HD 37124
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 37m 02.49s[1] |
| Declination | +20° 43′ 50.8″[1] |
| Apparent magnitude (V) | 7.68 |
| Characteristics | |
| Spectral type | G4IV-V[2] |
| B−V color index | 0.66 |
| Astrometry | |
| Proper motion (μ) | RA: –80.14 ± 1.05[1] mas/yr Dec.: –419.77 ± 0.65[1] mas/yr |
| Parallax (π) | 29.70 ± 0.70[1] mas |
| Distance | 110 ± 3 ly (33.7 ± 0.8 pc) |
| Details | |
| Mass | 0.85 M☉ |
| Radius | 0.82 R☉ |
| Temperature | 5610 ± 70 K |
| Metallicity | –0.44 Fe/H |
| Age | 3.33 billion years |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 37124 is a yellow dwarf star approximately 110 light-years away in the constellation of Taurus (the Bull). Three extrasolar planets have been found to orbit the star.
Planetary system
As of 2011, three extrasolar planets have been found to orbit the star. Announced in 1999, the first planet (HD 37124 b)[3] was discovered orbiting its parent star around the inner edge of the habitable zone, causing the planet to have a somewhat similar insolation to that of Venus. A second planet became apparent by 2003, thought to orbit in a 1940 days on an eccentric orbit,[4] but this was subsequently found to be unstable.[5] Solving this, a three-planet solution was announced in 2005:[6] this contained a second planet (HD 37124 c) orbiting at the outer edge of the habitable zone with an insolation similar to that of Mars, and a third planet, (HD 37124 d). While not obviously in any orbital resonances in 2005, an updated solution announced in 2011 found planets c and d to likely be in a 2:1 resonance.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.675 ± 0.017 MJ | 0.53364 ± 0.00020 | 154.378 ± 0.089 | 0.054 ± 0.028 | — | — |
| c | ≥0.652 ± 0.052 MJ | 1.7100 ± 0.0065 | 885.5 ± 5.1 | 0.125 ± 0.055 | — | — |
| d | ≥0.696 ± 0.059 MJ | 2.807 ± 0.038 | 1862 ± 38 | 0.16 ± 0.14 | — | — |
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
External links
- Lua error in package.lua at line 80: module 'strict' not found.
- Lua error in package.lua at line 80: module 'strict' not found.
- Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona
