HD 212771 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 212771 | |
| Constellation | Aquarius | |
| Right ascension | (α) | 22h 27m 03s |
| Declination | (δ) | −17° 15′ 49″ |
| Apparent magnitude | (mV) | 7.6 |
| Distance | 427 ± 46 ly (131 ± 14 pc) | |
| Spectral type | G8IV | |
| Mass | (m) | 1.15 ± 0.08 M☉ |
| Radius | (r) | 5 ± 0.1 R☉ |
| Temperature | (T) | 5121 ± 44 K |
| Metallicity | [Fe/H] | -0.21 ± 0.03 |
| Age | 6 ± 2 Gyr | |
| Orbital elements | ||
| Semi-major axis | (a) | 1.22 ± 0.3 AU |
| Eccentricity | (e) | 0.111 ± 0.06 |
| Orbital period | (P) | 373.3 ± 3.4 d |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 2.3 ± .4 MJ |
| Discovery information | ||
| Discovery date | 2010-03-17 | |
| Discoverer(s) | Howard et al. | |
| Discovery method | Doppler spectroscopy | |
| Discovery status | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 212771 b is an extrasolar planet orbiting the G-type star HD 212771 approximately 427 light years away in the constellation Aquarius.[1]
See also
References
- ↑ Johnson, John Asher; et al. (2010). "Retired A Stars and Their Companions IV. Seven Jovian Exoplanets from Keck Observatory". Publications of the Astronomical Society of the Pacific. 122 (892): 701–711. Bibcode:2010PASP..122..701J. arXiv:1003.3445
[astro-ph.EP]. doi:10.1086/653809.
External links
- "HD 212771 b". The Extrasolar Planets Encyclopaedia.
Coordinates: 
22h 27m 03s, −17° 15′ 49″
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