Astronomy:HD 143361 b
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Short description: Extrasolar planet in the constellation Norma
| Discovery[1] | |
|---|---|
| Discovered by | Minniti et al. |
| Discovery date | October 29, 2008 |
| Doppler spectroscopy | |
| Orbital characteristics[3] | |
| 1.994±0.018 astronomical unit|AU | |
| Eccentricity | 0.1938+0.0047 −0.0046 |
| Orbital period | 1042.4±1.1 d 2.8538+0.0031 −0.003 yr |
| Inclination | 55°+22° −15° or 125°+15° −22° |
| Longitude of ascending node | 33°+128° −21° |
| astron|astron|helion}} | 2455761.5±4.1 |
| 240.4°+1.4° −1.5° | |
| Semi-amplitude | 72.1±1.0[2] |
| Star | HD 143361 |
| Physical characteristics[3] | |
| Mass | 4.35+1.2 −0.66 Jupiter mass |
HD 143361 b is an exoplanet located approximately 224 light-years away in the constellation of Norma, orbiting the 9th magnitude G-type main sequence star HD 143361. This planet has a minimum mass of 3.0 times that of Jupiter. Because the inclination was initially unknown, the true mass was not known. This planet orbits at a distance of 2.0 AU with an orbital eccentricity of 0.18.
This object was detected using the radial velocity method during an astronomical survey conducted by the Magellan Planet Search Program using the MIKE echelle spectrograph on the 6.5-m Magellan II (Clay) telescope.[1] In 2023, the inclination and true mass of HD 143361 b were determined via astrometry.[3]
References
- ↑ 1.0 1.1 Minniti, Dante et al. (2009). "Low-Mass Companions for Five Solar-Type Stars From the Magellan Planet Search Program". The Astrophysical Journal 693 (2): 1424–1430. doi:10.1088/0004-637X/693/2/1424. Bibcode: 2009ApJ...693.1424M.
- ↑ Jenkins, J. S. et al. (2017). "New planetary systems from the Calan–Hertfordshire Extrasolar Planet Search". Monthly Notices of the Royal Astronomical Society 466 (1): 443–473. doi:10.1093/mnras/stw2811. Bibcode: 2017MNRAS.466..443J.
- ↑ 3.0 3.1 3.2 Xiao, Guang-Yao et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics 23 (5): 055022. doi:10.1088/1674-4527/accb7e. Bibcode: 2023RAA....23e5022X.
External links
- "HD 143361 b". Exoplanets. http://media4.obspm.fr/exoplanets/base/planete.php?etoile=HD+143361&planete=b.
Coordinates: 
16h 01m 50.3484s, −44° 26′ 04.335″
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