HD 43691
HD 43691 is a G-type star with magnitude +8.03 located approximately 280 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.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 19m 34.6758s[1] |
| Declination | +41° 05′ 32.3053″[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: 22.727±0.089[1] mas/yr Dec.: −53.358±0.082[1] mas/yr |
| Parallax (π) | 11.6535 ± 0.0497[1] mas |
| Distance | 280 ± 1 ly (85.8 ± 0.4 pc) |
| Absolute magnitude (MV) | 8.57 |
| Details | |
| Mass | 1.21 ± 0.04[3] M☉ |
| Radius | 1.44 ± 0.03[3] R☉ |
| Luminosity | 2.24 ± 0.02[3] L☉ |
| Surface gravity (log g) | 4.19 ± 0.02[3] cgs |
| Temperature | 5920 ± 34[3] K |
| Age | 3.1 ± 2.5[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.57+0.31 −0.34 MJ |
0.238+0.014 −0.016 |
36.99913+0.00095 −0.00092 |
0.085+0.012 −0.011 |
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See also
- List of extrasolar planets
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- "HIC 30057". SIMBAD. Retrieved 2008-10-17.
- 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.
- 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.
- Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5.
- Hill, Michelle L.; Mocnik, Teo; Kane, Stephen R.; Henry, Gregory W.; Pepper, Joshua; Hinkel, Natalie R.; Dalba, Paul A.; Fulton, Benjamin J.; Stassun, Keivan G.; Rosenthal, Lee J.; Howard, Andrew W.; Howell, Steve B.; Everett, Mark E.; Boyajian, Tabetha S.; Fischer, Debra A.; Rodriguez, Joseph E.; Beatty, Thomas G.; James, David J. (2020). "Orbital Refinement and Stellar Properties for the HD 9446, HD 43691, and HD 179079 Planetary Systems". arXiv:2003.02385 [astro-ph.EP].
External links
- "Image HD 43691". SIMBAD. Retrieved 2008-10-17.
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