HD 191760
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 20h 13m 26.74880s [1] |
| Declination | −46° 12′ 03.6961″ [1] |
| Spectral type | G3IV/V[2] |
| Other designations | |
HIP 99661 | |
HD 191760 is a star system in the constellation Telescopium. It is a yellow subgiant—a star that is cooling and expanding off the main sequence—of spectral type G3IV/V. Estimated to be just over four billion years old, it is slightly (1.1 to 1.3 times) as massive as the Sun, and is 2.69 times as luminous and has around 1.62 times its radius. Using the ESO-HARPS instrument, it was found to have a brown dwarf around 38 times as massive as Jupiter orbiting at an average distance of 1.35 AU in a period of 505 days. This is an unusual distance from the star and has been termed the 'brown dwarf desert'.[2]
References
- 1 2 "HD 191760". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 4 July 2014.
- 1 2 Jenkins, J.S.; Jones, H.R.A.; Goździewski, K.; Migaszewski, C.; Barnes, J.R.; Jones, M.I.; Rojo, P.; Pinfield, D.J.; Day-Jones, A.C.; Hoyer, S. "First Results From the Calan–Hertfordshire Extrasolar Planet Search: Exoplanets and the Discovery of an Eccentric Brown Dwarf in the Desert". Monthly Notices of the Royal Astronomical Society. 398 (2): 911–17. arXiv:0905.2985
. Bibcode:2009MNRAS.398..911J. doi:10.1111/j.1365-2966.2009.15097.x.
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