Paul Hawcroft, Zashanell, Arcturus has an enrichment of alpha elements relative to iron but only about a third of solar metallicity. Subsequent spectral atlases[27][28][29] with greater wavelength coverage and superior signal-to-noise ratio made with digital detectors have supplanted the older work, but the Arcturus spectrum remains an important standard for stellar spectroscopy. [30] The star displays magnetic activity that is heating the coronal structures, and it undergoes a solar-type magnetic cycle with a duration that is probably less than 14 years. Jaydee's Taste Vocal, Nopopstar, The traditional name Arcturus derives from Ancient Greek Ἀρκτοῦρος (Arktouros) and means "Guardian of the Bear",[9] ultimately from ἄρκτος (arktos), "bear"[10] and οὖρος (ouros), "watcher, guardian". Culling its membership from various Norwegian black metal luminaries, Arcturus has been an evolving project for founding keyboardist Steiner "Sverd" Johnsen and drummer Hellhammer (also known as a member of Mayhem, one of the most infamous Norwegian black metal ensembles). Stylo, É visível do Hemisfério Norte de Março a Novembro. Walter, Philippe, Faccia M. [50] It was equated to the Tuamotuan constellation Te Kiva, meaning "frigatebird", which could either represent the figure of Boötes or just Arcturus. [14], An alternative lore associates the name with the legend around Icarius, who gave the gift of wine to other men, but was murdered by them, because they had had no experience with intoxication and mistook the wine for poison. With an apparent magnitude of -0.05, it is the brightest star in the northern celestial hemisphere, just outshining Vega and Capella. Recent results remain inconclusive, but do support the marginal Hipparcos detection of a binary companion. [20], In 1984, the 90 cm (36-inch) reflecting Yapp telescope at Herstmonceux was tested with an echelle spectrograph from Queen's University Belfast and a CCD camera. Welcome to Beatport. Alpha Portal Cornelius Agrippa listed its kabbalistic sign under the alternate name Alchameth. Prehistoric Polynesian navigators knew Arcturus as Hōkūleʻa, the "Star of Joy". 2JOHN'S, It is the brightest star in Boötes and the 4th brightest star in the sky. However, α Centauri AB is a binary star, whose components are both fainter than Arcturus. [36], In Arabic, Arcturus is one of two stars called al-simāk "the uplifted ones" (the other is Spica). Closest approach will happen in about 4,000 years, when the star will be a few hundredths of a light-year closer to Earth than it is today. It is stated this Icarius, became Arcturus, while his dog, Maira, became Canicula (Procyon), although "Arcturus" here may be used in the sense of the constellation rather than the star. Arcturus is moving rapidly (122 km/s) relative to the Sun, and is now almost at its closest point to the Sun. [32], As one of the brightest stars in the sky, Arcturus has been the subject of a number of studies in the emerging field of asteroseismology. [59], One of the possible etymologies offered for the name "Arthur" assumes that it is derived from "Arcturus" and that the early Medieval character on whom the myth of King Arthur is based was originally named for the star. Julian Gray, GMJ, [47], Arcturus had several names that described its significance to indigenous Polynesians. However, all three stars surveyed showed similar oscillations yielding similar companion masses, and the authors concluded that the variation was likely to be intrinsic to the star rather than due to the gravitational effect of a companion. [21] From the northern hemisphere, an easy way to find Arcturus is to follow the arc of the handle of the Big Dipper (or Plough). ), Artù. In the Society Islands, Arcturus, called Ana-tahua-taata-metua-te-tupu-mavae ("a pillar to stand by"), was one of the ten "pillars of the sky", bright stars that represented the ten heavens of the Tahitian afterlife. [34], Astronomers term "metals" those elements with higher atomic numbers than helium. [48] In Hawaii, the pattern of Boötes was called Hoku-iwa, meaning "stars of the frigatebird". Zeus averted their imminent tragic fate by transforming the boy into the constellation Boötes, called Arctophylax "bear guardian" by the Greeks, and his mother into Ursa Major (Greek: Arctos "the bear"). [18], With an apparent visual magnitude of −0.05, Arcturus is the brightest star in the northern celestial hemisphere and the fourth-brightest star in the night sky,[19] after Sirius (−1.46 apparent magnitude), Canopus (−0.72) and α Centauri (combined magnitude of −0.27).

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