Zeta¹ Scorpii
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 53m 59.7269s[1] |
| Declination | −42° 21′ 43.290″[1] |
| Apparent magnitude (V) | 4.66 to 4.86[2] |
| Characteristics | |
| Spectral type | B1Iape[1] |
| U-B color index | −0.56[3] |
| B-V color index | +0.49[3] |
| Variable type | SDOR:[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 | |
| Mass | 60[4] M☉ |
| Radius | 52[6] R☉ |
| Luminosity (bolometric) | 1,700,000[7] L☉ |
| Rotational velocity (v sin i) | 57[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
- 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
- ^ a b c d e f g h HIP 82671 -- Emission-line Star, database entry, SIMBAD. Accessed on line November 20, 2009.
- ^ 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.
- ^ 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.
- ^ a b c Zeta-1 Sco, Stars, Jim Kaler. Accessed on line November 20, 2009.
- ^ p. 101, Extreme stars: at the edge of creation, James B. Kaler, Cambridge University Press, 2001, ISBN 052140262X.
- ^ 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.
- ^ a b Bolometric luminosity computed from Mbol(ζ1 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.
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