Like the Confirmed Planet table, the Composite Planet Data table provides a collection of stellar and planetary parameters for confirmed exoplanets, one row per planet. However, in this case, where there are gaps in the parameters for a given planet (usually because the default literature reference did not provide them), the table automatically selects the data from other available literature references for the same planet. The selections are based on a hierarchy of selection criteria (i.e., best precision, most recent). For a definition of default parameters, see the Exoplanet Criteria page.
Users should treat the Composite Planet Data table with caution: data may not be selfconsistent if drawn from multiple sources! See About the Composite Planet Data Table for more information.
This page lists and defines all of the data columns in the Composite Planet Data (compositepars
) table that can be returned through the Exoplanet Archive that can be returned through the Exoplanet Archive's application programming interface (API), or when using the Composite Planet Data interactive table. These column names can also be specified in prefiltered table queries.
There are similar documents for other data sets. The full list is in the API User Guide in the Data Available Through the API section (click on the documentation links).
Some data include more specific information that can also be retrieved as separate calls in the API. These include:
The stellar parameters listed for circumbinary planets (e.g. Kepler16) are for the primary star.
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Database Column Name 
Table Label  Description  Uncertainties Column (positive +) (negative ) 
Displayed String Name  Limit Column 

fpl_hostname†  Host Name  Stellar name most commonly used in the literature.  
fpl_letter†  Planet Letter  Letter assigned to the planetary component of a planetary system.  
fpl_name†  Planet Name  Planet name most commonly used in the literature.  
fpl_discmethod†  Discovery Method  Method by which the planet was first identified.  
fpl_disc†  Year of Discovery  Year the planet was discovered  
fpl_controvflag†  Controversial Flag  Flag indicating whether the confirmation status of a planet has been questioned in the published literature (1=yes, 0=no)  
fpl_orbper†  Orbital Period (days)  Time the planet takes to make a complete orbit around the host star or system.  (+) fpl_orbpererr1 () fpl_orbpererr2 
fpl_orbperstr  fpl_orbperlim 
fpl_orbperreflink†  Orbital Period Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_smax†  Orbit SemiMajor Axis (AU)  The longest radius of an elliptic orbit, or, for exoplanets detected via gravitational microlensing or direct imaging, the projected separation in the plane of the sky.  (+) fpl_smaxerr1 () fpl_smaxerr2 
fpl_smaxstr  fpl_smaxlim 
fpl_smaxreflink†  Orbit SemiMajor Axis Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_eccen†  Eccentricity  Amount by which the orbit of the planet deviates from a perfect circle.  (+) fpl_eccenerr1 () fpl_eccenerr2 
fpl_eccenstr  fpl_orbeccenlim 
fpl_eccenreflink†  Eccentricity Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_bmasse†  Planet Mass or M*sin(i) [Earth mass]  Best planet mass estimate available, in order of preference: Mass, M*sin(i)/sin(i), or M*sin(i), depending on availability, and measured in Earth masses. See Planet Mass M*sin(i) Provenance (fpl_bmassprov) to determine which measure applies.  (+) fpl_bmasseerr1 () fpl_bmasseerr2 
fpl_bmassestr  fpl_bmasselim 
fpl_bmassj  Planet Mass or M*sin(i) [Jupiter mass]  Best planet mass estimate available, in order of preference: Mass, M*sin(i)/sin(i), or M*sin(i), depending on availability, and measured in Jupiter masses. See Planet Mass M*sin(i) Provenance (fpl_bmassprov) to determine which measure applies.  (+) fpl_bmassjerr1 () fpl_bmassjerr2 
fpl_bmassjstr  fpl_bmassjlim 
fpl_bmassprov†  Planet Mass or M*sin(i) Provenance  Provenance of the measurement of the best mass. Options are: Mass, M*sin(i)/sin(i), and M*sini.  
fpl_bmassreflink†  Planet Mass or M*sin(i) Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_rade†  Planet Radius [Earth radii]  Length of a line segment from the center of the planet to its surface, measured in units of radius of the Earth.  (+) fpl_radeerr1 () fpl_radeerr2 
fpl_radestr  fpl_radelim 
fpl_radj  Planet Radius[Jupiter radii] 
Length of a line segment from the center of the planet
to its surface, measured in units of radius of Jupiter. 
(+) fpl_radjerr1 () fpl_radjerr2 
fpl_radjstr  fpl_radjlim 
fpl_rads  Planet Radius [Solar]  Length of a line segment from the center of the planet to its surface, measured in units of radius of the Sun.  (+)f pl_radserr1 () fpl_radserr2 
fpl_radsstr  fpl_radserrlim 
fpl_radreflink†  Planet Radius Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_dens†  Planet Density (g/cm**3)  Amount of mass per unit of volume of the planet.  (+) fpl_denserr1 () fpl_denserr2 
fpl_densstr  fpl_denslim 
fpl_densreflink†  Planet Density Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_eqt†  Planet Equilibrium Temperature [K]  The equilibrium temperature of the planet as modeled by a black body heated only by its host star, or for directly imaged planets, the effective temperature of the planet required to match the measured luminosity if the planet were a black body.  (+) fpl_eqterr1 () fpl_eqterr2 
fpl_eqtstr  fpl_eqtlim 
fpl_eqtreflink†  Equilibrium Temperature Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_insol†  Insolation Flux [Earth flux]  Insolation flux is another way to give the equilibrium temperature. It's given in units relative to those measured for the Earth from the Sun.  (+) fpl_insolerr1 () fpl_insolerr2 
fpl_insolstr  fpl_insollim 
fpl_insolreflink†  Insolation Flux Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fpl_tranflag  Planet Transit Flag  Flag indicating if the planet transits its host star (1=yes, 0=no)  
fpl_cbflag  Circumbinary Flag  Flag indicating whether the planet orbits a binary system (1=yes, 0=no) 
Database Column Name 
Table Label  Description  Uncertainties Column (positive +) (negative ) 
Displayed String Name  Limit Column 

fpl_snum  Number of Stars in System  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
ra_str†  RA [sexagesimal]  Right Ascension of the planetary system in sexagesimal format.  
dec_str†  Dec [sexagesimal]  Declination of the planetary system in sexagesimal notation.  
ra  RA [decimal degrees]  Right Ascension of the planetary system in decimal degrees.  
dec  Dec [decimal degrees]  Declination of the planetary system in decimal degrees.  
fst_posreflink†  RA/Dec Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fst_dist†  Distance [pc]  Distance to the planetary system in units of parsecs.  (+) fst_disterr1 () fst_disterr2 
fst_diststr  fst_distlim 
fst_distreflink†  Distance Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value.  
fst_optmag†  Optical Magnitude [mag]  Brightness of the host star as measured using the V (Johnson) or the Keplerband in units of magnitudes.  fst_optmagerr 
fst_optmagstr  fst_optmaglim 
fst_optmagband†  Optical Magnitude Band  Band corresponding to the Optical Magnitude. Options are: V (Johnson) or Keplerband. 


fst_optmagreflink†  Optical Magnitude Reference  The paper that published this value.  
fst_nirmag†  NearIR Magnitude [mag]  Brightness of the host star as measured using the Ks (2MASS) or the J (2MASS) in units of magnitudes.  fst_nirmagerr 
fst_nirmagstr  fst_nirmaglim 
fst_nirmagband†  NearIR Magnitude Band  Band corresponding to the NearIR Magnitude. Options are: Ks (2MASS) or J (2MASS). 


fst_nirmagreflink†  NearIR Magnitude Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_spt†  Spectral Type  Classification of the star based on their spectral characteristics following the MorganKeenan system.  st_spstrerr  st_spstrstr  st_spstrlim 
fst_sptreflink†  Spectral Type Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_teff†  Effective Temperature [K] 
Temperature of the star as modeled by a
black body emitting the same total amount
of electromagnetic radiation. 
(+) fst_tefferr1 () fst_tefferr2 
fst_teffstr  fst_tefflim 
fst_teffreflink†  Effective Temperature Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_logg†  Stellar Surface Gravity [log10(cm/s**2)]  Gravitational acceleration experienced at the stellar surface.  (+) fst_loggerr1 () st_loggerr2 
fst_loggstr  fst_logglim 
fst_loggreflink†  Stellar Surface Gravity Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_lum†  Stellar Luminosity [log(Solar luminosity)]  Amount of energy emitted by a star per unit time, measured in units of solar luminosities.  (+) st_lumerr1 () st_lumerr2 
fst_lumstr  fst_lumlim 
fst_lumreflink†  Stellar Luminosity Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_mass†  Stellar Mass [Solar mass]  Amount of matter contained in the star, measured in units of masses of the Sun.  (+) fst_masserr1 () fst_masserr2 
fst_massstr  fst_masslim 
fst_massreflink†  Stellar Mass Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_rad†  Stellar Radius [Solar radii] 
Length of a line segment from the center of the star
to its surface, measured in units of radius of the Sun. 
(+) fst_raderr1 () fst_raderr2 
fst_radstr  fst_radsim 
fst_radreflink†  Stellar Radius Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_met†  Stellar Metallicity [dex]  Measurement of the metal content of the photosphere of the star as compared to the hydrogen content.  (+) fst_meterr1 () st_metfeerr2 
fst_metstr  fst_metlim 
fst_metratio†  Metallicity Ratio  Ratio for the Metallicity Value ([Fe/H] denotes iron abundance, [M/H] refers to a general metal content)  
fst_metreflink†  Stellar Metallicity Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 


fst_age†  Stellar Age [Gyr]  The age of the host star.  (+) fst_ageerr1 () fst_ageerr2 
fst_agestr  fst_agelim 
fst_agereflink†  Stellar Age Reference  A link to either the paper that published this value, or an explanation of the archive's calculation that produced this value. 

Last updated: 12 February 2019