HD 104985 b, also named Meztli /ˈmɛstli/, is an extrasolar planet approximately 97 parsecs (317 lys) from the Sun. The 198-day period planet orbits the yellow giant star HD 104985 (Tonatiuh) at a distance of 0.78 AU. With a mass 61/3 times Jupiter it is a gas giant.[1][2]
| Discovery | |
|---|---|
| Discovered by | Sato et al.[1] |
| Discovery site | Okayama Planet Search Program  Japan |
| Discovery date | June 26, 2003 |
| radial velocity | |
| Orbital characteristics | |
| Apastron | 0.80 AU (120,000,000 km) |
| Periastron | 0.76 AU (114,000,000 km) |
| 0.78 AU (117,000,000 km) | |
| Eccentricity | 0.03 ± 0.02 |
| 198.2 ± 0.3 d 0.5426 ± 0.0008 y | |
Average orbital speed | 43 |
| 2451990 ± 20 | |
| 310 ± 30 | |
| Semi-amplitude | 161 ± 2 |
| Star | HD 104985 |
Following its discovery in 2003[1] the planet was designated HD 104985 b. In July 2014 the International Astronomical Union launched NameExoWorlds, a process for giving proper names to certain exoplanets and their host stars.[3] The process involved public nomination and voting for the new names.[4] In December 2015, the IAU announced the winning name was Meztli for this planet.[5] The winning name was submitted by the Sociedad Astronomica Urania of Morelos, Mexico. 'Meztli' was the Aztec goddess of the Moon.[6]
References
edit- ^ a b c Sato, Bun'ei; et al. (2003). "A Planetary Companion to the G-Type Giant Star HD 104985". The Astrophysical Journal Letters. 597 (2): L157–L160. Bibcode:2003ApJ...597L.157S. doi:10.1086/379967.
- ^ Sato, Bun'ei; et al. (2008). "Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, ξ Aquilae and HD 81688". Publications of the Astronomical Society of Japan. 60 (3): 539–550. arXiv:0802.2590. Bibcode:2008PASJ...60..539S. doi:10.1093/pasj/60.3.539.
- ^ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014
- ^ "NameExoWorlds The Process". Archived from the original on 2015-08-15. Retrieved 2015-09-05.
- ^ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
- ^ "NameExoWorlds The Approved Names". Archived from the original on 2018-02-01. Retrieved 2015-12-31.
External links
edit- "HD". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-04.
- Orbit simulation
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