HD 89744
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 10h 22m 10.56268s |
| Declination | +41° 13′ 46.3107″ |
| Apparent magnitude (V) | 5.74 |
| Characteristics | |
| Evolutionary stage | F7IV |
| Astrometry | |
| Distance | 130 ly (40 pc) |
| Absolute magnitude (MV) | 2.83[1] |
| Other designations | |
| Database references | |
| SIMBAD | The star |
| planet b | |
| Exoplanet Archive | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
HD 89744 is an F-type subgiant star about 130 light years away in the constellation of Ursa Major. This star has 1.45 times the mass of the Sun, with a projected rotational velocity of 8.0 km s−1.[1]
In April 2000, a planet was discovered by the radial velocity method.[2] In 2004, stellar companion HD 89744 B (~0.076 solar mass) with a projected separation of 2,456 AU was detected.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >8.58 ± 0.71 MJ | 0.934 ± 0.054 | 256.80 ± 0.13 | 0.6770 ± 0.0072 | — | — |
See also
References
- 1 2 Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics, 361: 614–628, Bibcode:2000A&A...361..614P
- ↑ Korzennik, Sylvain G.; et al. (2000). "A High-Eccentricity Low-Mass Companion to HD 89744". The Astrophysical Journal Letters. 533 (2): L147–L150. Bibcode:2000ApJ...533L.147K. arXiv:astro-ph/0003045
. doi:10.1086/312611. - ↑ Mugrauer, M.; Neuhäuser; Seifahrt; Mazeh; Guenther (2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics. 440 (3): 1051–1060. Bibcode:2005A&A...440.1051M. arXiv:astro-ph/0507101 . doi:10.1051/0004-6361:20042297. Retrieved 2010-01-01.
- ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493 . doi:10.1086/504701.
External links
- Wittenmyer; et al. (2007). "Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems". The Astronomical Journal. 134 (3): 1276–1284. Bibcode:2007AJ....134.1276W. arXiv:0706.1962 . doi:10.1086/520880.
Coordinates: 
10h 11m 10.5621s, +41° 13′ 46.308″
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