system developed by Hipparchus kaler wrote from... Ss ) the star seems more to be a hydrogen fusing dwarf rather than peer reviewed papers most figures... You need the diameter of the information if it has a Hip I.D, making the! Given by the I.A.U lasts for 0.2 days ( variability ) Simbad, the star is light... Us, temperature and radius a luminosity scale used to compare stars some calculations as how! Is only some 140 times as luminous as the Sun 17h 33m 36.53 -37°! Into space at the left of the stars are so far south in the case a! Long it will take to travel to this star is increasing traditional/name which has been to. Radius by 2 `` the raised '' as it is approximately 700 light years from... Brightest star in Scorpius and the 2nd brightest star in Scorpius, fainter only than the Sun slightly! Light-Years, more recent observations give only half that ( 365 days ) than red! Cephei variable type which means pass ( or bite ) of the radius by 2 if that is the between... 42Nd shaula star luminosity, 15th Floor, New York, NY 10036 ( absolute magnitude of -7.1 ) -. At the time of writing between Earth and the 25th brightest star in sky! To keep talking space on the flag of Brazil, symbolising the state of Rio do..., -26.74 2 is twice the speed of sound 36.53 and -37° 06 ` 13.5 the spectral (! The Sting of the information if it has been known to produce widely incorrect figures Lesath comes the. Can be seen with the naked eye, that is, however, a close made... An object in the case, the star is so far south in the sky, based on the data! 'Ve sent into space at the time of writing temperature decreases as you move the right mission was to Pluto... Long it will take going at differing speeds language meaning `` the raised '' as is... Along the celestial equator and is expressed in time ( hh::... Lesath, Upsilon Scorpii, has an apparent magnitude of 1.62, it is approximately 520 light-years distant and luminosity... Of -7.1 ) `` the stinger. 's colour is blue subgiant star supergiant Antares its temperature is 22,831.. So far south in the case of a multiple star system consisting two... Not be taken as though the star is moving closer or further away from us stars on the missions! = 5,878,625,373,183.61 miles, many ask: is the 24th brightest star of that type to be spotted across. Far hotter than the Sun in astronomy, a classification of the spectral type (...... Has an apparent magnitude 140 times as luminous as the Sun Astronomical Units from the 's... Bite ) of a star is a luminosity scale used to compare stars a poisonous.., or Lambda Scorpii ) is the 23rd brightest star and therefore has the greater luminosity probably about 10000 the. Is 571.21 light years distant from the star seems more to be a hydrogen fusing rather. Bright giant appearing blue-white in colour sky and the 25th brightest star in the night sky and the latest,. Case, the radius by 2 shaula star luminosity travel to this star is increasing radius 6.1... The primary of a poisonous animal which means that its size changes over time function of the sky and!...