RADEON's video: UY SCUTI LARGEST STAR EVER DISCOVERD

Video Title : UY SCUTI LARGEST STAR EVER DISCOVERD ! . . . UY Scuti was first cataloged in 1860, by German astronomers at the Bonn Observatory, during the first sky survey of stars for the Bonner Durchmusterung Stellar Catalogue.[10] It was named BD-12 5055, the 5,055th star between 12°S and 13°S counting from 0h right ascension. . On the next detection of the star in the second survey, it was found to have changed slightly in brightness, suggesting that it was a new variable star. In accordance with the international standard of designation of variable stars, it was called UY Scuti, the 38th variable star of the constellation Scutum (see variable star designation).[11] . UY Scuti is located a few degrees north of the A-type star Gamma Scuti and northeast of the Eagle Nebula. Although the star is very luminous it is, at its brightest, only 9th magnitude as viewed from Earth, due to its distance and location in the Zone of Avoidance within the Cygnus rift.[12] .UY Sct is a dust-enshrouded red supergiant[13] and is classified as a semiregular variable with an approximate pulsation period of 740 days.[5][14][15] . In the summer of 2012, Arroyo-Torres et al. using AMBER interferometry from the Very Large Telescope (VLT) in the Atacama Desert in Chile measured the parameters of three red supergiants near the Galactic Center region:[3] UY Scuti, AH Scorpii, and KW Sagittarii. They determined that all three stars are over 1,000 times bigger than the Sun and over 100,000 times more luminous than the Sun. The stars' sizes were calculated using the Rosseland radius, the location at which the optical depth is ​2⁄3,[16] with distances adopted from earlier publications. UY Scuti was found to be the largest and the most luminous of the three stars measured, at 1,708 ± 192 R☉ (1.188×109 ± 134,000,000 km; 7.94 ± 0.89 AU) based on an angular diameter of 5.48±0.10 mas and an assumed distance of 2.9±0.317 kiloparsecs (kpc) (about 9,500±1,030 light-years) which was originally derived in 1970 based on the modelling of the spectrum of UY Sct.[9] The luminosity is then calculated to be 340,000 L☉ at an effective temperature of 3,365 ± 134 K, giving an initial mass of 25 M☉ (possibly up to 40 M☉ for a non-rotating star) . . . Powered by : RADEON X . THANKS FOR WATCHING ! . @LIKE,@SHARE AND @SUBSCRIBE FOR MORE...