HD 173416 b
Discovery[1] | |
---|---|
Discovered by | Liu et al. |
Discovery date | January 10, 2009 |
radial velocity | |
Designations | |
Wangshu | |
Orbital characteristics[2] | |
Apastron | 1.399 AU (209.3×10 6 km) |
Periastron | 0.917 AU (137.2×10 6 km) |
1.158+0.003 −0.004 AU | |
Eccentricity | 0.208+0.089 −0.094 |
322.03+1.33 −1.52 d | |
2454735.0+23.4 −253.1 JD | |
−117.9°+33.7° −33.1° | |
Semi-amplitude | 35.33+4.07 −4.46 m/s |
Star | HD 173416 |
Physical characteristics[2] | |
Mass | ≥1.841+0.206 −0.225 MJ |
HD 173416 b, also named Wangshu, is an extrasolar planet located approximately 433 light-years away in the constellation of Lyra, orbiting the 6th magnitude G-type giant star HD 173416. This planet is at least 2.7 times the mass of Jupiter and was discovered on January 10, 2009 by Liu et al. HD 173416 b orbits at 1.16 AU from the star. However, despite the fact that the planet orbits 16% further from the star than Earth does from the Sun, it has an orbital period of only 323.6 days, compared to 365.25 days for Earth. This inverse relationship is caused by the parent star having twice the mass of the Sun, which increases the strength of its gravitational field. This evidence implies that when this star was on the main sequence, it was an A-type star.
The planet HD 173416 b is named Wangshu (望舒). The name was selected in the 2019 NameExoWorlds campaign by China, during the 100th anniversary of the IAU. Wangshu is the goddess who drives for the Moon and also represents the Moon in Chinese mythology.[3][4]
References
[edit]- ^ Liu; et al. (10 January 2009). "A Planetary Companion Orbiting to the Intermediate-Mass G Giant HD 173416". Research in Astronomy and Astrophysics. 9 (1): 4. Bibcode:2009RAA.....9....1L. doi:10.1088/1674-4527/9/1/001. S2CID 250679097. Archived from the original (abstract) on 9 August 2017. Retrieved 1 February 2009.
- ^ a b Teng, Huan-Yu; Sato, Bun'ei; et al. (December 2023). "Revisiting planetary systems in the Okayama Planet Search Program: A new long-period planet, RV astrometry joint analysis, and a multiplicity-metallicity trend around evolved stars". Publications of the Astronomical Society of Japan. 75 (6): 1030–1071. arXiv:2308.05343. Bibcode:2023PASJ...75.1030T. doi:10.1093/pasj/psad056.
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ "International Astronomical Union | IAU". www.iau.org. Archived from the original on 2022-12-05. Retrieved 2020-01-02.
External links
[edit]- "HD 173416 b". Exoplanets. Archived from the original on 2012-03-18. Retrieved 2009-02-01.