Astronomy:WASP-19
WASP-19, formally named Wattle,[1] is a magnitude 12.3 star about 869 light-years (266 parsecs) away, located in the Vela constellation of the Southern Hemisphere.[2] This star has been found to host a transiting hot Jupiter-type planet in a tight orbit.
WASP-19 is older than the Sun, has a fraction of heavy elements above the solar abundance, and is rotating rapidly, being spun up by the tides raised by the giant planet on a close orbit.[3]
Nomenclature
The designation WASP-19 indicates that this was the 19th star found to have a planet by the Wide Angle Search for Planets.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project.[4] The approved names were proposed by a team from Brandon Park Primary School in Wheelers Hill (Melbourne, Australia), led by scientist Lance C. Kelly and teacher David Maierhofer[5][6] and announced in June 2023. WASP-19 is named "Wattle" and its planet is named "Banksia", after the plant genera Wattle (specifically the golden wattle Acacia pycnantha) and Banksia (specifically the scarlet banksia Banksia coccinea) respectively.[1]
Planetary system
In December 2009, the SuperWASP project announced that a hot Jupiter type exoplanet, WASP-19b, was orbiting very close to this star and with the shortest orbital period of any transiting exoplanet known at the time.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Banksia | 1.154+0.078 −0.080 MJ |
0.01652+0.00050 −0.00056 |
0.78883852(82) | 0.0126+0.014 −0.0089 |
79.08+0.34 −0.37° |
1.415+0.044 −0.048 RJ |
References
- ↑ 1.0 1.1 "2022 Approved Names". IAU. https://www.nameexoworlds.iau.org/2022approved-names.
- ↑ 2.0 2.1 Hebb, L. et al. (2010). "WASP-19b: The Shortest Period Transiting Exoplanet Yet Discovered". The Astrophysical Journal 708 (1): 224–231. doi:10.1088/0004-637X/708/1/224. Bibcode: 2010ApJ...708..224H.
- ↑ Maxted, P. F. L.; Serenelli, A. M.; Southworth, J. (2015), "A comparison of gyrochronological and isochronal age estimates for transiting exoplanet host stars", Astronomy & Astrophysics 577: A90, doi:10.1051/0004-6361/201525774, Bibcode: 2015A&A...577A..90M
- ↑ "List of ExoWorlds 2022". IAU. 8 August 2022. https://www.nameexoworlds.iau.org/2022exoworlds.
- ↑ "Facebook". https://www.facebook.com/pages/DrBradTucker/100063510852713.
- ↑ https://nameexoworlds.iau.org/2022approved-names?pgid=lieirelz-ee6d54d6-a64c-4708-a2d5-d7ceb7071768,
- ↑ Cortés-Zuleta, Pía et al. (April 2020). "TraMoS. V. Updated ephemeris and multi-epoch monitoring of the hot Jupiters WASP-18Ab, WASP-19b, and WASP-77Ab". Astronomy & Astrophysics 636: A98. doi:10.1051/0004-6361/201936279. Bibcode: 2020A&A...636A..98C.
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Further reading
- Mancini, L. et al. (2013). "Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry". Monthly Notices of the Royal Astronomical Society 436 (1): 2–18. doi:10.1093/mnras/stt1394. Bibcode: 2013MNRAS.436....2M.
Coordinates: 
09h 53m 40.07s, −45° 39′ 33.06″
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