astro.wikisort.org - Meteorite
HD 173416 b is an extrasolar planet located approximately 440 light years away in the constellation of Lyra, orbiting the 6th magnitude G-type giant star HD 173416. This is planet has 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 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.
| Discovery | |
|---|---|
| Discovered by | Liu et al. |
| Discovery date | January 10, 2009 |
Detection method | radial velocity |
| Orbital characteristics | |
| Apastron | 1.40 AU (209,000,000 km) |
| Periastron | 0.92 AU (138,000,000 km) |
Semi-major axis | 1.16 ± 0.06 AU (173,500,000 ± 9,000,000 km) |
| Eccentricity | 0.21 ± 0.04 |
Orbital period (sidereal) | 323.6 ± 2.2 d 0.8860 ± 0.0060 y |
Average orbital speed | 39.13 |
Time of periastron | 3465.8 ± 8.3 |
Argument of periastron | 254 ± 11 |
| Star | HD 173416 |
The planet HD 173416 b is named Wangshu (望舒). The name was selected in the NameExoWorlds campaign by Nanjing, during the 100th anniversary of the IAU. Wangshu is the goddess who drives for the Moon and also represents the Moon in Chinese mythology.[1][2]
References
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- Liu; et al. (10 January 2009). "A Planetary Companion Orbiting to the Intermediate-Mass G Giant HD 173416" (abstract). Research in Astronomy and Astrophysics. 9 (1): 4. Bibcode:2009RAA.....9....1L. doi:10.1088/1674-4527/9/1/001.
External links
- "HD 173416 b". Exoplanets. Archived from the original on 2012-03-18. Retrieved 2009-02-01.
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На других языках
- [en] HD 173416 b
[es] HD 173416 b
HD 173416 b es un planeta extrasolar situado aproximadamente a 440 años luz de distancia, en la constelación de Lyra, orbitandoi la estrella de tipo G HD 173416. Este gigante gaseoso fue descubierto el 10 de enero de 2009 por Liu et al.. Este planeta orbita a 1,16 UA de su estrella. Sin embargo, a pesar del hecho de que el planeta orbita el 16% más lejos de la estrella que la Tierra del Sol, su período orbital es de sólo 323,6 días, en comparación con los 365,25 días de la Tierra. Esta relación inversa es causada porque la estrella HD 173416 posee el doble de la masa de nuestro sol, lo que aumenta la fuerza de su campo gravitional. Esta evidencia implica que, cuando la estrella estaba en la secuencia principal, fue una estrella de tipo A.[ru] HD 173416 b
HD 173416 b — газовый гигант, вращающийся вокруг звезды HD 173416 спектрального класса G8III . Открыт группой китайских и японских астрономов с помощью метода доплеровской спектроскопии в 2009 году.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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