HD 154577

HD 154577
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 10m 10.3511s[1]
Declination −60° 43′ 43.576″[1]
Apparent magnitude (V) 7.385[2]
Characteristics
Spectral type K2.5V[3]
U−B color index +0.53[4]
B−V color index +0.89[4]
Astrometry
Radial velocity (Rv) +8.8[5] km/s
Proper motion (μ) RA: 71.14[1] mas/yr
Dec.: 589.81[1] mas/yr
Parallax (π) 73.07 ± 0.91[1] mas
Distance 44.6 ± 0.6 ly
(13.7 ± 0.2 pc)
Absolute magnitude (MV) 6.71[2]
Details
Mass 0.68[6] M☉
Surface gravity (log g) 4.70[3]
Temperature 4,850[3] K
Metallicity [M/H] = −0.59
Age 3.2[7] Gyr
Other designations
GJ 656, CD-60 6576, HD 154577, LHS 3268, LTT 6833, GCTP, SAO 253819, HIP 83990.[8]

HD 154577 (Gliese 656) is a solar-type star in the southern constellation Ara. It is a high proper motion star and is located about 45 light years from the Sun. This star has only 68% of the Sun's mass, a surface temperature of 4,850 K and a stellar classification of K2V, which indicates it is a K-type main sequence star. As of 2005, this star is not known to host any planets.[6] No excess of infrared radiation has been detected of the type that would indicate the presence of an orbiting debris disk.[7]

References

  1. ^ a b c d e Perryman, M. A. C.; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics 323: L49–L52. Bibcode 1997A&A...323L..49P. 
  2. ^ a b Holmberg, J.; Nordström, B.; Andersen, J. (July 2009). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics, Supplement Series 501 (3): 941–947. Bibcode 2009A&A...501..941H. doi:10.1051/0004-6361/200811191.  Note: see VizieR catalogue V/130.
  3. ^ a b c Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode 2006AJ....132..161G. doi:10.1086/504637. 
  4. ^ a b Cousins, A. W. J. (1973). "UBV photometry of some southern stars". Monthly Notes of the Astronomical Society of Southern Africa 32: 11. Bibcode 1973MNSSA..32...11C. 
  5. ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick. Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. http://adsabs.harvard.edu/abs/1967IAUS...30...57E. Retrieved 2009-09-10. 
  6. ^ a b Santos, N. C.; et al. (July 2005). "Spectroscopic metallicities for planet-host stars: Extending the samples". Astronomy and Astrophysics 437 (3): 1127–1133. arXiv:astro-ph/0504154. Bibcode 2005A&A...437.1127S. doi:10.1051/0004-6361:20052895. 
  7. ^ a b Lawler, S. M.; et al. (November 2009). "Explorations Beyond the Snow Line: Spitzer/IRS Spectra of Debris Disks Around Solar-type Stars". The Astrophysical Journal 705 (1): 89–111. Bibcode 2009ApJ...705...89L. doi:10.1088/0004-637X/705/1/89. 
  8. ^ "LHS 3268 -- High proper-motion star". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LHS+3268. Retrieved 2010-12-06.