HD 136118 b
|Extrasolar planet||List of extrasolar planets|
|Right ascension||(α)||15h 18m 55.4719s|
|Declination||(δ)||–01° 35′ 32.590″|
|Semimajor axis||(a)||1.45 ± 0.25 AU|
|Eccentricity||(e)||0.352 ± 0.006|
|Orbital period||(P)||1209 ± 24 d
|Inclination||(i)||163.1 ± 3°|
|(ω)||316.4 ± 0.6°|
|Time of periastron||(T0)||2450610.5 ± 3.7 JD|
|Discovery date||February 7, 2002|
|Discoverer(s)||Fischer "et al."|
|Discovery method||Doppler Spectroscopy|
HIP 74948 b
HD 136118 b is a brown dwarf located approximately 171 light-years away in the constellation of Serpens Cauda. This object had a minimum mass of 11.9 times that of Jupiter. Due to its high mass the planet is likely to be very hot and possibly glowing faintly. The lower limit on its mass is only slightly less than the deuterium burning threshold that some astronomers use to distinguish between planets and brown dwarfs. Depending on the inclination of its orbit, the true mass could be above this limit. The orbit of the object is located at the average distance of 1.45 astronomical units from the parent star, taking 40 months to complete one eccentric orbit.
- 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.
- "Notes for planet HD 136118 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-20.
- "HD 136118". Exoplanets. Retrieved 2008-08-20.
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