Corona Australis
Corona Australis is a small constellation bordered by Sagittarius to the north, Scorpius to the west, Telescopium to the south, and Ara to the southwest. Only visible at latitudes south of 53° north, Corona Australis cannot be seen from the British Isles as it lies too far south. Lying alongside the Milky Way, it contains one of the closest star-forming regions to the Solar System. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4. 1.
About Corona Australis in brief
Corona Australis is a small constellation bordered by Sagittarius to the north, Scorpius to the west, Telescopium to the south, and Ara to the southwest. Only visible at latitudes south of 53° north, Corona Australis cannot be seen from the British Isles as it lies too far south. Lying alongside the Milky Way, it contains one of the closest star-forming regions to the Solar System. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4. 1. The only star in the constellation to have received a name is Alfecca Meridiana or Alpha CrA. The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is \”CrA\”. The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon of four segments. In the equatorial coordinate system, the right ascension coordinates of these borders lie between 17h 58. 3m and 19h 19. 0m, while the declination coordinates are between −36. 77° and −45. 52°. Covering 128 square degrees, CoronaAustralis culminates at midnight around the 30th of June and ranks 80th in area. Though it has no stars brighter than 4th magnitude, it still has 21 stars visible to the unaided eye. It is currently a main-sequence star, but will eventually evolve into a white dwarf, which may be ringed by a ring of dust.
Since its formation, it has evolved from a B-type star to a yellow star of spectral type KII, and it is 474 light years from Earth. Its apparent magnitude is 4.0 and it has a luminosity 31 times greater, and a radius of 2.5 times that of the Sun. It has a complete revolution in its equator at its second at a second at its equatorial position of around 14 hours. The name of the constellation was entered as \”Corona. Australis\” when the IAU established the 88 modern constellations in 1922. In 1932, the name was instead recorded as\”Corona Austrina\” and the four-letter abbreviations were repealed in 1955. The IAU presently uses Corona Australis exclusively. Also called simply \”Meridiana\”, it is a white main sequence star located 125 light years away from Earth, with an apparent magnitude of 4.5III and apparent magnitude 5. 21. Its spectral type is type A type A, which indicates it may beRinged by excess infrared radiation, which means it may have a ringed disk of dust in its orbit. Since it is its second equator, it is currently an orange giant star, and its equatorial position is 11.0° north. Its light-years from Earth is 11.5° south. It can be seen in the southern sky from southern Europe and readily from the southern United States.
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This page is based on the article Corona Australis published in Wikipedia (as of Nov. 17, 2020) and was automatically summarized using artificial intelligence.
