HD 89744 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 89744 | |
| Constellation | Ursa Major | |
| Right ascension | (α) | 10h 11m 10.5621s |
| Declination | (δ) | +41° 13′ 46.308″ |
| Distance | 130 ly (40 pc) | |
| Spectral type | F7V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.934 ± 0.054 AU |
| Periastron | (q) | 0.302 AU |
| Apastron | (Q) | 1.566 AU |
| Eccentricity | (e) | 0.6770 ± 0.0072 |
| Orbital period | (P) | 256.80 ± 0.13 d (0.70307 y) |
| Orbital speed | (υ) | 39.7 km/s |
| Argument of periastron |
(ω) | 194.4 ± 1.2° |
| Time of periastron | (T0) | 2,451,505.33 ± 0.39 JD |
| Semi-amplitude | (K) | 267.3 ± 5.0 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 8.58 ± 0.71 MJ (2730 M⊕) |
| Discovery information | ||
| Discovery date | April 22, 2000 | |
| Discoverer(s) | Korzennik et al. | |
| Discovery method | Doppler Spectroscopy (Echelle) | |
| Discovery site | Whipple Observatory | |
| Discovery status | Confirmed | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 89744 b is an eccentric Jupiter extrasolar planet orbiting the star HD 89744.[2]
In a simulation of a 10 million year span, this planet swept away all test particles "except for a narrow region near the 8:3 resonance". There can be no planets in this star's habitable zone. Observation has ruled out any planet over 0.7 Jupiter mass within a year period.[3]
References
- ↑ 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.
- ↑ Korzennik, Sylvain G.; et al. (2000). "A High-Eccentricity Low-Mass Companion to HD 89744". The Astrophysical Journal Letters 533 (2): L147–L150. arXiv:astro-ph/0003045. Bibcode:2000ApJ...533L.147K. doi:10.1086/312611.
- ↑ Wittenmyer; Endl, Michael; Cochran, William D.; Levison, Harold F. (2007). "Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems". The Astronomical Journal 134 (3): 1276–1284. arXiv:0706.1962. Bibcode:2007AJ....134.1276W. doi:10.1086/520880.
External links
- "HD 89744". Exoplanets.
Coordinates: 
10h 11m 10.5621s, +41° 13′ 46.308″
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