HD 66428 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 66428 | |
| Constellation | Monoceros | |
| Right ascension | (α) | 08h 03m 28.6652s |
| Declination | (δ) | –01° 09′ 45.752″ |
| Distance | 179 ± 12.4 ly (55 ± 3.8 pc) | |
| Spectral type | G5 | |
| Orbital elements | ||
| Semi-major axis | (a) | 3.18 ± 0.19 AU (476 Gm) |
| Periastron | (q) | 1.70 AU (254 Gm) |
| Apastron | (Q) | 4.66 AU (697 Gm) |
| Eccentricity | (e) | 0.465 ± 0.03 |
| Orbital period | (P) | 1973 ± 31 d (5.402 y) |
| Orbital speed | (υ) | 17.6 km/s |
| Argument of periastron |
(ω) | 152.9 ± 3.9° |
| Time of periastron | (T0) | 2,412,139 ± 16 JD |
| Semi-amplitude | (K) | 48.3 ± 2.7 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 2.82 MJ |
| Discovery information | ||
| Discovery date | July 15, 2006 | |
| Discoverer(s) | Butler et al.[1] | |
| Discovery method | Radial velocity | |
| Discovery site |  California | |
| Discovery status | Published[1] | |
HD 66428 b is a long-period jovian exoplanet located approximately 179.3 light-years away in the constellation of Monoceros. It has a mass of >2.82 MJ and takes 1973 days or 5.402 years to orbit around its solar-type star HD 66428. The average distance is 3.18 AU, about half the distance between Mars and Jupiter. This planet is a so-called eccentric Jupiter with an orbital eccentricity of 0.465. At periastron, the distance is 1.70 AU and at apastron, the distance is 4.66 AU.[1]
See also
References
- 1 2 3 Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links
- "Notes for planet HD 66428 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-20.
- "HD 66428". Exoplanets. Retrieved 2008-08-20.
Coordinates: 
08h 03m 28.6652s, −01° 09′ 45.752″
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