HD 20003
| Observation data J2000.0
| |
|---|---|
| Constellation | Hydrus
|
| Right ascension | 03h 07m 37.91875s[1] |
| Declination | −72° 19′ 18.8010″[1] |
| Apparent magnitude (V) | 8.39[2] |
| Characteristics | |
| Spectral type | G8 V[3] |
| B−V color index | 0.771±0.015[2] |
| Absolute magnitude (MV) | 5.18[2] |
| Details | |
Gyr | |
| Database references | |
Exoplanet Archive | data |
HD 20003 is a
light years from the Sun based on parallax. HD 20003 is drifting closer with a radial velocity of −16 km/s,[1] and is predicted to come to within 97 light-years in around 1.4 million years from now.[2]
This object is an ordinary,
The survey in 2015 have ruled out the existence of any stellar companions at projected distances above 18 astronomical units.[8]
Planetary system
HD 20003 has two planets that are at least 12 and 13.4 times as massive as the Earth and have orbital periods of just under 12 and 34 days, respectively. These were detected by the HARPS survey in 2011,[9] and the findings were confirmed using Spitzer in 2017.[7]
Since 2017, a third planet HD 20003 d on roughly half-year orbit is suspected.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.0378±0.0031 MJ | 0.0974±0.0016 | 11.849±0.0028 | 0.4±0.08 | — | — |
| c | ≥0.0422±0.004 MJ | 0.1961±0.0032 | 33.823±0.0654 | 0.16±0.09 | — | — |
References
- ^ .
- ^ S2CID 119257644.
- ^ Bibcode:1978mcts.book.....H.
- ^ S2CID 119107228, A76.
- ^
- ^ "HD 20003". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2011-12-20.
- ^ S2CID 86862862, A117.
- hdl:1887/49340. Retrieved 19 June 2020.
- ^ arXiv:1109.2497 [astro-ph.EP].
| Stars |
| ||||||||
|---|---|---|---|---|---|---|---|---|---|
| |||||||||
| |||||||||
| Galaxies |
| ||||||||
