HR 6094

HR 6094 A/B
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 16h 24m 01.2899s[1]
Declination –39° 11′ 34.729″[1]
Apparent magnitude (V) 5.376[2]
Characteristics
Spectral type G5V
U−B color index +0.13[3]
B−V color index +0.62[3]
Astrometry
Radial velocity (Rv) 10.1[4] km/s
Proper motion (μ) RA: 72.64[1] mas/yr
Dec.: 3.41[1] mas/yr
Parallax (π) 77.69 ± 0.86[1] mas
Distance 42 ± 0.5 ly
(12.9 ± 0.1 pc)
Details
Surface gravity (log g) 4.50[5]
Temperature 5,858[5] K
Metallicity \begin{smallmatrix}\left[\frac{Fe}{H}\right]\ =\ 0.03\end{smallmatrix}[5]
Rotational velocity (v sin i) 1.55[6] km/s
Age 0.3[7] Gyr
Other designations
62 G. Scorpii, GJ 9559, CD-38 10983, HD 147513, SAO 207622, FK5 3295, HIP 80337.[2]

HR 6094 (62 G. Scorpii) is a binary star system located 42.0 light years (12.9 parsecs) from Earth in the constellation Scorpius. The star system comprises two stars that have an observed separation of 5360 AU.[7]

Component A

Component A is a sun like star of spectral class G3-5 and luminosity class V, an apparent visual magnitude of +5.39 and an absolute visual magnitude of +4.84. The visual luminosity of star A is 1.01 × the sun and it has a diameter of 1.08 Sol.

This star is a member of the Ursa Major moving group of stars that share a common proper motion through space. The atmosphere of the star is enriched in barium and deficient in carbon. This change in composition occurred when the companion passed through the asymptotic giant branch and contaminated this star's photosphere.[7]

The habitable zone for an Earthlike planet round this star would locate around 1.00 A.U.s from the star and star B would appear as magnitude -2.85 object.

An extrasolar planet, designated HD 147513 Ab, which is at least as large as Jupiter, orbits component A in a highly eccentric orbit at a mean distance of 1.26AU. It was discovered on 18 June 2002.[8]

Component B

Component B is a star of spectral class of DA2. It has an apparent visual magnitude of +11.00. The habitable zone for an Earth-type planet round this star would be 0.076 A.U.s. and star A would appear as a magnitude -8.46 object.

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 "HD 147513 -- Pre-main sequence Star". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+6094. Retrieved 2010-07-01. 
  3. ^ a b Corben, P. M.; Carter, B. S.; Banfield, R. M.; Harvey, G. M. (1972). "UBV Photometry of 500 Southern Stars [erratum: 1973MNSSA..32...48C]". Monthly Notes of the Astronomical Society of Southern Africa 31: 7. Bibcode 1972MNSSA..31....7C. 
  4. ^ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode 1953QB901.W495...... 
  5. ^ a b c Sousa, S. G.; et al. (August 2008). "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes". Astronomy and Astrophysics 487 (1): 373–381. Bibcode 2008A&A...487..373S. doi:10.1051/0004-6361:200809698. 
  6. ^ Butler, R. P.; et al. (July 2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode 2006ApJ...646..505B. doi:10.1086/504701. 
  7. ^ a b c Porto de Mello, G. F.; da Silva, L.. "HR 6094: A Young, Solar-Type, Solar-Metallicity Barium Dwarf Star". Astrophysical Journal Letters 476: L89. Bibcode 1997ApJ...476L..89P. doi:10.1086/310504. 
  8. ^ http://solstation.com/stars2/hr6094ab.htm