Cornelius Agrippa listed its kabbalistic sign under Vultur cadens, a literal Latin translation of the Arabic name. [18] Vega was the first star other than the Sun to be photographed and the first to have its spectrum recorded. Vega, Alpha Lyrae, is the brightest star in Lyra constellation and the fifth brightest star in the sky.. Vega is only fainter than Sirius in Canis Major, Canopus in Carina, Alpha Centauri in Centaurus, and Arcturus in Boötes constellation.. A proposed mechanism for maintaining the dust was a disk of coalesced bodies that were in the process of collapsing to form a planet. [15] For the Roman Empire, the start of autumn was based upon the hour at which Vega set below the horizon. In western skylore, Vegas constellation Lyra is said to be the harp played by the legendary Greek musician Orpheus. [88] This may be caused by an intense bombardment of comets or meteors, and may be evidence for the existence of a planetary system. At present, Vega has more than twice the mass[21] of the Sun and its bolometric luminosity is about 40 times the Sun's. [83] Models fitted to the dust distribution around Vega indicate that it is a 120 AU-radius circular disk viewed from nearly pole-on. A… Further research has been done and this event has been analyzed by Nilesh Oak based upon using astronomical calculations in his book on Mahabharata dating. The current age of this star is about 455 million years, or up to about half its expected total main-sequence lifespan. [28] From mid-southern latitudes, it can be seen low above the northern horizon during the Southern Hemisphere winter. In the southwestern sky, the Great Square of Pegasus stands high, with the constellation of Andromeda running from the Square’s top left corner star, which is actually part of Andromeda. The WGSN's first bulletin of July 2016[26] included a table of the first two batches of names approved by the WGSN; which included Vega for this star. At about 10,30 I saw what appeared to be a bright star just below and slightly left of Vega. The disk of dust is produced as radiation pressure from Vega pushes debris from collisions of larger objects outward. [35] Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. The faintest stars visible to the unaided eye are sixth magnitude, while the brightest in the night sky, Sirius, is of magnitude −1.46. It is now so entered in the IAU Catalog of Star Names. [81], Based on this star's kinematic properties, it appears to belong to a stellar association called the Castor Moving Group. The metallicity of Vega's photosphere is only about 32% of the abundance of heavy elements in the Sun's atmosphere. [76], The observed helium to hydrogen ratio in Vega is 0.030±0.005, which is about 40% lower than the Sun. (The estimated polar radius of this star is 2.362 ± 0.012 solar radii, while the equatorial radius is 2.818 ± 0.013 solar radii. Vega's spectral class is A0V, making it a blue-tinged white main sequence star that is fusing hydrogen to helium in its core. [12] If Vega is variable, then it may be a Delta Scuti type with a period of about 0.107 days. In the Galactic coordinate system, the space velocity components of Vega are (U, V, W) = (−16.1 ± 0.3, −6.3 ± 0.8, −7.7 ± 0.3) km/s, for a net space velocity of 19 km/s. (2012)[97] and the Herschel Space Telescope. The first person to publish a star's parallax was Friedrich G. W. von Struve, when he announced a value of 0.125 arcseconds (0.125″) for Vega. The bright star Vega is 25.3 ly from Earth. [71] By the Von Zeipel theorem, the local luminosity is higher at the poles. [54], Vega's spectral class is A0V, making it a blue-tinged white main sequence star that is fusing hydrogen to helium in its core. However, images by the Keck telescope had ruled out a companion down to magnitude 16, which would correspond to a body with more than 12 times the mass of Jupiter. Vega is one of six A0V stars that were used to set the initial mean values for this photometric system when it was introduced in the 1950s. By robhatherton, June 3, 2013 in Getting Started With Imaging. [68], Vega has a rotation period of 12.5 hours. This causes the equator to bulge outward due to centrifugal effects, and, as a result, there is a variation of temperature across the star's photosphere that reaches a maximum at the poles. Capella. Vega: The bright star that could have a family of planets (and even its own Earth twin) Astronomers have discovered evidence of an asteroid belt surrounding the star … That is, a vulture on the ground with its wings folded (Edward William Lane, Jupiter-mass planet on an eccentric orbit, "Hubble Space Telescope Absolute Spectrophotometry of Vega from the Far-Ultraviolet to the Infrared", "Astrometric Studies of Aldebaran, Arcturus, Vega, the Hyades, and Other Regions", "A New View of Vega's Composition, Mass, and Age", "Bulletin of the IAU Working Group on Star Names, No. The Summer Triangle is an asterism that includes three bright stars in the night sky: Vega, Deneb, and Altair. Of northwestern Victoria named it as Neilloan, [ 87 ] revealed evidence for an inner band... Models fitted to the star. [ 77 ] Bayer designation a period about... Addition, there is a 120 AU-radius circular disk viewed from nearly.. 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