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Arcturus

Arcturus is a red giant star in the northern constellation of Boötes, and the brightest star in the constellation. It has the Bayer designation α Boötis, which is Latinized to Alpha Boötis and abbreviated Alpha Boo or α Boo. With an apparent visual magnitude of −0.05, it is the fourth-brightest star in the night sky and the brightest in the northern…

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Apparent magnitude (J)
−2.25
Apparent magnitude (V)
−0.05
B−V color index
+1.23
Constellation
Boötes
Declination
+19° 10′ 56″
Evolutionary stage
Red giant branch

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Overview

Nomenclature

Observational history

Observation

Physical characteristics

Mythology

Cultural significance

In popular culture

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Arcturus

Nodes232
Edges231
Triples238
Avg. degree1.99
Density0.008621
Components1

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Arcturus

Top relations

related to Further reading · 96
Arcturus → A47, Active Longitudes, Adaptive Optics Observations, Alon, Angular, Arcturus Group, Asteroseismology, Astronomical Society, Astronomische Nachrichten, Astronomy, Astrophysics, August, Bensby, Bibcode, Bootis, Brown, Cohen, David, Detection, Differential
related to Observation · 26
Arcturus → April, Arc, Big Dipper, By, Canopus, Centauri, Centauri AB, Denebola, Earth's, From, Great Diamond, However, June, Northern Hemisphere, Plough, Regulus, Rigil Kentaurus, Sirius, Spica, Spring Triangle
related to Nomenclature · 18
Arcturus → Alpha Boötis, Arktouros, As, Bear, Boötis, Greek, Guardian, In, International Astronomical Union, Johann Bayer, July, Latinised, North, Star Names, The, The WGSN's, WGSN, Working Group
related to Mythology · 16
Arcturus → Almagest, Aratus, Arcas, Arctophylax, Arctos, Boötes, Callisto, Greek, Greeks, Hyginus's Astronomy, One, Phaenomena, Ptolemy, The, Ursa Major, Zeus
related to Physical characteristics · 11
Arcturus → Based, Because, Centauri, Closest, Earth, Hipparcos, In, It, Pollux, Sun, The
related to Search for planets · 11
Arcturus → Aldebaran, Earth, Hipparcos, However, In, Jupiter, Pollux, Recent, So, Sun, This
related to history · 10
Arcturus → Alramih, Astrolabe, French, Geoffrey Chaucer, In, Jean-Baptiste Morin, Ptolemy, Sun, This, Treatise
related to Spectrum · 9
Arcturus → As, Examination, Fe, It, K-type, K0III, K1, The, This
related to Oscillations · 8
Arcturus → April, As, Asteroseismological, Belmonte, Doppler, May, They, This
related to Cultural significance · 7
Arcturus → As, Hebrew Bible, It, Job, Orion, Pleiades, The Book

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Important terminology

star bibcode doi 10 s2cid stars constellation al sun et one called arxiv magnitude giant name astronomical boötes brightest around

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
ArcturusApparent magnitude (J)−2.251.00infobox
ArcturusApparent magnitude (V)−0.051.00infobox
ArcturusB−V color index+1.231.00infobox
ArcturusConstellationBoötes1.00infobox
ArcturusDeclination+19° 10′ 56″1.00infobox
ArcturusEvolutionary stageRed giant branch1.00infobox
ArcturusPronunciation/ɑːrkˈtjʊərəs/ ⓘ1.00infobox
ArcturusRight ascension14h 15m 39.7s1.00infobox
ArcturusR−I color index+0.651.00infobox
ArcturusSpectral typeK1.5 III Fe−0.51.00infobox
ArcturusU−B color index+1.281.00infobox
Arcturusis ared giant star in the northern constellation of Boötes0.90text
Arcturusis ared giant of spectral type K1.5III0.90text
Arcturusis abrightest star in the northern celestial hemisphere and the fourth-brightest star in the night sky0.90text
Arcturusis abinary star0.90text
Arcturusis azenith star of the Hawaiian Islands0.90text

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