The HR 8799 system contains 4 exoplanets. It is located 134.52 light years away from the solar system.
| Mass | 1.5 solar masses |
| Radius | 1.49 solar radiae |
| Temperature | 7204.58 kelvin |
| Stellar Metallicity | -0.47 decimal exponent |
| Age | 0.06 billion years |
At more than 50 Earth masses, HR 8799 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 2000.000 Earth masses |
| Density | 5.000 grams per cubic centimeter |
| Radius | 13.000 Earth radiae |
| Semi-major Axis | 68 AU |
| Eccentricity | NaN |
| Orbital Period | 170000.000 days |
| Discovery Method | Imaging |
| Discovery Facility | Gemini Observatory |
| Discovery Telescope | 8.19 m Gemini North Telescope |
| Discovery Instrument | NIRI Camera |
| Discovery Date | 2008-11 |
| Reference | Marois et al. 2008 |
At more than 50 Earth masses, HR 8799 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 3000.000 Earth masses |
| Density | 7.500 grams per cubic centimeter |
| Radius | 13.000 Earth radiae |
| Semi-major Axis | 38 AU |
| Eccentricity | 0.5 |
| Orbital Period | 69000.000 days |
| Discovery Method | Imaging |
| Discovery Facility | Gemini Observatory |
| Discovery Telescope | 8.19 m Gemini North Telescope |
| Discovery Instrument | NIRI Camera |
| Discovery Date | 2008-11 |
| Reference | Marois et al. 2008 |
At more than 50 Earth masses, HR 8799 d is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 3000.000 Earth masses |
| Density | 7.500 grams per cubic centimeter |
| Radius | 13.000 Earth radiae |
| Semi-major Axis | 24 AU |
| Eccentricity | 0.6 |
| Orbital Period | 37000.000 days |
| Discovery Method | Imaging |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck II Telescope |
| Discovery Instrument | NIRC2 Camera |
| Discovery Date | 2008-11 |
| Reference | Marois et al. 2008 |
At more than 50 Earth masses, HR 8799 e is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 3178.300 Earth masses |
| Density | 7.740 grams per cubic centimeter |
| Radius | 13.115 Earth radiae |
| Semi-major Axis | 16.4 AU |
| Eccentricity | 0.15 |
| Orbital Period | 20815.600 days |
| Discovery Method | Imaging |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck II Telescope |
| Discovery Instrument | NIRC2 Camera |
| Discovery Date | 2010-12 |
| Reference | Marois et al. 2010 |