Sigma1 Gruis

Sigma1 Gruis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 22h 36m 29.30757s[1]
Declination −40° 34′ 57.6836″[1]
Apparent magnitude (V) 6.26[2]
Characteristics
Spectral type A3 Vn[2]
B−V color index +0.12[2]
Astrometry
Proper motion (μ) RA: +46.00[1] mas/yr
Dec.: −72.64[1] mas/yr
Parallax (π)14.64 ± 0.42[1] mas
Distance223 ± 6 ly
(68 ± 2 pc)
Details[3]
Mass2.00 M☉
Radius2.0[4] R☉
Surface gravity (log g)4.24±0.14 cgs
Temperature9,230±314 K
Rotational velocity (v sin i)163.4±2.0[5] km/s
Age194 Myr
Other designations
σ1 Gru, CD−41° 14959, FK5 3811, HD 214085, HIP 111594, HR 8600, SAO 231211[6]
Database references
SIMBADdata

Sigma1 Gruis is a star in the constellation Grus. Its apparent magnitude is 6.28. Located around 68.31 parsecs (222.8 ly) distant, it is a blue-white main-sequence star of spectral type A3Vn, a star that is currently fusing its core hydrogen. It is a source of X-ray emission, which may indicate it has a stellar companion.[7]

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 Freely accessible, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 Evans, D. S. (1966), "Fundamental data for Southern stars (6th list)", Royal Observatory Bulletin, 110, Bibcode:1966RGOB..110..185E.
  3. ↑ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, Bibcode:2015ApJ...804..146D, arXiv:1501.03154 Freely accessible, doi:10.1088/0004-637X/804/2/146.
  4. ↑ Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics (3rd ed.), 367: 521–24, Bibcode:2001A&A...367..521P, arXiv:astro-ph/0012289 Freely accessible, doi:10.1051/0004-6361:20000451.
  5. ↑ Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics, 531: A143, Bibcode:2011A&A...531A.143D, arXiv:1012.4858 Freely accessible, doi:10.1051/0004-6361/201016386.
  6. ↑ "sig01 Gru -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-06-24.
  7. ↑ Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars", Astronomy and Astrophysics, 475 (2): 677−684, Bibcode:2007A&A...475..677S, doi:10.1051/0004-6361:20077429.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.