J/AJ/164/178ivo://CDS.VizieR/J/AJ/164/178doi:10.26093/cds/vizier.51640178CDSPearson K.A.Beichman C.Fulton B.J.Esposito T.M.Zellem R.T.,Ciardi D.R.Rolfness J.Engelke J.Fatahi T.Zimmerman-Brachman R.,Avsar A.Bhalerao V.Boyce P.Bretton M.Burnett A.D.Burt J.,Cynamon C.H.Fowler M.Gallego D.Gomez E.Guillet B.Hilburn J.,Jongen Y.Kataria T.Kokori A.Kumar H.Kuossari P.Lekkas G.,Marchini A.Meneghelli N.Ngeow C.-C.Primm M.Samantaray S.,Shimizu M.Silvis G.Sienkiewicz F.Swain V.Tan J.Tock K.Wagner K.,Wunsche A.2023-01-16T09:02:22Z2022-12-09T07:28:24ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frexoplanetshigh-velocity-starsvisible-astronomyspectroscopyradial-velocityThe transiting planet HD80606b undergoes a 1000 fold increase in insolation during its 111days orbit due to it being highly eccentric (e=0.93). The planet's effective temperature increases from 400 to over 1400K in a few hours as it makes a rapid passage to within 0.03au of its host star during periapsis. Spectroscopic observations during the eclipse (which is conveniently oriented a few hours before periapsis) of HD80606b with the James Webb Space Telescope (JWST) are poised to exploit this highly variable environment to study a wide variety of atmospheric properties, including composition, chemical and dynamical timescales, and large scale atmospheric motions. Critical to planning and interpreting these observations is an accurate knowledge of the planet's orbit. We report on observations of two full-transit events: 2020 February 7 as observed by the TESS spacecraft and 2021 December 7-8 as observed with a worldwide network of small telescopes. We also report new radial velocity observations which, when analyzed with a coupled model to the transits, greatly improves the planet's orbital ephemeris. Our new orbit solution reduces the uncertainty in the transit and eclipse timing of the JWST era from tens of minutes to a few minutes. When combined with the planned JWST observations, this new precision may be adequate to look for non-Keplerian effects in the orbit of HD80606b.2022AJ....164..178Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/178CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/375/L27 : HD 80606b, planet on an extremely elongated orbit (Naef+ 2001)J/A+A/498/L5 : Photometry and spectroscopy of HD 80606b (Moutou+, 2009)J/A+A/502/695 : Observations of HD 80606 planetary system (Pont+, 2009)J/ApJS/182/97 : Radial velocities of multi-planet systems (Wittenmyer+, 2009)J/A+A/516/A95 : Photometry and spectroscopy of HD 80606b (Hebrard+, 2010)J/ApJ/722/880 : Observations of two transits of HD 80606b (Shporer+, 2010)J/A+A/602/A107 : 231 transiting planets eccentricity and mass (Bonomo+, 2017)J/AJ/153/136 : Planets & host stars with Gaia parallaxes (Stassun+, 2017)J/AJ/158/243 : A search for multiplanet systems with TESS (Pearson, 2019)J/AJ/157/21 : Ground-based spectroscopy of exoplanet XO-2b (Pearson+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/178https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/178http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/178https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/164/178https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/164/178http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/164/178GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/164/178/table6Raw archival radial velocity observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintInstInstrument identifier; APF, ELODIE, HIRES, HRS or SOPHIEmeta.id;instrcharBJD[2451508/2459545] Barycentric Julian Date; TBDdtime.epochdoubleRVel[-341/4457] Relative radial velocitym/sspect.dopplerVeloc;arith.ratiofloate_RVel[0.8/21] Uncertainty in RVelm/sstat.error;spect.dopplerVelocfloat