PHL's Exoplanets Catalog

Last Update: July 2, 2018


The PHL's Exoplanets Catalog (PHL-EC) contains observed and modeled parameters for all currently confirmed exoplanets from the Extrasolar Planets Encyclopedia and NASA Kepler candidates from the NASA Exoplanet Archive, including those potentially habitable. It also contains a few still unconfirmed exoplanets of interest. The main difference between PHL-EC and other exoplanets databases is that it contains more estimated stellar and planetary parameters, habitability assessments with various habitability metrics, planetary classifications, and many corrections. Some interesting inclusions are the identification of those stars in the Catalog of Nearby Habitable Systems (HabCat), the apparent size and brightness of stars and planets as seen from a vantage point (i.e. moon-Earth distance), and the location constellation of each planet.

Many scientists use the PHL-EC and its derived products, like The Habitable Exoplanets Catalog and The Periodic Table of Exoplanets, for research or educational purposes. Software tools, such as the Google Android application Exoplanet Explorer, also use the catalog for visualizations. The PHL-EC is available as a comma separated value format (CSV) file at the bottom of this page. It is easily readable by spreadsheets like MS Excel and by most scientific plotting software.

The database is still in BETA and many changes and expansions are expected in the near future.

Database Field Descriptions

 #Field NameDescriptionUnits
 01 P. NamePlanet name. 
 02 P. Name KeplerPlanet NASA Kepler name, if applicable. 
 03 P. Name KOIPlanet NASA Kepler Object of Interest (KOI) name, if applicable. 
 04 P. Zone ClassPlanet habitable zone classification (hot, warm, or cold). 
 05 P. Mass ClassPlanet Mass Class (mercurian, subterran, terran, superterran, neptunian, or jovian). 
 06 P. Composition ClassPlanet Composition Class (iron, rocky-iron, rocky-water, water-gas, gas). 
 07 P. Atmosphere ClassPlanet Atmosphere Class (none, metals-rich, hydrogen-rich). 
 08 P. Habitable ClassPlanet Habitable Class (mesoplanet, thermoplanet, psychroplanet, hypopsychroplanet, hyperthermoplanet, non-habitable). 
 09 P. Min MassPlanet minimum mass.Earth Units, EU
 10 P. MassPlanet mass. Most of the values were estimated from minimum mass.Earth Units, EU
 11 P. Max MassPlanet maximum mass.Earth Units, EU
 12 P. RadiusPlanet radius. Most of these values were estimated for confirmed planets.Earth Units, EU
 13 P. DensityPlanet density.Earth Units, EU
 14 P. GravityPlanet gravity.Earth Units, EU
 15 P. Esc VelPlanet escape velocity.Earth Units, EU
 16 P. SFlux MinPlanet minimum stellar flux.Earth Units, EU
 17 P. SFlux MeanPlanet mean stellar flux.Earth Units, EU
 18 P. SFlux MaxPlanet maximum stellar flux.Earth Units, EU
 19 P. Teq MinPlanet minimum equilibrium temperature (at apastron).Kelvins, K
 20 P. Teq MeanPlanet mean equilibrium temperature.Kelvins, K
 21 P. Teq MaxPlanet maximum equilibrium temperature (at periastron).Kelvins, K
 22 P. Ts MinPlanet minimum surface temperature (at apastron).Kelvins, K
 23 P. Ts MeanPlanet mean surface temperature.Kelvins, K
 24 P. Ts MaxPlanet maximum surface temperature (at periastron).Kelvins, K
 25 P. Surf PressPlanet surface pressure.Earth Units, EU
 26 P. MagPlanet magnitude as seen from a Moon-Earth distance (Moon = -12.7).
 27 P. Appar SizePlanet apparent size as seen from a Moon-Earth distance (Moon = 0.5°).degrees
 28 P. PeriodPlanet period.days
 29 P. Sem Major AxisPlanet semi major axis.Astr. Units, AU
 30 P. EccentricityPlanet eccentricity (assumed 0 when not available).
 31 P. Mean DistancePlanet mean distance from the star.Astr. Units, AU
 32 P. InclinationPlanet inclination (assumed 60° when not available, and 90° for Kepler data).degrees
 33 P. OmegaPlanet omega.degrees
 34 S. NameStar name.
 35 S. Name HDStar name from the Henry Draper Star Catalog. 
 36 S. Name HIPStar name from the Hipparchus Star Catalog. 
 37 S. ConstellationStar constellation name (abbreviated). 
 38 S. TypeStar type.
 39 S. MassStar mass.Solar Units, SU
 40 S. RadiusStar radius.Solar Units, SU
 41 S. TeffStar effective temperature.Solar Units, SU
 42 S. LuminosityStar luminosity.Solar Units, SU
 43 S. [Fe/H]Star iron to hydrogen ratio [Fe/H].
 44 S. AgeStar age.Billion Years, Gyrs
 45 S. Appar MagStar apparent visual magnitude from Earth.
 46 S. DistanceStar distance from Earth.parsec, pc
 47 S. RAStar right ascension.degrees
 48 S. DECStar declination.degrees
 49 S. Mag from PlanetStar apparent visual magnitude from planet (Sun = -25 from Earth).
 50 S. Size from PlanetStar apparent size from planet (Sun = 0.5° from Earth).degrees
 51 S. No. PlanetsStar number of planets. 
 52 S. No. PlanetsStar number of planets in the habitable zone. 
 53 S. Hab Zone MinStar inner edge of habitable zone.Astr. Units, AU
 54 S. Hab Zone MaxStar outer edge of habitable zone.Astr. Units, AU
 55 P. HZDPlanet Habitable Zone Distance (HZD).
 56 P. HZCPlanet Habitable Zone Composition (HZD).
 57 P. HZAPlanet Habitable Zone Atmosphere (HZD).
 58 P. HZIPlanet Habitable Zone Index (HZI). 
 59 P. SPHPlanet Standard Primary Habitability (SPH).
 60 P. Int ESIPlanet Interior Earth Similarity Index (iESI).
 61 P. Surf ESIPlanet Surface Earth Similarity Index (sESI).
 62 P. ESIPlanet Earth Similarity Index (ESI).
 63 S. HabCatStar is in the HabCat database.FLAG = 0 or 1
 64 P. HabitablePlanet is potentially habitable.FLAG = 0 or 1 
 65 P. Hab MoonPlanet is candidate for potential habitable exomoons.FLAG = 0 or 1
 66 P. ConfirmedPlanet is confirmed (relevant to the Kepler data).FLAG = 0 or 1
 67 P. Disc. MethodPlanet discovery method (rv = radial velocity, tran = transiting, ima = imaging, micro = micro lensing, pul = pulsar timing, ast = astrometry). 
 68 P. Disc. YearPlanet discovery year. 

Table Notes:
  • Surface temperature and pressure [Fields 22-25] were modeled assuming an atmosphere to planet mass ratio similar to Earth with a warming effect due to 1% atmospheric CO2. These values only apply to planets with solid surfaces.
  • Stellar luminosity was estimated, when not available, from stellar mass or from magnitude, distance, and spectral type.
  • The numbers of digits in each field of the database was selected for readability and it is not necessarily related to the actual precision of the values.

CSV Database Files

DISCLAIMER: The PHL's Exoplanets Catalog combines measured and modeled parameters from various sources. It is good for visualizations, statistical analyses, and education. For research purposes always check measured vs modeled values from the original scientific papers. If you use this dataset please credit PHL's Exoplanet Catalog of the Planetary Habitability Laboratory @ UPR Arecibo. Send an email to if you want to keep updated with major changes to the catalog.

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