HD 173791

HD 173791 (30 G. Telescopium), also known as HR 7065, is a giant star in the constellation Telescopium, located about 358 light-years (110 parsecs) from Earth. It has an apparent magnitude of +5.8, allowing it to be viewed with the naked eye under suitable viewing conditions. The stellar classification is G8III, which indicates that it has evolved from a main sequence star and has expanded into a giant with three times the Sun's radius.[5] The effective temperature of its chromosphere is 5,200 K,[4] giving it the characteristic yellow hue of a G-type star.[8]

HD 173791
Observation data
Epoch J2000      Equinox
Constellation Telescopium
Right ascension 18h 49m 27.34329s[1]
Declination –45° 48′ 36.3665″[1]
Apparent magnitude (V) 5.802
Characteristics
Evolutionary stage Giant
Spectral type G8 III[2]
Astrometry
Radial velocity (Rv)9.7[3] km/s
Proper motion (μ) RA: 73.85[1] mas/yr
Dec.: 56.57[1] mas/yr
Parallax (π)9.10 ± 0.31[1] mas
Distance360 ± 10 ly
(110 ± 4 pc)
Absolute magnitude (MV)0.201
Details
Mass1[4] M☉
Radius3.0[5] R☉
Temperature5,200[4] K
Other designations
30 G. Telescopium,[6] HD 173791, CPD−45 9479, SAO 229306, FK5 3495, HIP 92367.[7]
Database references
SIMBADdata

It has an estimated lifespan of 10 billion years and has about the same mass as the Sun. After passing through the giant stage, its end state will probably be a carbon-oxygen white dwarf.[4]

References
  1. van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357
  2. Houk, Nancy (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", Ann Arbor : Dept. of Astronomy, Bibcode:1978mcts.book.....H
  3. 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, University of Toronto: International Astronomical Union, 30: 57, Bibcode:1967IAUS...30...57E
  4. Wolfram|Alpha: HIP 92367, WolframAlpha, October 26, 2011, archived from the original on January 10, 2012, retrieved 2011-12-16
  5. 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/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451 Note: see VizieR catalogue J/A+A/367/521.
  6. Gould, B. A., Uranometria Argentina, Reprinted and updated by Pilcher, F, archived from the original on 2012-02-27, retrieved 2012-01-06
  7. "HR 7065 -- Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-19
  8. "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 10, 2012, retrieved 2012-01-16


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