HD 151967

HD 151967
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 16h 54m 00.36029s[1]
Declination −57° 54′ 34.2317″[1]
Apparent magnitude (V) 5.92[2]
Characteristics
Spectral type M1III[3]
U−B color index +1.92[2]
B−V color index +1.60[2]
Variable type Suspected
Astrometry
Radial velocity (Rv)-40.7[4] km/s
Proper motion (μ) RA: -40.18[1] mas/yr
Dec.: -123.26[1] mas/yr
Parallax (π)4.60 ± 0.47[1] mas
Distanceapprox. 710 ly
(approx. 220 pc)
Details
Radius53[5] R☉
Luminosity637[6] L☉
Temperature3,839[6] K
Other designations
NSV 20797, HD 151967, HR 6251, HIP 82672, SAO 244245.
Database references
SIMBADdata

HD 151967 is suspected variable star in the southern constellation of Ara. It is a sixth magnitude star,[2] which means it is just visible to the naked eye in dark skies. Parallax measurements place it at a distance of approximately 710 light years from the Earth.[1]

This is a red giant with a stellar classification of M1III;[3] it has expanded to 53[5] times the radius of the Sun and radiates 637[6] times the Sun's luminosity. The star varies in brightness by an amplitude of 0.0156 in magnitude over a period of 26 days.[7] The effective temperature of the outer atmosphere is 3,839 K,[6] giving it the ruddy hue of an M-type star.[8]

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 4 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M.
  3. 1 2 Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. ↑ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick, eds., "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E.
  5. 1 2 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289Freely accessible, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  6. 1 2 3 4 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037Freely accessible, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  7. ↑ Koen, Chris; Eyer, Laurent (March 2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv:astro-ph/0112194Freely accessible, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x.
  8. ↑ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, retrieved 2015-08-25.
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