HD 169830 planetary system
HD 169830 is a yellow-white main-sequence star of spectral type F8 V approximately 123 light-years from Earth (37.60 parsecs). It hosts 2 confirmed exoplanets.
Host star
- Name
- HD 169830
- Spectral type
- F8 V
- Effective temperature
- 6,300 K
- Mass
- 1.17 M☉ (solar masses)
- Radius
- 1.94 R☉ (solar radii)
- Distance
- 37.60 pc (123 ly)
- Hipparcos catalog
- HIP 90485
Confirmed planets (2)
| Planet | Class | Mass (M⊕) | Radius (R⊕) | Period (d) | Distance (AU) | Eq. temp (K) | Discovered |
|---|---|---|---|---|---|---|---|
| HD 169830 b | Neptune-like | 804.42 | 13.20 | 225.67 | 0.7650 | 345 | 2000 |
| HD 169830 c | Neptune-like | 2437.43 | 12.60 | 1818.82 | 3.0750 | — | 2003 |
The planets in detail
HD 169830 b is a Neptune-like world with about 13.20 Earth radii and 804.42 Earth masses. It orbits HD 169830 at 0.7650 AU with a 226-day year, and a temperate equilibrium temperature of 345 K. Its orbit is notably eccentric (e = 0.29), meaning the distance to its star — and the irradiation it receives — varies substantially over each year. It was confirmed in 2000 via radial velocity (Doppler) measurements.
HD 169830 c is a Neptune-like world with about 12.60 Earth radii and 2437.43 Earth masses. It orbits HD 169830 at 3.0750 AU with a 5.0-Earth-year orbit, and no published equilibrium temperature. Its orbit is notably eccentric (e = 0.25), meaning the distance to its star — and the irradiation it receives — varies substantially over each year. It was confirmed in 2003 via radial velocity (Doppler) measurements.
Discovery
The HD 169830 system was first identified in 2000, with confirmation work continuing through 2003 using radial velocity (Doppler) measurements. Detection facilities: La Silla Observatory.
Observing from Earth
Exoplanets cannot be resolved visually with amateur telescopes — the host star's glare is overwhelming and even space-based direct imaging requires sophisticated coronagraphs. What you can observe is the host star itself at right ascension 276.9562°, declination -29.8168°. Use the 3D orrery above to inspect orbital geometry, planetary scale, and the habitable-zone overlay — the orbits are computed from the published Keplerian elements and animate at user-controlled time rates.
