J/ApJS/278/52ivo://CDS.VizieR/J/ApJS/278/52CDSHoward A.W.Sinukoff E.Blunt S.Petigura E.A.Crossfield I.J.M.,Isaacson H.Kosiarek M.Rubenzahl R.A.Brewer J.M.Fulton B.J.,Dressing C.D.Hirsch L.A.Knutson H.Livingston J.H.Mills S.M.,Roy A.Weiss L.M.Benneke B.Ciardi D.R.Christiansen J.L.,Cochran W.D.Crepp J.R.Gonzales E.Hansen B.M.S.Hardegree-Ullman K.,Howell S.B.Lepine S.Martinez A.O.Rogers L.A.Schlieder J.E.,Werner M.Polanski A.S.Angelo I.Beard C.Behmard A.Bouma L.G.,Brinkman C.L.Chontos A.Dai F.Dalba P.A.Giacalone S.,Grunblatt S.K.Hill M.L.Kane S.R.Lubin J.Mayo A.W.Mocnik T.,Murphy J.M.A.Rice M.Rosenthal L.J.Tyler D.Van Zandt J.Yee S.W.2026-05-26T09:00:57Z2026-05-07T08:56:59ZCDS support team

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

cds-question@unistra.frexoplanetsstellar-radiistellar-massesmetallicityradial-velocityphotometryvisible-astronomyspectroscopyWe report the masses, sizes, and orbital properties of 86 planets orbiting 55 stars observed by NASA's K2 Mission with follow-up Doppler measurements by the HIRES spectrometer at the W. M. Keck Observatory and the Automated Planet Finder at Lick Observatory. Eighty-one of the planets were discovered from their transits in the K2 photometry, while five were found based on subsequent Doppler measurements of transiting planet-host stars. The sizes of the transiting planets range from Earth-size to larger than Jupiter (1-3R_{Earth}_ is typical), while the orbital periods range from less than a day to a few months. For 32 of the planets, the Doppler signal was detected with significance greater than 5{sigma} (51 were detected with >3{sigma} significance). An important characteristic of this catalog is the use of uniform analysis procedures to determine stellar and planetary properties. This includes the transit search and fitting procedures applied to the K2 photometry, the Doppler fitting techniques applied to the radial velocities (RVs), and the spectral modeling to determine bulk stellar parameters. Such a uniform treatment will make the catalog useful for statistical studies of the masses, densities, and system architectures of exoplanetary systems. This work also serves as a data release for all previously unpublished RVs and associated stellar activity indicators obtained by our team for these systems, along with derived stellar and planet parameters.2025ApJS..278...52Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/278/52CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/other/Sci/330.653 : Detected planets in the Eta-Earth Survey (Howard+, 2010)J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)J/MNRAS/426/739 : Velocities for seven transiting hot Jupiters (Hellier+, 2012)J/A+A/582/A33 : K2-19b light curve (Armstrong+, 2015)J/ApJ/805/175 : Keck and APF radial velocities of HD7924 (Fulton+, 2015)J/ApJ/806/183 : Planet radii of Kepler Object of Interest (Wolfgang+, 2015)J/A+A/594/A100 : K2 new planetary and EB candidates (Barros+, 2016)J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)J/ApJS/226/7 : Planet cand. discovered using K2's 1st yr (Crossfield+, 2016)J/ApJ/829/L9 : K2 LC of HD 3167 and Robo-AO image (Vanderburg+, 2016)J/ApJS/222/14 : Planetary cand. from 1st yr K2 mission (Vanderburg+, 2016)J/AJ/154/122 : RVels for the HD 3167 system (Christiansen+, 2017)J/A+A/608/A35 : K2-18 HARPS time-series (Cloutier+, 2017)J/ApJ/836/167 : K2 planet. syst. around low-mass stars. I. (Dressing+, 2017)J/AJ/154/109 : California-Kepler Survey (CKS). III. Radii (Fulton+, 2017)J/AJ/154/123 : RVel follow-up of the HD 3167 system (Gandolfi+, 2017)J/A+A/608/A93 : K2-106 radial velocities measurements (Guenther+, 2017)J/AJ/154/237 : HARPS-N radial velocities of WASP-47 (Vanderburg+, 2017)J/ApJ/836/77 : A library of high-S/N optical sp. of FGKM stars (Yee+, 2017)J/ApJS/237/38 : Extended abundance analysis of KOIs (Brewer+, 2018)J/ApJS/239/5 : Variable stars and cand. planets from K2 (Crossfield+, 2018)J/A+A/615/A69 : K2-3 system with HARPS-N & HARPS (Damasso+, 2018)J/AJ/156/264 : California-Kepler Survey. VII. Radius gap (Fulton+, 2018)J/AJ/156/22 : Planetary candidates from K2 Campaign 16 (Yu+, 2018)J/A+A/621/A49 : K2-18 HARPS time-series (Cloutier+, 2019)J/A+A/624/A38 : Radial velocities of K2-36 (Damasso+, 2019)J/AJ/157/169 : Exoplanets from deep learning in K2 (Dattilo+, 2019)J/AJ/158/87 : Cool dwarfs during K2 Campaigns 1-17 (Dressing+, 2019)J/A+A/634/L4 : HST/STIS FUV spectra of K2-18 (dos Santos+, 2020)J/ApJS/247/28 : K2 star param. from Gaia & LAMOST (Hardegree-Ullman+, 2020)J/MNRAS/496/851 : Planet candidates from K2 Campaigns 1-13 (Wittenmyer+, 2020)J/AJ/159/154 : Exoplanet cand. in Campaign 5 of the K2 mission (Zink+, 2020)J/ApJS/254/39 : Exoplanet cand. from TESS first 2yr obs (Guerrero+, 2021)J/AJ/162/259 : Scaling K2. IV. Campaigns 1-8 & 10-18 (Zink+, 2021)J/A+A/668/A31 : A CHEOPS-enhanced view of the HD3167 system (Bourrier+, 2022)J/A+A/677/A33 : 38 Kepler and K2 systems RVs (Bonomo+, 2023)J/AJ/165/60 : TESS-Keck Survey. XIV. 2 exoplanets (Van Zandt+, 2023)J/AJ/165/262 : Scaling K2. VI. HIRES stellar param. (Zink+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/278/52https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/278/52http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/278/52https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/278/52https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/278/52http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/278/52GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/278/52/stars (Host star parameters (Table 1) and properties (Table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/278/52/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/278/52/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/278/52/stars?GETtext/xml+votable180.050000true8.73968424.38146780.005555555555555556Cone search capability for table J/ApJS/278/52/table3 (Derived properties of planets orbiting target stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/278/52/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/278/52/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/278/52/table3?GETtext/xml+votable180.050000true16.462276411.75342780.0055555555555555566/270 353 376 4268-4269 4271 4521 4632 4659 4704 4720 17291 17306 18132 18147 18163 18345 18350 18361 18453 18462 18539 18565 18569 18574 18588 18785 24223 24344 25427 25463 25614 25624 25673 25725 26252-26253 26278 26977 26990-26992 27056 27085 27548 27787 29349 42984 42986 42989 44317 48028 48121 48501https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/278/52?format=asciiOpticaldefaultJ/ApJS/278/52/starsHost star parameters (Table 1) and properties (Table 2)DEJ2000[0/29] Degree of declination (J2000)pos.eq.decVmag[8.9/13.6]? Apparent V-band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0.01/0.5]? Uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharprimaryf_NameFlag on Name (1)meta.codecharOther? Other namemeta.idcharEPIC[201357835/248777106] EPIC numbermeta.idlongTIC[2621213/2028887614] TIC numbermeta.idlongFieldFieldmeta.id;obs.fieldcharRAJ2000[0/23] Hour of right ascension (J2000)pos.eq.raHIRES[6/352] Number of RV observations from HIRES usedmeta.number;obsintAPF[0/125] Number of RV observations from APF usedmeta.number;obsintLit[0/389] Number of RV observations from literature usedmeta.number;obsintNp[1/5] Number of planets, n_p_meta.numberintNrvNumber of RV measurements for this star (link to Table 4)meta.numberintnullableVPVelocity Plotmeta.ref.urlcharTeff[3449/6364]? Effective temperatureKphys.temperature.effectiveintnullablee_Teff[30/189]? Lower uncertainty in TeffKstat.error;phys.temperature.effectiveintnullableE_Teff[52/189]? Uncertaity or upper uncertainty in Teff (if lower uncertainty is filled)Kstat.error;stat.maxintnullablelogg[3.58/4.74]? Log of surface gravityphys.gravityfloatnullablee_logg[0.006/0.2]? Uncertainty in loggstat.error;phys.gravityfloatnullable[Fe/H][-0.71/0.44]? Metallicityphys.abund.Zfloatnullablee_[Fe/H][0.04/0.13]? Uncertainty in [Fe/H]stat.error;phys.abund.FefloatnullableSHK[0.1/0.78]? S indexspect.indexfloatnullablelogRHK[-5.4/-4.4]? Log of chromospheric activity indexphot.flux;arith.ratiofloatnullablee_logRHK[0.03]? Uncertainty in logRHKstat.error;phot.flux;arith.ratiofloatnullablel_vsiniUpper limit flag on vsinimeta.code.error;phys.veloc.rotatcharvsini[0.1/13.3]? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_vsini[0.5/1.1]? Uncertainty in vsinikm/sstat.error;phys.veloc.rotatfloatnullableMs[0.3/1.5]? Stellar masssolMassphys.massfloatnullablee_Ms[0.016/0.16]? Uncertainty in Ms (or lower uncertainty if upper uncertainty is filled)solMassstat.error;phys.massfloatnullableE_Ms[0.017/0.08]? upper uncertainty in MssolMassstat.error;stat.maxfloatnullableRs[0.46/3.1]? Stellar radiussolRadphys.size.radiusfloatnullablee_Rs[0.01/0.2]? Uncertainty in Rs (or lower uncertainty if upper uncertainty is filled)solRadstat.error;phys.size.radiusfloatnullableE_Rs[0.03/1.2]? Upper Uncertainty in RssolRadstat.error;stat.maxfloatnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJS/278/52/table3Derived properties of planets orbiting target starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNamePlanet namemeta.id;meta.maincharPer[0.57/1088] Orbital perioddtime.perioddoublee_Per[4.3e-07/100] Lower uncertainty in Perdstat.error;stat.min;time.perioddoubleE_Per[4.3e-07/100] Upper uncertainty in Perdstat.error;stat.max;time.perioddoubleTime? Mid-transit time; barycentric Julian datedtime.epochdoublenullableSimbadNameSimbad column added by the CDSmeta.idcharnullablee_Time[3.2e-05/99]? Lower uncertainty in Timedstat.error;stat.min;time.epochdoublenullableE_Time[3.2e-05/65]? Upper uncertainty in Timedstat.error;stat.max;time.epochdoublenullableRad[1.1/46]? Radius(6.3781x10+6m)phys.size.radiusfloatnullablee_Rad[0.03/8]? Lower uncertainty in Rad(6.3781x10+6m)stat.error;stat.min;phys.size.radiusdoublenullableE_Rad[0.036/8]? Upper uncertainty in Rad(6.3781x10+6m)stat.error;stat.max;phys.size.radiusdoublenullablel_MassLimit on Massmeta.code.error;phys.masscharMass[-4.2/1142] Mass(5.97236x10+24kg)phys.massfloate_Mass[0.37/45]? Lower uncertainty in Mass(5.97236x10+24kg)stat.error;stat.min;phys.massfloatnullableE_Mass[0.37/53]? Upper uncertainty in Mass(5.97236x10+24kg)stat.error;stat.max;phys.massfloatnullablel_rhoLimit on rhometa.code.error;phys.densitycharrho[-1.6/40]? Densityg.cm**-3phys.densityfloatnullablee_rho[0.013/10]? Lower uncertainty in rhog.cm**-3stat.error;stat.min;phys.densityfloatnullableE_rho[0.016/12]? Upper uncertainty in rhog.cm**-3stat.error;stat.max;phys.densityfloatnullableTeq[186.1/2177]? Equilibrium temperatureKphys.temperaturefloatnullablee_Teq[1/147.5]? Lower uncertainty in TeqKstat.error;stat.min;phys.temperaturefloatnullableE_Teq[3/147.5]? Upper uncertainty in TeqKstat.error;stat.max;phys.temperaturefloatnullableFlux[0.285/5300]? Instellation flux in units of Earth fluxEarthphot.flux.boldoublenullablee_Flux[0.02/600]? Lower uncertainty in FluxEarthstat.error;stat.min;phot.flux.bolfloatnullableE_Flux[0.04/600]? Upper uncertainty in FluxEarthstat.error;stat.max;phot.flux.bolfloatnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJS/278/52/table4Radial velocity measurementsNameObject namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTime[2455198.5/2458309.1] Barycentric Julian datedtime.epochdoubleRV[-38039/76756] Radial velocity (1)m/sspect.dopplerVelocdoublee_RV[0.5/36] Uncertainty in RVm/sstat.error;spect.dopplerVelocfloatSHK[0/1.43]? S index (2)spect.indexfloatnullableInstInstrument (3)meta.id;instrchar