Arcturus


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Related to Arcturus: Antares

Arcturus

(ärkto͝or`əs), brightest star in the constellation BoötesBoötes
[Gr.,=the herdsman], northern constellation located to the SE of the Big Dipper in Ursa Major and W of Corona Borealis, the Northern Crown. It contains the brilliant orange star Arcturus.
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 and 4th-brightest star in the entire sky; Bayer designation Alpha Boötis; 1992 position R.A. 14h15.3m, Dec. +19°13'. An orange giant of spectral classspectral class,
in astronomy, a classification of the stars by their spectrum and luminosity. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically.
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 K2 III, it has an apparent magnitudemagnitude,
in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. A.D.), all visible with the unaided eye, were ranked on a brightness scale such that the brightest stars were of 1st magnitude and the dimmest stars
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 of −0.06; its diameter is about 10 times that of the sun and its luminosity about 100 times that of the sun. Arcturus is one of the nearest giant stars, at a distance of about 36 light-years, and has one of the largest proper motionsproper motion,
in astronomy, apparent movement of a star on the celestial sphere, usually measured as seconds of arc per year; it is due both to the actual relative motions of the sun and the star through space. Proper motion reflects only transverse motion, i.e.
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 (annual angular shift in position) of the bright stars. Its name is from the Greek meaning "guardian of the bear," and it can be found by following the extension of the curve of the handle of the Big Dipper (Large Bear).

Arcturus

(ark-toor -ŭs, =tyoor -) (α Boo) A conspicuous red giant that is the brightest star in the constellation Boötes and the second-brightest star in the northern sky (after the Sun). The three stars Alioth, Mizar, and Alcaid in the handle of the Big Dipper point in its direction. Arcturus is a high-velocity star and shows spectral peculiarities. mv : –0.04; Mv : –0.2; spectral type: K2 IIIp; radius (by interferometer): 28 times solar radius; distance: 10 pc.

Arcturus

[‚ärk′tu̇r·əs]
(astronomy)
A star that is 36 light-years from the sun; spectral classification K2IIIp. Also known as α Boötes.
References in periodicals archive ?
Economic assessment for the first 17 years of mine life for the Arcturus Project envisages 70.
Springsure Creek and Arcturus projects are located within 14 km of each other in Bandanna's so called "Golden Triangle" of projects.
Thorough and rigorous environmental assessments of Springsure Creek, Arcturus and Dingo West are also being undertaken to gain approvals in accordance with the relevant environmental legislation and approvals processes,'' Dr Shaw said.
Freescale's M53281KIT is a VoIP reference platform, evaluation and development kit featuring a host board, VoIP module based on the ColdFire[R] MCF53281 MCU family, VoIP voice processing software and a Middleware stack from Arcturus.
Dr Ray Shaw further confirmed "the commencement of the environmental approvals process for the Springsure Creek and Arcturus projects, together with the Dingo West coal project, is seen as a key step in moving from explorer to producer, and further underpins the company's involvement in the development of the Wiggins Island Coal Export Terminal at Gladstone".
Arcturus Therapeutics is an excellent example of the region's entrepreneurial spirit.
It is dominated by Arcturus, a brilliant orange star and the fourth brightest star in the entire sky.
Some astronomers said good nights for viewing, weather permitting, will be Thursday and Friday nights this week when the comet can be seen almost overhead near the very bright star Arcturus.
Investors in the company include Solstice Capital, Valley Ventures, Merck Capital Ventures, Village Ventures and Arcturus Capital.
introduces the newest model in its Arcturus Bay Light series.