HD 169830
Coordinates: 
18h 27m 49.4838s, −29° 49′ 00.715″
18h 27m 49.4838s, −29° 49′ 00.715″| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 27m 49.48500s[1] |
| Declination | –29° 49′ 00.7008″[1] |
| Apparent magnitude (V) | +5.90[2] |
| Characteristics | |
| Spectral type | F7V[3] |
| B−V color index | 0.517±0.004[2] |
| Variable type | “None” |
| Absolute magnitude (MV) | +3.08[2] |
| Details Gyr | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
HD 169830 is a
light years from the Sun based on parallax. It is drifting closer with a radial velocity of −17.3 km/s,[4] and is predicted to come as close as 20.7 ly (6.4 pc) in 2.08 million years.[10] HD 169830 is known to be orbited by two large Jupiter-like exoplanets
.
This is an
projected rotational velocity of 3.83 km/s.[5] This star is 40% more massive and 84% larger than the Sun. Combining the mass and radius makes the surface gravity only 41% that of the Sun. It is radiating 4.6[6] times the luminosity of the Sun from its photosphere at an effective temperature of 6,300 K.[6]
A candidate stellar companion, designated component B, lies at an
″ along a position angle of 265°.[11]
Planetary system
On April 15, 2000, the
Geneva Extrasolar Planet Search Team announced the discovery of a minimum mass 3 MJ planet in a 226-day orbit.[12][6] Three years later on June 30, 2003, the same team, using the same method, discovered a minimum mass 3.5 MJ second planet orbiting the star.[7] In 2022, the inclination and true mass of HD 169830 c were measured via astrometry.[13]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.956+0.070 −0.069 MJ |
0.8130+0.0083 −0.0084 |
225.789+0.074 −0.081 |
0.306+0.012 −0.013 |
— | — |
| c | 7.669+1.937 −2.755 MJ |
3.075+0.132 −0.146 |
1818.8+5.7 −6.4 |
0.246+0.022 −0.018 |
24.469+12.739 −7.205° |
— |
See also
- HD 69830
- List of extrasolar planets
References
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ S2CID 119257644.
- ^ S2CID 119476992.
- ^ S2CID 52952408.
- ^ doi:10.1086/428383.
- ^ S2CID 16606841.
- ^ S2CID 5233877.
- ^ S2CID 11616693.
- ^ "HD 169830". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-16.
- S2CID 56269929.
- S2CID 5669768.
- ^ "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.
- ^ S2CID 251864022.
- ^ "HD 169830". NASA Exoplanet Archive. Retrieved 2 September 2022.
External links
- "Notes for star HD 169830". Extrasolar Planets Encyclopaedia. Archived from the original on June 2, 2006. Retrieved 2006-04-14.
- Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona
