WASP-19
{{Short description|Star in the constellation Vela}}
{{Starbox begin
| name = WASP-19 / Wattle
}}
{{Starbox observe
| epoch = J2000.0
| constell = Vela
| dec = {{DEC|−45|39|33.0572}}
}}
{{Starbox character
| appmag_1_passband = B
| appmag_2_passband = R
| appmag_3_passband = I
| appmag_4_passband = J
| appmag_5_passband = H
| appmag_6_passband = K
| b-v = 1.3{{cn|date=June 2025}}
| v-r = 0.1{{cn|date=June 2025}}
| r-i = 0.82{{cn|date=June 2025}}
| variable = planetary transit
}}
{{Starbox astrometry
| radial_v = {{val|21.41|0.95}}
| prop_mo_ra = {{val|−35.457}}
| prop_mo_dec = {{val|17.378}}
| parallax = 3.7516
| p_error = 0.0090
| absmag_v = 5.3{{cn|date=June 2025}}
}}
{{Starbox detail
| mass = {{val|0.965|0.091|0.095}}
| radius = {{val|1.006|0.031|0.034}}
| luminosity = {{val|0.905|0.071|0.069}}
| gravity = {{val|4.417|0.020|0.021}}
| temperature = {{val|5616|66|65}}
| metal_fe = {{val|0.04|0.25|0.30}}
| rotation = 11.76{{±|0.09}} d
| rotational_velocity = 4.0 ± 1.0
| age_gyr = {{val|6.4|4.1|3.5}}
}}
{{Starbox catalog
| names = {{odlist | name=Wattle | GSC=08181-01711 | 2MASS=J09534008-4539330 | TIC=35516889 | TOI=655 | WASP=19}}, USNO-B1.0 0443-00193111
}}
{{Starbox reference
| Simbad = WASP-19
| NSTED = WASP-19
}}
{{Starbox end}}
WASP-19, formally named Wattle, is a magnitude 12.3 star about {{convert|869|ly|pc|lk=on|abbr=off}} away, located in the Vela constellation of the southern hemisphere. 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.
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.{{cite web |url=https://www.nameexoworlds.iau.org/2022exoworlds |title=List of ExoWorlds 2022 |date=8 August 2022 |website=nameexoworlds.iau.org |publisher=IAU |access-date=27 August 2022}} The approved names were proposed by a team from Brandon Park Primary School in Wheelers Hill (Melbourne, Australia), led by scientist Lance Kelly and teacher David Maierhofer {{Cite web|url=https://www.facebook.com/pages/DrBradTucker/100063510852713|title=Facebook|website=www.facebook.com}} 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.
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.
{{OrbitboxPlanet begin
}}
{{OrbitboxPlanet
| exoplanet = b / Banksia
| mass = {{val|1.154|0.078|0.080}}
| period = {{val|0.78883852|(82)}}
| semimajor = {{val|0.01652|0.00050|0.00056}}
| eccentricity = {{val|0.0126|0.014|0.0089}}
| inclination = {{val|79.08|0.34|0.37}}
| radius = {{val|1.415|0.044|0.048}}
}}
{{Orbitbox end}}
References
{{reflist|refs=
{{cite simbad |title=WASP-19}}
{{Cite Gaia DR3|5411736896952029568}}
{{Cite constellation|WASP-19}}
{{cite journal |last1=Cortés-Zuleta |first1=Pía |last2=Rojo |first2=Patricio |display-authors=etal |date=April 2020 |title=TraMoS. V. Updated ephemeris and multi-epoch monitoring of the hot Jupiters WASP-18Ab, WASP-19b, and WASP-77Ab |journal=Astronomy & Astrophysics |volume=636 |issue= |pages=A98 |doi=10.1051/0004-6361/201936279 |arxiv=2001.11112 |bibcode=2020A&A...636A..98C|s2cid=241596186 }}
{{cite web |url=https://www.nameexoworlds.iau.org/2022approved-names |title=2022 Approved Names |website=nameexoworlds.iau.org |publisher=IAU |access-date=7 June 2023}}
}}
Further reading
- {{cite journal | title=Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry | last1=Mancini | first1=L. | last2=Ciceri | first2=S. | last3=Chen | first3=G. | last4=Tregloan-Reed | first4=J. | last5=Fortney | first5=J. J. | last6=Southworth | first6=J. | last7=Tan | first7=T. G. | last8=Burgdorf | first8=M. | last9=Calchi Novati | first9=S. | last10=Dominik | first10=M. | last11=Fang | first11=X.-S. | last12=Finet | first12=F. | last13=Gerner | first13=T. | last14=Hardis | first14=S. | last15=Hinse | first15=T. C. | last16=Jørgensen | first16=U. G. | last17=Liebig | first17=C. | last18=Nikolov | first18=N. | last19=Ricci | first19=D. | last20=Schäfer | first20=S. | last21=Schönebeck | first21=F. | last22=Skottfelt | first22=J. | last23=Wertz | first23=O. | last24=Alsubai | first24=K. A. | last25=Bozza | first25=V. | last26=Browne | first26=P. | last27=Dodds | first27=P. | last28=Gu | first28=S.-H. | last29=Harpsøe | first29=K. | last30=Henning | first30=Th. | last31=Hundertmark | first31=M. | last32=Jessen-Hansen | first32=J. | last33=Kains | first33=N. | last34=Kerins | first34=E. | last35=Kjeldsen | first35=H. | last36=Lund | first36=M. N. | last37=Lundkvist | first37=M. | last38=Madhusudhan | first38=N. | last39=Mathiasen | first39=M. | last40=Penny | first40=M. T. | last41=Prof | first41=S. | last42=Rahvar | first42=S. | last43=Sahu | first43=K. | last44=Scarpetta | first44=G. | last45=Snodgrass | first45=C. | last46=Surdej | first46=J. | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society | volume=436 | issue=1 | pages=2–18 | date=2013 | arxiv=1306.6384 | bibcode=2013MNRAS.436....2M | doi=10.1093/mnras/stt1394 | doi-access=free | s2cid=55455709 }}
{{Sky|09|53|40.07|-|45|39|33.06|815}}
{{Stars of Vela}}
{{DEFAULTSORT:WASP-19}}
Category:G-type main-sequence stars
Category:Planetary systems with one confirmed planet