J/AJ/163/293ivo://CDS.VizieR/J/AJ/163/293doi:10.26093/cds/vizier.51630293CDSTurtelboom E.V.Weiss L.M.Dressing C.D.Nowak G.Palle E.Beard C.,Blunt S.Brinkman C.Chontos A.Claytor Z.R.Dai F.Dalba P.A.,Giacalone S.Gonzales E.Harada C.K.Hill M.L.Holcomb R.Korth J.,Lubin J.Masseron T.MacDougall M.Mayo A.W.Mocnik T.,Akana Murphy J.M.Polanski A.S.Rice M.Rubenzahl R.A.Scarsdale N.,Stassun K.G.Tyler D.B.Van Zandt J.Crossfield I.J.M.Deeg H.J.,Fulton B.Gandolfi D.Howard A.W.Huber D.Isaacson H.Kane S.R.,Lam K.W.F.Luque R.Martin E.L.Morello G.Orell-Miquel J.,Petigura E.A.Robertson P.Roy A.Van Eylen V.Baker D.Belinski A.A.,Bieryla A.Ciardi D.R.Collins K.A.Cutting N.Della-Rose D.J.,Ellingsen T.B.Furlan E.Gan T.Gnilka C.L.Guerra P.Howell S.B.,Jimenez M.Latham D.W.Lariviere M.Lester K.V.Lillo-Box J.Luker L.,Mann C.R.Plavchan P.P.Safonov B.Skinner B.Strakhov I.A.,Wittrock J.M.Caldwell D.A.Essack Z.Jenkins J.M.Quintana E.V.,Ricker G.R.Vanderspek R.Seager S.Winn J.N.2025-05-05T20:07:43Z2022-11-02T09:34:24ZCDS support team

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

cds-question@unistra.frk-starsexoplanetsvisible-astronomyspectroscopyradial-velocityMultiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K-dwarf (V=11.6, K=9.9) and four transiting sub-Neptunes identified by TESS with orbital periods of 4.31, 5.90, 18.66, and 37.92days. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii (2.97{+/-}0.06R{Earth}, 2.47{+/-}0.08R{Earth}, 3.46{+/-}0.09R{Earth}, and 3.72{+/-}0.16R{Earth}) and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets (8.1{+/-}1.1M{Earth}, 8.8{+/-}1.2M{Earth}, 5.3{+/-}1.7M{Earth}, and 14.8{+/-}2.3M{Earth}). The two outer planets, TOI-1246d and TOI-1246e, lie near to the 2:1 resonance (Pe/Pd=2.03) and exhibit transit-timing variations. TOI-1246 is one of the brightest four-planet systems, making it amenable for continued observations. It is one of only five systems with measured masses and radii for all four transiting planets. The planet densities range from 0.70{+/-}0.24 to 3.21{+/-}0.44g/cm^3^, implying a range of bulk and atmospheric compositions. We also report a fifth planet candidate found in the RV data with a minimum mass of 25.6{+/-}3.6M{Earth}. This planet candidate is exterior to TOI-1246e, with a candidate period of 93.8days, and we discuss the implications if it is confirmed to be planetary in nature.2022AJ....163..293Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/293CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)VI/120 : High-resolution synthetic stellar library (Coelho+, 2005)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/ApJ/720/1118 : i-band photometry of HAT-P-16 (Buchhave+, 2010)J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)J/A+A/546/A27 : Radial velocity and photometry for GJ3470 (Bonfils+, 2012)J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)J/MNRAS/426/739 : Velocities for seven transiting hot Jupiters (Hellier+, 2012)J/A+A/546/A10 : Multiplicity transiting planet-host stars (Lillo-Box+, 2012)J/MNRAS/421/2342 : 4 Kepler systems transit timing observation (Steffen+, 2012)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/ApJ/776/67 : Rotational tracks (van Saders+, 2013)J/ApJ/790/146 : Planets in Kepler's multi-transiting systems (Fabrycky+, 2014)J/ApJ/785/15 : Transit times Kepler-79's known planets (Jontof-Hutter+, 2014)J/A+A/566/A103 : Kepler planet host candidates imaging (Lillo-Box+, 2014)J/ApJ/784/45 : Kepler's multiple planet candidates. III. (Rowe+, 2014)J/ApJS/210/25 : Transit timing variation 15 planetary pairs. II. (Xie, 2014)J/ApJ/822/86 : False positive probabilities Q1-Q17 DR24 KOIs (Morton+, 2016)J/AJ/152/180 : Bolometric fluxes eclipsing binaries Tycho-2 (Stassun+, 2016)J/ApJ/825/19 : Mass-radius relationship planets with Rp<4 (Wolfgang+, 2016)J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)J/A+A/608/A35 : K2-18 HARPS time-series (Cloutier+, 2017)J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)J/AJ/153/71 : Kepler follow-up observation program I Imaging (Furlan+, 2017)J/AJ/154/5 : Transit timing variations 145 Kepler planets (Hadden+, 2017)J/AJ/154/107 : California-Kepler Survey. I. 1305 stars (Petigura+, 2017)J/AJ/153/136 : Planets & their host stars with Gaia plxes (Stassun+, 2017)J/A+A/618/A142 : Radial velocity for GJ 1132 (Bonfils+, 2018)J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)J/AJ/155/48 : California-Kepler Survey. V. Masses and radii (Weiss+, 2018)J/AJ/157/242 : Updated study of potential targets for Ariel (Edwards+, 2019)J/ApJ/876/L24 : HARPS radial velocities of host star HD15337 (Gandolfi+, 2019)J/ApJS/250/20 : Rotation periods in TESS objects of interest (Canto+, 2020)J/AJ/159/120 : Transit time of K2-146b and K2-146c with K2 & HPF (Lam+, 2020)J/AJ/159/57 : HST spectroscopic LCs Kepler 51b & 51d (Libby-Roberts+, 2020)J/A+A/640/A48 : K2-32 and K2-233 light and RV curves (Lillo-Box+, 2020)J/A+A/646/A157 : HD 108236 CHEOPS light curves (Bonfanti+, 2021)J/A+A/653/A41 : L 98-59 (TOI-175) ESPRESSO observations (Demangeon+, 2021)J/ApJS/254/39 : Exoplanet candidates from TESS first 2yr obs (Guerrero+, 2021)J/AJ/162/216 : Occurrence rates systems with a Venus-like planet (He+, 2021)J/A+A/649/A26 : TOI-178 six transiting planets (Leleu+, 2021)J/AJ/162/75 : Speckle obs. TESS exoplanet host stars. II. (Lester+, 2021)J/AJ/161/56 : The TESS-Keck Survey. II. RVs of TOI-561 (Weiss+, 2021)J/AJ/162/55 : 65 Transit-timing variation planets properties (Yee+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/293https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/293http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/293https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/163/293https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/163/293http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/163/293GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/163/293/table2Radial velocities & spectral activity indicators measured from Keck/HIRES and TNG/HARPS-NrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[2458896/2459633] Barycentric Julian Date (BJD_TBD_)dtime.epochdoubleRVel[-17.9/15.8] Radial velocitym/sphys.veloc;pos.heliocentricdoublee_RVel[1/3] Error on RVelm/sstat.error;spect.dopplerVelocfloatSI[0/0.19] Spectral indexspect.indexfloate_SI[0.001/0.02] Error on SIstat.errorfloatInstInstrument used; HARPS or HIRESinstr.setupchar