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definition - Zeta¹_Scorpii

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Zeta¹ Scorpii

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ζ1 Scorpii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
ConstellationScorpius
Right ascension16h 53m 59.7269s[1]
Declination−42° 21′ 43.290″[1]
Apparent magnitude (V)4.66 to 4.86[2]
Characteristics
Spectral typeB1Iape[1]
U-B color index−0.56[3]
B-V color index+0.49[3]
Variable typeSDOR:[2]
Astrometry
Radial velocity (Rv)−26.0 ± 0.9[1] km/s
Proper motion (μ)RA: −0.48[1] mas/yr
Dec.: −2.17[1] mas/yr
Distance~5700[4] ly
(~1700 pc)
Absolute magnitude (MV)−8.7[5]
Details
Mass60[4] M
Radius52[6] R
Luminosity (bolometric)1,700,000[7] L
Rotational velocity (v sin i)57[3] km/s
Other designations
ζ1 Sco, Zeta1 Scorpii, Zeta1 Sco, CD−42 11633, CPD−42 7545, GC 22730, HD 152236, HIP 82671, HR 6262, PPM 322342, SAO 227375.[1]
Database references
SIMBADdata
For other stars with this Bayer designation, see Zeta Scorpii.

Zeta1 Scorpii (Zeta1 Sco / ζ1 Scorpii / ζ1 Sco) is a B-type supergiant star in the constellation of Scorpius.[1] It has an apparent visual magnitude which varies between 4.66 and 4.86.[2] It is one of the most massive stars in the Galaxy, with an estimated mass of approximately 60 solar masses, and is a member of the Scorpius OB1 association.[4] It is also one of the most luminous stars known in the Galaxy, with an estimated bolometric luminosity of approximately 1.7 million times the Sun's.[7]

References

  1. ^ a b c d e f g h HIP 82671 -- Emission-line Star, database entry, SIMBAD. Accessed on line November 20, 2009.
  2. ^ a b c zet 1 Sco, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 20, 2009.
  3. ^ a b c HR 6262, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 20, 2009.
  4. ^ a b c Zeta-1 Sco, Stars, Jim Kaler. Accessed on line November 20, 2009.
  5. ^ p. 101, Extreme stars: at the edge of creation, James B. Kaler, Cambridge University Press, 2001, ISBN 052140262X.
  6. ^ HD 152236, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line November 20, 2009.
  7. ^ a b Bolometric luminosity computed from Mbol1 Sco) = −10.8 and Mbol(Sun) = 4.75. See p. 101, Extreme stars: at the edge of creation, James B. Kaler, Cambridge University Press, 2001, ISBN 052140262X.

 

All translations of Zeta¹_Scorpii


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