HD 43691

HD 43691
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 19m 34.68s[1]
Declination +41° 05′ 32.3″[1]
Apparent magnitude (V) 8.03
Characteristics
Spectral type G0IV
B−V color index 0.596[2]
Astrometry
Radial velocity (Rv)-29.2 ± 0.2 km/s
Proper motion (μ) RA: 23.12 ± 0.94[1] mas/yr
Dec.: -51.92 ± 0.62[1] mas/yr
Parallax (π)12.44 ± 0.83[1] mas
Distance260 ± 20 ly
(80 ± 5 pc)
Absolute magnitude (MV)8.57
Details
Mass1.21 ± 0.04[3] M☉
Radius1.44 ± 0.03[3] R☉
Luminosity2.24 ± 0.02[3] L☉
Surface gravity (log g)4.19 ± 0.02[3] cgs
Temperature5920 ± 34[3] K
Age3.1 ± 2.5[3] Gyr
Other designations
BD+41° 1415, HIP 30057, SAO 41025, GSC 02930-02105, 2MASS J06193467+4105321, TYC 2930-2105-1, PPM 48960
Database references
SIMBADdata

HD 43691 is a G-type star with magnitude +8.03 located approximately 260 light-years away in the constellation Auriga. This yellow star is about to stop thermonuclear hydrogen-fusion in its core and eventually expand to become a red giant.

Planetary system

In July 2007, the star is found to have a giant planet in orbit around it.[4] It has minimum mass two and a half times that of Jupiter and orbits the star closer than Mercury to the Sun.

The HD 43691 planetary system[4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >2.49 MJ 0.24 36.96 ± 0.02 0.14 ± 0.02 — —

See also

References

  1. 1 2 3 4 5 van Leeuwen, F. (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. Vizier catalog entry
  2. ↑ "HIC 30057". SIMBAD. Retrieved 2008-10-17.
  3. 1 2 3 4 5 6 Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
  4. 1 2 da Silva, R.; et al. (2007). "ELODIE metallicity-biased search for transiting Hot Jupiters IV. Intermediate period planets orbiting the stars HD 43691 and HD 132406". Astronomy and Astrophysics. 473 (1): 323–328. arXiv:0707.0958. Bibcode:2007A&A...473..323D. doi:10.1051/0004-6361:20077314.
  • "Image HD 43691". SIMBAD. Retrieved 2008-10-17.

Coordinates: 06h 19m 34.6771s, +41° 05′ 32.302″


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