HD 131664
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Apus |
| Right ascension | 15h 00m 06.0762s |
| Declination | –73° 32′ 07.213″ |
| Apparent magnitude (V) | 8.13 |
| Distance | 180.8 ± 7.5 ly (55.43 ± 2.3 pc) |
| Spectral type | G3V |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia |
data |
HD 131664 is an 8th magnitude G-type main sequence star located approximately 181 light-years away in the constellation of Apus.
On October 26, 2008, a brown dwarf was discovered along with five other planets (BD-17°63 b, HD 145377 b, HD 153950 b, HD 73267 b, and HD 20868 b). This brown dwarf has mass of at least 18.15 times that of Jupiter and orbits in a long-period, eccentric orbit.[1] Follow-up studies with the Hipparcos satellite adjusted the predicted mass of the companion to 23 times that of Jupiter (minimum of 18 and maximum of 49 Jovian masses).[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥18.15 ± 0.35 MJ | 3.17 ± 0.03 | 1951 ± 41 | 0.638 ± 0.02 | — | — |
See also
References
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