One row per confirmed exoplanet from NASA's Exoplanet Archive Planetary
Systems Composite Parameters (pscomppars) table. Each row carries
the archive's best composite parameter values, with the planet's host
star properties already merged in. Column names have been simplified for
classroom use; the original NASA short name for each column is listed in
the archive_name field of the data dictionary
(system.file("extdata", "data_dictionary_planets.csv", package = "exoplanets")).
Format
A data frame with 6278 rows and 28 variables:
- planet_name
(character) Planet name most commonly used in the literature.
- host_name
(character) Stellar name most commonly used in the literature.
- n_stars
(numeric) Number of gravitationally bound stars in the planetary system.
- n_planets
(numeric) Number of confirmed planets in the planetary system.
- discovery_method
(factor) Method by which the planet was first identified (e.g. Transit, Radial Velocity).
- discovery_year
(integer) Year the planet was discovered.
- discovery_facility
(character) Name of the facility making the discovery observations.
- orbital_period_days
(numeric, days) Time the planet takes to complete one orbit around its host (system).
- semi_major_axis_au
(numeric, au) Longest radius of the elliptic orbit; for microlensing/imaging detections, the projected sky-plane separation.
- eccentricity
(numeric) Amount by which the orbit deviates from a perfect circle (0 = circular).
- inclination_deg
(numeric, deg) Angle of the orbit plane relative to the plane perpendicular to Earth's line of sight.
- radius_earth
(numeric, Earth radii) Planet radius measured in units of Earth's radius.
- radius_jupiter
(numeric, Jupiter radii) Planet radius measured in units of Jupiter's radius.
- mass_earth
(numeric, Earth masses) Best mass estimate (Mass, M*sin(i)/sin(i), or M*sin(i)) in Earth masses.
- mass_jupiter
(numeric, Jupiter masses) Best mass estimate (Mass, M*sin(i)/sin(i), or M*sin(i)) in Jupiter masses.
- density_g_cm3
(numeric, g/cm^3) Planet mass per unit volume.
- eq_temp_k
(numeric, K) Equilibrium temperature assuming a black-body planet heated by its host star.
- insolation_earth
(numeric, Earth flux) Stellar flux at the planet relative to Earth's solar flux.
- star_spec_type
(character) Morgan-Keenan spectral classification of the host star.
- star_temp_k
(numeric, K) Black-body temperature emitting the same total electromagnetic radiation as the star.
- star_radius_solar
(numeric, Solar radii) Stellar radius in units of the Sun's radius.
- star_mass_solar
(numeric, Solar masses) Stellar mass in units of the Sun's mass.
- star_metallicity_dex
(numeric, dex) Metal content of the stellar photosphere relative to hydrogen.
- star_log_g
(numeric, log10(cm/s^2)) Gravitational acceleration at the stellar surface (log10).
- star_age_gyr
(numeric, Gyr) Age of the host star in billions of years.
- ra_deg
(numeric, deg) Right ascension of the planetary system in decimal degrees.
- dec_deg
(numeric, deg) Declination of the planetary system in decimal degrees.
- distance_pc
(numeric, pc) Distance to the planetary system in parsecs.
Source
NASA Exoplanet Archive Planetary Systems columns documentation: https://exoplanetarchive.ipac.caltech.edu/docs/API_PS_columns.html. Retrieved via the REXoplanets package.