HD 20781
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Fornax[1] |
| Right ascension | 03h 20m 02.943s[2] |
| Declination | –28° 47′ 01.80″[2] |
| Apparent magnitude (V) | 8.44 |
| Characteristics | |
| Spectral type | G9.5V |
| Astrometry | |
| Proper motion (μ) | RA: 348.97 ± 0.71[2] mas/yr Dec.: –67.69 ± 0.91[2] mas/yr |
| Parallax (π) | 28.27 ± 1.08[2] mas |
| Distance | 115 ± 4 ly (35 ± 1 pc) |
| Other designations | |
HD 20781 is a star which is part of a wide binary system with HD 20782. Both stars possess their own planetary systems in S type orbits. This is the first time that planets have been found in both components of a wide binary system.[4][5][6]
Planetary system
HD 20781
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 12.04 ± 1.11 M⊕ | 0.169 ± 0.0028 | 29.15 ± 0.0201 | 0.11 ± 0.06 | — | — |
| c | 15.76 ± 1,20 M⊕ | 0.3456 ± 0.0047 | 85.131 ± 0.1161 | 0.28 ± 0.09 | — | — |
See also
References
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- ↑ 2.0 2.1 2.2 2.3 2.4 Lua error in package.lua at line 80: module 'strict' not found.Vizier catalog entry
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- ↑ http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...462..345DFUL
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