| Discovery | |
|---|---|
| Discovered by | Butler et al. |
| Discovery site | California, USA |
| Discovery date | March 12, 2006 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 4.637±0.067AU | |
| Eccentricity | 0.047±0.020[1] |
| 3490±25[1]d | |
| 2456670±240[1] | |
| 67±24[1] | |
| Semi-amplitude | 51.8±1.6[1] |
| Star | HD 24040 |
HD 24040 b is a long-periodexoplanet taking approximately 3500 days to orbit at 4.6astronomical units in an almost circular orbit. It has aminimum mass 4 times that ofJupiter.[1]
HD 24040b was discovered in 2006 based on observations made at theW. M. Keck Observatory inHawaii. However, because the observations covered less than one complete orbit there were only weak constraints on the period and mass.[2] The first reliable orbit for HD 24040b was obtained by astronomers atHaute-Provence Observatory in 2012 who combined the keck measurements with ones from theSOPHIE andELODIE spectrographs.[3] The most recent orbit published in 2015 added additional keck measurements and refined the orbital parameters.[1]
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