HD 169830
HD 169830 is a yellow-white dwarf star (spectral type F9V) in the constellation of Sagittarius, 118.46 light years from the Solar System. It is known to be orbited by two large Jupiter-like planets.
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Sagittarius |
Right ascension | 18h 27m 49.48s [1] |
Declination | –29° 49′ 00.7″ [1] |
Apparent magnitude (V) | +5.911 |
Characteristics | |
Spectral type | F7V |
B−V color index | 0.475 |
Variable type | “None” |
Astrometry | |
Radial velocity (Rv) | –17.4 km/s |
Proper motion (μ) | RA: –1.39 ± 0.55 [1] mas/yr Dec.: 16.11 ± 0.32 [1] mas/yr |
Parallax (π) | 27.32 ± 0.41[1] mas |
Distance | 119 ± 2 ly (36.6 ± 0.5 pc) |
Absolute magnitude (MV) | +3.110 |
Details | |
Mass | 1.4 M☉ |
Radius | 1.84 R☉ |
Luminosity | 4.66 L☉ |
Surface gravity (log g) | 4.17 cgs |
Temperature | 6266 K |
Metallicity | 0.21 ± 0.05 |
Rotation | 9.5 days |
Age | 4.95×109 years |
Other designations | |
Database references | |
SIMBAD | data |
ARICNS | data |
Star
This star is classified as spectral type F7V, meaning the color of the photosphere of this star is yellow-white. It takes 9.5 days for the star to rotate once around its axis. This star is 40% more massive and 84% larger than our Sun. Combining the mass and radius makes the surface gravity only 41% that of our Sun.
Planetary system
On April 15, 2000, the Geneva Extrasolar Planet Search Team announced the discovery of a 3 MJ planet in a 226-day orbit.[2][3] Three years later on June 30, 2003, the same two teams using the same method discovered a 3.5 MJ second planet orbiting about halfway between the distances of Mars and Jupiter (or in the middle of the asteroid belt) in the solar system from the star.
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | >2.88 MJ | 0.81 | 225.62 ± 0.22 | 0.31 ± 0.01 | — | — |
c | >4.04 MJ | 3.60 | 2102 ± 264 | 0.33 ± 0.02 | — | — |
See also
- HD 69830
- List of extrasolar planets
References
- van Leeuwen, F. (2007). "HIP 90485". Hipparcos, the New Reduction. Retrieved 2009-12-12.
- "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.
- Naef, D.; et al. (2001). "The CORALIE survey for southern extrasolar planets V. 3 new extrasolar planets". Astronomy and Astrophysics. 375 (1): 205–218. arXiv:astro-ph/0106255. Bibcode:2001A&A...375..205N. doi:10.1051/0004-6361:20010841.
- Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250.
- Raghavan; Henry, Todd J.; Mason, Brian D.; Subasavage, John P.; Jao, Wei‐Chun; Beaulieu, Thom D.; Hambly, Nigel C. (2006). "Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal. 646 (1): 523–542. arXiv:astro-ph/0603836. Bibcode:2006ApJ...646..523R. doi:10.1086/504823.
External links
- "Notes for star HD 169830". The Extrasolar Planets Encyclopaedia. Retrieved 2006-04-14.
- Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona