HD 136118
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 18m 55.4719s |
| Declination | –01° 35′ 32.590″ |
| Apparent magnitude (V) | +6.94 |
| Distance | 171 ly (52.3 pc) |
| Spectral type | F9V |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 136118 is a F-type main-sequence star located approximately 171 light-years away in the constellation of Serpens Cauda. It is an F-type dwarf and has apparent magnitude +6.94.
Brown dwarf companion
The astronomer Debra Fischer discovered a very massive planet, which was announced on February 7, 2002.[1] On November 25, 2009, the object turned out to be a brown dwarf.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 42+18 −11 MJ |
1.45 ± 0.25 | 1209 ± 24 | 0.352 ± 0.006 | — | — |
See also
References
- ↑ Fischer, Debra A.; et al. (2002). "Planetary Companions to HD 136118, HD 50554, and HD 106252". Publications of the Astronomical Society of the Pacific. 114 (795): 529–535. Bibcode:2002PASP..114..529F. doi:10.1086/341677.
- ↑ Martioli, E.; et al. (2010). "The Mass of the Candidate Exoplanet Companion to HD136118 from Hubble Space Telescope Astrometry and High-Precision Radial Velocities". The Astrophysical Journal. 708 (1): 625–634. arXiv:0911.4645
. Bibcode:2010ApJ...708..625M. doi:10.1088/0004-637X/708/1/625.
External links
- "Notes for star HD 136118". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-20.
Coordinates: 
15h 18m 55.4719s, −01° 35′ 32.590″
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