HD 178911
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 09m 04.3838s |
| Declination | +34° 36′ 01.625″ |
| Apparent magnitude (V) | 6.74 |
| Distance | 160 ly (49.0 pc) |
| Spectral type | G1V |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
HD 178911 is a binary star system in the constellation Lyra. The secondary star (designated as HD 178911 B) has an apparent magnitude of 6.74 and a spectral type of G1V, which is very similar to our Sun at a distance of 160 light years. The age of the star is slightly older and have significantly higher metallicity than our Sun.
Contents |
[edit] Planetary system
In 2001 an extrasolar planet was discovered in orbit around the secondary star.[1]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >7.35 ± 0.60 MJ | 0.345 ± 0.20 | 71.511 ± 0.011 | 0.139 ± 0.014 |
[edit] See also
[edit] References
- ^ Zucker et al.; Naef, D.; Latham, D. W.; Mayor, M.; Mazeh, T.; Beuzit, J. L.; Drukier, G.; Perrier‐bellet, C. et al (2002). "A Planet Candidate in the Stellar Triple System HD 178911". The Astrophysical Journal 568 (1): 363–368. arXiv:astro-ph/0111550. Bibcode 2002ApJ...568..363Z. doi:10.1086/338892. http://www.iop.org/EJ/article/0004-637X/568/1/363/54915.html.
- ^ Butler et al.; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D. 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. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html.
[edit] External links
- "HD 178911 B". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&StarId=141.
Coordinates: 
19h 09m 04.3838s, +34° 36′ 01.625″
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