J/AJ/170/34ivo://CDS.VizieR/J/AJ/170/34doi:10.26093/cds/vizier/be-5a-12CDSTamburo P.Yee S.W.Garcia-mejia J.Stefansson G.Charbonneau D.,Bieryla A.Howard A.W.Isaacson H.Fulton B.J.Householder A.2026-08-03T07:20:11Z2026-04-17T14:01:17ZCDS support team

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

cds-question@unistra.frexoplanetsinfrared-photometryspectroscopyradial-velocityWe measure the true obliquity of TOI-2364, a K dwarf with a sub-Saturn-mass (M_p_=0.18M_J_) transiting planet on the upper edge of the hot-Neptune desert. We used new Rossiter-McLaughlin observations gathered with the Keck Planet Finder to measure the sky-projected obliquity {lambda}=7{deg}+10{deg}-11{deg}. Combined with a stellar rotation period of 23.47+/-0.29days measured with photometry from the Tierras Observatory, this yields a stellar inclination of 90{deg}+/-13{deg} and a true obliquity {psi}=15:6+7:7-7:3, indicating that the planet's orbit is well aligned with the rotation axis of its host star. The determination of {psi} is important for investigating a potential bimodality in the orbits of short-period sub-Saturns around cool stars, which tend to be either aligned with or perpendicular to their host stars' spin axes.2025AJ....170...34Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/170/34CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/PASP/134/H2001 : Stellar obliquities in exoplanetary syst. (Albrecht+, 2022)J/MNRAS/474/2094 : Inferring probabilistic stellar rot. periods (Angus+, 2018)J/AJ/168/185 : HATS-38b & WASP-139b: LCs & RVs (Espinoza-Retamal+, 2024)J/A+A/690/A379 : Obliquities of exoplanet host stars (Knudstrup+, 2024)J/MNRAS/510/5623 : Study of Kepler's FGKM stars (Masuda+, 2022)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/A+A/557/L10 : Rotation periods of 12000 Kepler stars (Nielsen+, 2013)J/A+A/635/A43 : Stellar rot. periods from K2 Campaigns 0-18 (Reinhold+, 2020)J/ApJ/931/L15 : Obs. of two transits of GJ 3470b with NEID (Stefansson+, 2022)J/AJ/163/253 : The Perkins INfrared Exosatellite Survey. I. (Tamburo+, 2022)J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)J/ApJ/700/302 : Relative photometry of XO-3 (Winn+, 2009)J/ApJS/265/1 : TESS Grand Unified Hot Jupiter Surveys. II. (Yee+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/170/34https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/170/34http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/170/34https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/170/34https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/170/34http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/170/34GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/AJ/170/34/fig3aTESS light curves of TOI-2364recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSectorTESS sector identifier (1)obs.fieldcharBJD[2458471/2460687] Barycentric Julian Date; TDBdtime.epochdoubleNFlux[0.98/1.01] Normalized fluxphot.flux;arith.ratiodoublee_NFlux[6e-4/3e-3] Uncertainty in NFluxstat.error;phot.fluxdoubleJ/AJ/170/34/fig3bKeplerCam light curve of TOI-2364NFlux[0.98/1.02] Normalized fluxphot.flux;arith.ratiodoublee_NFlux[1.1e-3/1.2e-3] Uncertainty in NFluxstat.error;phot.fluxdoubleAir[-0.3/1] Airmassobs.airMassdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[2460239/2460241] Barycentric Julian Date; TDBdtime.epochdoubleJ/AJ/170/34/fig3cKepler Planet Finder radial velocity curve of TOI-2364recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[2460239/2460241] Barycentric Julian Date; TDBdtime.epochdoubleRVel[54.7/54.8] Radial velocitym/sspect.dopplerVelocfloate_RVel[1.8e-3/2.2e-3] Uncertainty in RVelm/sstat.error;spect.dopplerVelocfloat