HD 23596 b is an exoplanet approximately 170 light years away in the constellation Perseus. The planet is very massive, with a minimum mass 7.8 times that of Jupiter, classifying it as mid-superjovian. Based on its mass, the planet would probably be a gas giant with no solid surface. The planet orbits at the average distance of 2.83 AU, taking 1565 days to complete its orbit with average velocity of 19.7 km/s. The eccentricity of the planet's orbit is higher than all the planets in the Solar System, bringing as close as 2.00 AU to as far as 3.66 AU from the parent star.[2]

HD 23596 b
Discovery
Discovered byPerrier et al.
Discovery siteFrance Haute-Provence Observatory
Discovery dateJune 2002
radial velocity
Orbital characteristics[1]
2.694+0.107
−0.118
 AU
Eccentricity0.282+0.017
−0.014
4.203+0.021
−0.025
 yr
Inclination38.898°+15.759°
−77.179°
16.684°+148.950°
−21.642°
2450036.142+18.541
−15.360
264.570°+3.372°
−3.544°
Semi-amplitude128.315+2.480
−2.670
 m/s
StarHD 23596
Physical characteristics[1]
Mass11.914+0.990
−1.768
 MJ

The planet was discovered by Perrier et al. in 2002 using the radial velocity technique to look for changes in inward (blue-shifting) and outward (red-shifting) radial stellar motion in the sky.[2] In 2022, the inclination and true mass of HD 23596 b were measured via astrometry.[1]

References

edit
  1. ^ a b c Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.
  2. ^ a b Perrier, C.; et al. (2003). "The ELODIE survey for northern extra-solar planets. I. Six new extra-solar planet candidates". Astronomy and Astrophysics. 410 (3): 1039–1049. arXiv:astro-ph/0308281. Bibcode:2003A&A...410.1039P. doi:10.1051/0004-6361:20031340. S2CID 6946291.
edit