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Beta Scorpii information


β Scorpii
Location of β Scorpii (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
HR 5984
Right ascension 16h 05m 26.23198s[1]
Declination –19° 48′ 19.6300″[1]
Apparent magnitude (V) 2.62[2]
HR 5985
Right ascension 16h 05m 26.57128s[1]
Declination –19° 48′ 06.8556″[1]
Apparent magnitude (V) 4.92[2]
Characteristics
HR 5984
Spectral type B1V[3] (B0.5IV-V + B1.5V)[4]
U−B color index –0.08[5]
B−V color index –0.08[5]
HR 5985
Spectral type B2V[3]
U−B color index –0.70[5]
B−V color index –0.02[5]
Astrometry
HR 5984
Radial velocity (Rv)–1.0[6] km/s
Proper motion (μ) RA: –5.20[1] mas/yr
Dec.: –24.04[1] mas/yr
Parallax (π)8.07 ± 0.78 mas[1]
Distance400 ± 40 ly
(120 ± 10 pc)
Absolute magnitude (MV)–3.92 / –2.60[7]
HR 5985
Radial velocity (Rv)–3.6[6] km/s
Proper motion (μ) RA: –5.07[1] mas/yr
Dec.: –25.87[1] mas/yr
Parallax (π)8.19 ± 1.17 mas[1]
Distanceapprox. 400 ly
(approx. 120 pc)
Absolute magnitude (MV)–1.83 (Ea: +0.24)[7]
Details[7]
β Sco Aa
Mass15.0 M
Radius6.3 R
Luminosity31,600 L
Temperature28,000 K
β Sco Ab
Mass10.4 M
Radius4.0 R
Luminosity7,900 L
Temperature26,400 K
β Sco C
Mass8.2 M
Radius2.9 R
Luminosity3,200 L
Surface gravity (log g)3.8 cgs
Temperature24,000 K
Rotational velocity (v sin i)55 km/s
β Sco Ea
Mass3.5 M
Radius2.4 R
Luminosity126 L
Surface gravity (log g)4.2 cgs
Temperature13,000 K
Rotational velocity (v sin i)5 km/s
Age6.3 Myr
Other designations
Acrab, Elacrab, Graffias, 8 Scorpii, ADS 9913, WDS J16054-1948
β1 Sco: BD–19 4307, HD 144217, HIP 78820, HR 5984
β2 Sco: BD–19 4308, HD 144218, HIP 78821, HR 5985
Database references
SIMBADβ Scorpii
β1 Scorpii
β2 Scorpii

Beta Scorpii (β Scorpii, abbreviated Beta Sco, β Sco) is a multiple star system in the southern zodiac constellation of Scorpius. It bore the traditional proper name of Acrab /ˈækræb/,[8] though the International Astronomical Union now regards that name as applying only to the β Scorpii Aa component.

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  7. ^ a b c Cite error: The named reference catanzaro was invoked but never defined (see the help page).
  8. ^ Rumrill, H. B. (June 1936). "Star Name Pronunciation". Publications of the Astronomical Society of the Pacific. 48 (283). San Francisco, California: 139. Bibcode:1936PASP...48..139R. doi:10.1086/124681. S2CID 120743052.

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consisting of λ Scorpii, ε Scorpii, ζ1 Scorpii, ζ2 Scorpii, η Scorpii, θ Scorpii, ι1 Scorpii, ι2 Scorpii, κ Scorpii, μ1 Scorpii, and υ Scorpii. Consequently...

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Pi Scorpii

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consisting of Pi Scorpii, Rho Scorpii, Delta Scorpii, Beta¹ Scorpii and Beta² Scorpii. Consequently, the Chinese name for Pi Scorpii itself is 房宿一 (Fáng...

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Sigma Scorpii

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components designated Sigma Scorpii Aa1 (officially named Alniyat /ælˈnaɪjæt/, the traditional name for the entire star system) and a Beta Cephei variable) and...

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Rho Scorpii

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Nu Scorpii. The corresponding asterism in Chinese astronomy, 房宿 (Fáng Xiù), meaning Room, consists of Rho Scorpii, Pi Scorpii, Delta Scorpii, Beta¹ Scorpii...

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List of Arabic star names

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آخِرُ ٱلْنََهْر Alpha Eridani Acrab ʽAqrab the Scorpion عقرب عَقْرَب Beta Scorpii Acubens ʼaz-Zubānā the Claw / Dart / Sting الزبانى الْزُّبَانَى Alpha...

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List of brightest natural objects in the sky

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system 1.62 Lambda Scorpii Triple star system 1.64 1.59 Bellatrix Star 1.64 Gacrux Star 1.65 Beta Tauri Star 1.69 1.64 Alnilam Star 1.69 Beta Carinae Star 1...

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Menelaus of Alexandria

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January of the year 98. These were occultations of the stars Spica and Beta Scorpii by the moon, a few nights apart. Ptolemy used these observations to confirm...

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Flag of Brazil

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stars are meant to be placed (i.e. as found on a celestial globe). Thus Beta Crucis appears to the right of the constellation and Delta Crucis to the...

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Planetary transits and occultations

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1965 15:30 Mercury Eta Virginis 2.6° West 13 May 1971 20:00 Jupiter Beta Scorpii (both components) 169.5° West 8 April 1976 01:00 Mars Epsilon Geminorum...

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Kappa Scorpii

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ζ1 Scorpii and ζ2 Scorpii, η Scorpii, θ Scorpii, ι1 Scorpii and ι2 Scorpii, λ Scorpii and υ Scorpii. Consequently, the Chinese name for κ Scorpii itself...

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Interstellar medium

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atom's "D" lines at 589.0 and 589.6 nanometres towards Delta Orionis and Beta Scorpii. In the series of investigations, Viktor Ambartsumian introduced the...

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Exploration of Io

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diameter and shape came from the observations of an occultation of the star Beta Scorpii C on May 14, 1971, where a diameter of 3,636 km (2,259 mi) was found...

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Mu1 Scorpii

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Scorpii, Epsilon Scorpii, Zeta1 Scorpii and Zeta2 Scorpii, Eta Scorpii, Theta Scorpii, Iota1 Scorpii and Iota2 Scorpii, Kappa Scorpii, Lambda Scorpii...

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Akrab

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free dictionary. Akrab may refer to: Akrab, Kazakhstan Aqrab, Syria Beta Scorpii, a star This disambiguation page lists articles associated with the title...

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Xi Scorpii

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was applied to Beta Scorpii. Its Flamsteed designation is 51 Librae. When the modern constellation boundaries were drawn, Xi Scorpii was assigned to...

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in 1913. Beta Canis Majoris and Sigma Scorpii were found to be variable not long afterwards, Vesto Slipher noted in 1904 that Sigma Scorpii's radial velocity...

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USS Graffias

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Navy to have this name. The name Graffias is another name for the star Beta Scorpii in the constellation Scorpius. The Graffias was originally laid down...

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David Stanley Evans

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at the Cape,” and participated in measurements of the occultation of Beta Scorpii by Jupiter in 1972 and the apparent gravitational displacement of stars...

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Table of stars with Bayer designations

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Bayer’s Uranometria and Bayer letters Catalogued by Bayer as Gamma Scorpii (γ Sco, γ Scorpii), reassigned by Gould to Libra - Burnham, Robert (1978), Burnham's...

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National Australian Convention of Amateur Astronomers

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For 1973 Mr Sid Elwin Photometric observations of the occultation of Beta' Scorpii by Jupiter 1975 Mr Dave Herald Observations of Baily Beads in the solar...

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Bayer designation

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modern constellation Carina. Norma's Alpha and Beta were reassigned to Scorpius and re-designated N and H Scorpii respectively, leaving Norma with no Alpha...

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Frank McClean

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the presence of oxygen in spectrographs from Beta Scorpii, Beta Canis Majoris, Beta Centauri, and Beta Crucis. His spectrographic survey of the stars...

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Giant star

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giants include: Canopus Epsilon Canis Majoris Omicron Scorpii Theta Scorpii Beta Draconis Beta Capricorni Alpha Herculis Gamma Canis Majoris Within any...

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Omega1 Scorpii

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ω1 Scorpii, Latinised as Omega1 Scorpii, is a star in the zodiac constellation of Scorpius. With an apparent visual magnitude of 3.95 it can be seen with...

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Behenian fixed star

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Borealis 12 Scorpio 34 Venus & Mars topaz rosemary Antares Cor scorpii Alpha Scorpii 10 Sagittarius 01 Venus & Jupiter sardonyx birthwort Vega Vultur...

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