Astronomy:HD 151967

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Short description: Star in the constellation Ara
HD 151967
Observation data
Equinox J2000.0]] (ICRS)
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
CPD−57° 8157, 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. 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode2007A&A...474..653V. 
  2. 2.0 2.1 2.2 2.3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode1986EgUBV........0M. 
  3. 3.0 3.1 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, Bibcode1978mcts.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), Bibcode1967IAUS...30...57E. 
  5. 5.0 5.1 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, doi:10.1051/0004-6361:20000451, Bibcode2001A&A...367..521P. 
  6. 6.0 6.1 6.2 6.3 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode2012MNRAS.427..343M. 
  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, doi:10.1046/j.1365-8711.2002.05150.x, Bibcode2002MNRAS.331...45K. 
  8. "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html, retrieved 2015-08-25. 

External links