Gliese 673

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Gl 673
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 17h 25m 45.23266s[1]
Declination +02° 06′ 41.1208″[1]
Apparent magnitude (V) 7.492[2]
Characteristics
Spectral type K7V[2]
U−B color index 1.261[2]
B−V color index 1.373[2]
Astrometry
Radial velocity (Rv) −24.4[3] km/s
Proper motion (μ) RA: −579.66[1] mas/yr
Dec.: −1,184.76[1] mas/yr
Parallax (π) 129.86 ± 0.73[1] mas
Distance 25.1 ± 0.1 ly
(7.70 ± 0.04 pc)
Absolute magnitude (MV) 8.06[2]
Details
Radius 0.564[4] R
Surface gravity (log g) 4.70[5] cgs
Temperature 4,030[4] K
Metallicity [Fe/H] −0.20[5] dex
Rotation 11.94 days[6]
Age (205 ± 21) × 106[6] years
Other designations
GJ 673, BD +02°3312, HD 157881, LHS 447, LTT 15175, GCTP 3955.00, SAO 122374, Wolf 718, Vys 794, HIP 85295.[7]

Gliese 673 is an orange dwarf star in the constellation Ophiuchus. It has a stellar classification of K7V.[2] Main sequence stars with this spectra have a mass in the range of 60-70% of solar mass (comparable to the members of the binary star system 61 Cygni).

This star is relatively near our Sun at a distance of about 25 light years. In spite of this proximity, however, it is still too faint to be viewed by the unaided eye. It is considered a slowly rotating star with a relatively high proper motion.

References[edit]

  1. ^ a b c d e 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. ^ a b c d e f Koen, C. et al. (April 2010), "UBV(RI)C JHK observations of Hipparcos-selected nearby stars", Monthly Notices of the Royal Astronomical Society 403 (4): 1949–1968, Bibcode:2010MNRAS.403.1949K, doi:10.1111/j.1365-2966.2009.16182.x 
  3. ^ Nordström, B. et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs", Astronomy and Astrophysics 418: 989–1019, arXiv:astro-ph/0405198, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959 
  4. ^ a b van Belle, Gerard T.; von Braun, Kaspar (April 2009), "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars", The Astrophysical Journal 694 (2): 1085–1098, arXiv:0901.1206, Bibcode:2009ApJ...694.1085V, doi:10.1088/0004-637X/694/2/1085 
  5. ^ a b Frasca, A. et al. (December 2009), "REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters", Astronomy and Astrophysics 508 (3): 1313–1330, Bibcode:2009A&A...508.1313F, doi:10.1051/0004-6361/200913327 
  6. ^ a b Barnes, Sydney A. (November 2007), "Ages for Illustrative Field Stars Using Gyrochronology: Viability, Limitations, and Errors", The Astrophysical Journal 669 (2): 1167–1189, arXiv:0704.3068, Bibcode:2007ApJ...669.1167B, doi:10.1086/519295 
  7. ^ "LHS 447 -- High proper-motion Star", SIMBAD (Centre de Données astronomiques de Strasbourg), retrieved 2011-10-15 

External links[edit]