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
- 1 2 Moutou, C.; et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950". Astronomy and Astrophysics. 496 (2): 513–519. arXiv:0810.4662
. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941. - ↑ Reffert, S.; Quirrenbach, A. (2011). "Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs". Astronomy & Astrophysics. 527. id.A140. arXiv:1101.2227. Bibcode:2011A&A...527A.140R. doi:10.1051/0004-6361/201015861.
This article is issued from Wikipedia - version of the 5/27/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.