HD 128311 b
| Discovery | |
|---|---|
| Discovered by | Butler et al. |
| Discovery site |  California, United States |
| Discovery date | 2002 |
| Doppler Spectroscopy | |
| Orbital characteristics[1] | |
| Apastron | 1.412 AU (211,200,000 km) |
| Periastron | 0.756 AU (113,100,000 km) |
| 1.084 ± 0.006 AU (162,160,000 ± 900,000 km) | |
| Eccentricity | 0.303±0.011 |
| 453.019 ± 0.404 d (1.24030 ± 0.00111 a) | |
Average orbital speed | 26.2 |
| Inclination | >30 |
| 2450198.691±4.472 | |
| 57.864±3.258 | |
| Semi-amplitude | 55.627±0.456 |
| Star | HD 128311 |
| Physical characteristics[1] | |
| Mass | ≥1.769±0.023 MJ |
HD 128311 b is an exoplanet[2] located approximately 54 light-years away in the constellation of Boötes. This planet orbits in an eccentric orbit about 1.084 AU from its star (HD 128311). The planet has a minimum mass of 1.769 Jupiter masses.[3][1]
References
[edit]- ^ a b c McArthur, Barbara E.; et al. (2014). "Astrometry, Radial Velocity, and Photometry: The HD 128311 System Remixed with Data from HST, HET, and APT". The Astrophysical Journal. 795 (1): 41. Bibcode:2014ApJ...795...41M. doi:10.1088/0004-637X/795/1/41. S2CID 122980723.
- ^ Butler, R. Paul; et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal. 582 (1): 455–466. Bibcode:2003ApJ...582..455B. CiteSeerX 10.1.1.7.6988. doi:10.1086/344570. S2CID 17608922.
- ^ Vogt, Steven S.; et al. (2005). "Five New Multicomponent Planetary Systems" (PDF). The Astrophysical Journal. 632 (1): 638–658. Bibcode:2005ApJ...632..638V. doi:10.1086/432901. S2CID 16509245.
External links
[edit]- "Notes for planet HD 128311 b". Extrasolar Planets Encyclopaedia. Retrieved 2008-08-18.
- "HD 128311". Exoplanets. Archived from the original on 2008-05-14. Retrieved 2008-08-18.
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