HD 40307
File:HD 40307 star system.jpg HD 40307 and it's three "super-earths". (Click for larger image) | |
| Observation data Epoch Equinox | |
|---|---|
| Constellation | |
| Right ascension | 05 54 04 |
| Declination | -60 01 24 |
| Astrometry | |
| Distance | 42 ly |
| Other designations | |
HD 40307 is a star located 42 light years away in the direction of the southern Dorado and Pictor constellations. It is slightly smaller than the Sun.
Planetary system
In June, 2008 the European Organisation for Astronomical Research in the Southern Hemisphere (ESO) announced that they had discoverd three "Super-Earths" orbiting the star.[1] All three planets were detected with the HARPS spectrograph system.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.0132 MJ | — | 4.31 | — | — | — |
| c | 0.0216 MJ | — | 9.62 | — | — | — |
| d | 0.0288 MJ | — | 20.45 | — | — | — |
References
External links
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