Rho Indi b

Rho Indi b is an exoplanet that orbits around Rho Indi. Its semimajor axis is 2.54 AU placing just outside the star's habitable zone. The planet takes 3.7 years to orbit the star. It is over twice as massive as Jupiter. Since the inclination of the orbit to the line-of-sight was initially unknown, only a lower bound on the planet's mass could be determined.[1] In 2023, the inclination and true mass of Rho Indi b were determined via astrometry.[2]

Rho Indi b
Discovery[1]
Discovered byJones et al.
Discovery siteAustralia
Discovery dateSept 17, 2002
Doppler Spectroscopy
Designations
HD 216437 b
HIP 113137 b
Orbital characteristics[2]
2.501+0.036
−0.037 AU
Eccentricity0.318±0.028
1336±12 d
3.658±0.034 yr
19.92 km/s
Inclination35.0°+10.0°
−6.1° or 145.0°+6.1°
−10.0°
95.698 mas
117.0°±14.0°
2,455,959+38
−35 JD
64.5°+5.5°
−5.4°
Semi-amplitude39.0±1.0 m/s
StarRho Indi
Physical characteristics[2]
Mass3.88±0.73 MJ

    See also

    References
    1. Jones, Hugh R. A.; Paul Butler, R.; Marcy, Geoffrey W.; Tinney, Chris G.; Penny, Alan J.; McCarthy, Chris; Carter, Brad D. (2002). "Extrasolar planets around HD 196050, HD 216437 and HD 160691". Monthly Notices of the Royal Astronomical Society. 337 (4): 1170–1178. arXiv:astro-ph/0206216. Bibcode:2002MNRAS.337.1170J. doi:10.1046/j.1365-8711.2002.05787.x. S2CID 119520409.
    2. Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
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