1 Scorpii

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1 Scorpii (b Scorpii)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
Right ascension 15h 50m 58.745s
Declination −25° 45′ 04.66″
Apparent magnitude (V) +4.638
Characteristics
Spectral type B1.5Vn
U−B color index -0.73
B−V color index -0.06
Variable type Gamma Cassiopeiae
Astrometry
Radial velocity (Rv) -3.00 km/s
Proper motion (μ) RA: -14.20 ± 0.33 mas/yr
Dec.: -25.12 ± 0.26 mas/yr
Parallax (π) 6.59 ± 0.27 mas
Distance 490 ± 20 ly
(152 ± 6 pc)
Absolute magnitude (MV) -1.38
Details
Mass 10.3[1] M
Radius 3.7[1] R
Luminosity 3,890[1] L
Temperature 24,000[1] K
Rotational velocity (v sin i) +310[2] km/s
Other designations
1 Scorpii, b Scorpii, HD 141637, HIP 77635
Database references
SIMBAD data

1 Scorpii is a star in the constellation of Scorpius. This star has an apparent magnitude of 4.63. It rotates extremely rapidly, is severely oblate, and due to this is a small amplitude variable star.

See also[edit]

References[edit]

  1. ^ a b c d Hernández, J. S.; Calvet, N.; Hartmann, L.; Briceño, C. S.; Sicilia-Aguilar, A.; Berlind, P. (2005). "Herbig Ae/Be Stars in nearby OB Associations". The Astronomical Journal 129 (2): 856. doi:10.1086/426918.  edit
  2. ^ Belle, G. T. (2012). "Interferometric observations of rapidly rotating stars". The Astronomy and Astrophysics Review 20. doi:10.1007/s00159-012-0051-2.  edit