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.
Discovery[1] | |
---|---|
Discovered by | Minniti et al. |
Discovery date | October 29, 2008 |
Doppler spectroscopy | |
Orbital characteristics[2] | |
1.994±0.018 AU | |
Eccentricity | 0.1938+0.0047 −0.0046 |
1042.4±1.1 d 2.8538+0.0031 −0.003 yr | |
Inclination | 55°+22° −15° or 125°+15° −22° |
33°+128° −21° | |
2455761.5±4.1 | |
240.4°+1.4° −1.5° | |
Semi-amplitude | 72.1±1.0[3] |
Star | HD 143361 |
Physical characteristics[2] | |
Mass | 4.35+1.2 −0.66 MJ |
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.[2]