PHL's Exoplanets Catalog

Projects‎ > ‎The Habitable Exoplanets Catalog‎ > ‎HEC: Data of Potentially Habitable Worlds‎ > ‎

Last Update: July 2, 2018

Introduction

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 Name	Description	Units
01	P. Name	Planet name.
02	P. Name Kepler	Planet NASA Kepler name, if applicable.
03	P. Name KOI	Planet NASA Kepler Object of Interest (KOI) name, if applicable.
04	P. Zone Class	Planet habitable zone classification (hot, warm, or cold).
05	P. Mass Class	Planet Mass Class (mercurian, subterran, terran, superterran, neptunian, or jovian).
06	P. Composition Class	Planet Composition Class (iron, rocky-iron, rocky-water, water-gas, gas).
07	P. Atmosphere Class	Planet Atmosphere Class (none, metals-rich, hydrogen-rich).
08	P. Habitable Class	Planet Habitable Class (mesoplanet, thermoplanet, psychroplanet, hypopsychroplanet, hyperthermoplanet, non-habitable).
09	P. Min Mass	Planet minimum mass.	Earth Units, EU
10	P. Mass	Planet mass. Most of the values were estimated from minimum mass.	Earth Units, EU
11	P. Max Mass	Planet maximum mass.	Earth Units, EU
12	P. Radius	Planet radius. Most of these values were estimated for confirmed planets.	Earth Units, EU
13	P. Density	Planet density.	Earth Units, EU
14	P. Gravity	Planet gravity.	Earth Units, EU
15	P. Esc Vel	Planet escape velocity.	Earth Units, EU
16	P. SFlux Min	Planet minimum stellar flux.	Earth Units, EU
17	P. SFlux Mean	Planet mean stellar flux.	Earth Units, EU
18	P. SFlux Max	Planet maximum stellar flux.	Earth Units, EU
19	P. Teq Min	Planet minimum equilibrium temperature (at apastron).	Kelvins, K
20	P. Teq Mean	Planet mean equilibrium temperature.	Kelvins, K
21	P. Teq Max	Planet maximum equilibrium temperature (at periastron).	Kelvins, K
22	P. Ts Min	Planet minimum surface temperature (at apastron).	Kelvins, K
23	P. Ts Mean	Planet mean surface temperature.	Kelvins, K
24	P. Ts Max	Planet maximum surface temperature (at periastron).	Kelvins, K
25	P. Surf Press	Planet surface pressure.	Earth Units, EU
26	P. Mag	Planet magnitude as seen from a Moon-Earth distance (Moon = -12.7).
27	P. Appar Size	Planet apparent size as seen from a Moon-Earth distance (Moon = 0.5°).	degrees
28	P. Period	Planet period.	days
29	P. Sem Major Axis	Planet semi major axis.	Astr. Units, AU
30	P. Eccentricity	Planet eccentricity (assumed 0 when not available).
31	P. Mean Distance	Planet mean distance from the star.	Astr. Units, AU
32	P. Inclination	Planet inclination (assumed 60° when not available, and 90° for Kepler data).	degrees
33	P. Omega	Planet omega.	degrees
34	S. Name	Star name.
35	S. Name HD	Star name from the Henry Draper Star Catalog.
36	S. Name HIP	Star name from the Hipparchus Star Catalog.
37	S. Constellation	Star constellation name (abbreviated).
38	S. Type	Star type.
39	S. Mass	Star mass.	Solar Units, SU
40	S. Radius	Star radius.	Solar Units, SU
41	S. Teff	Star effective temperature.	Solar Units, SU
42	S. Luminosity	Star luminosity.	Solar Units, SU
43	S. [Fe/H]	Star iron to hydrogen ratio [Fe/H].
44	S. Age	Star age.	Billion Years, Gyrs
45	S. Appar Mag	Star apparent visual magnitude from Earth.
46	S. Distance	Star distance from Earth.	parsec, pc
47	S. RA	Star right ascension.	degrees
48	S. DEC	Star declination.	degrees
49	S. Mag from Planet	Star apparent visual magnitude from planet (Sun = -25 from Earth).
50	S. Size from Planet	Star apparent size from planet (Sun = 0.5° from Earth).	degrees
51	S. No. Planets	Star number of planets.
52	S. No. Planets	Star number of planets in the habitable zone.
53	S. Hab Zone Min	Star inner edge of habitable zone.	Astr. Units, AU
54	S. Hab Zone Max	Star outer edge of habitable zone.	Astr. Units, AU
55	P. HZD	Planet Habitable Zone Distance (HZD).
56	P. HZC	Planet Habitable Zone Composition (HZD).
57	P. HZA	Planet Habitable Zone Atmosphere (HZD).
58	P. HZI	Planet Habitable Zone Index (HZI).
59	P. SPH	Planet Standard Primary Habitability (SPH).
60	P. Int ESI	Planet Interior Earth Similarity Index (iESI).
61	P. Surf ESI	Planet Surface Earth Similarity Index (sESI).
62	P. ESI	Planet Earth Similarity Index (ESI).
63	S. HabCat	Star is in the HabCat database.	FLAG = 0 or 1
64	P. Habitable	Planet is potentially habitable.	FLAG = 0 or 1
65	P. Hab Moon	Planet is candidate for potential habitable exomoons.	FLAG = 0 or 1
66	P. Confirmed	Planet is confirmed (relevant to the Kepler data).	FLAG = 0 or 1
67	P. Disc. Method	Planet discovery method (rv = radial velocity, tran = transiting, ima = imaging, micro = micro lensing, pul = pulsar timing, ast = astrometry).
68	P. Disc. Year	Planet 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

Confirmed Exoplanets: phl_hec_all_confirmed.csv
NASA Kepler Candidates: phl_hec_all_kepler.csv

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 abel.mendez@upr.edu if you want to keep updated with major changes to the catalog.

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