NASA Exoplanets Observations

This dataset presents a comprehensive collection of exoplanetary data sourced from NASA’s Exoplanet Archive. It includes essential attributes for each exoplanet, such as radius, mass, orbital period, discovery method, and more. These observations contribute to NASA’s mission to identify and study planets beyond our solar system, offering valuable insights into the field of exoplanetary science.

This dataset includes information sourced from NASA's Exoplanet Archive. NASA is the original source of the data.

This dataset was retrieved from the publicly accessible NASA Exoplanet Archive on November 10, 2024. Managed by the California Institute of Technology’s Infrared Processing and Analysis Center (IPAC) on behalf of NASA, this archive serves as a critical resource for astronomers and researchers globally.

To improve usability, the following data cleaning steps were applied:

1. The first column, containing only row labels, was removed.
2. Metadata occupying the first 100 rows of the original CSV file was excluded.
3. The pl_refname, st_refname, and sy_refname columns were formatted to display only the hyperlink references, originally encoded with HTML markup for NASA’s web interface.
4. Rows with a pl_controv_flag value of 1 were removed, as this flag indicates planets with disputed existence. Only planets with a pl_controv_flag of 0, indicating no controversy, were retained.
   Thirty entries for planets, classified as controversial or unconfirmed, have been removed.

This dataset is derived from NASA's Exoplanet Archive. While NASA provides open access to its data, it's important to note that the inclusion of this information does not imply any endorsement by NASA or its employees of any products, services, or activities associated with this dataset. Users are advised to avoid using NASA's name, logos, or imagery in a manner that could be interpreted as an endorsement.

Column Descriptions

• pl_name: Name of the exoplanet.
• hostname: Name of the host star.
• default_flag: Indicates the preferred data set (1 = default).
• sy_snum: Number of stars in the system.
• sy_pnum: Number of planets in the system.
• discoverymethod: Method used to discover the exoplanet.
• disc_year: Year the exoplanet was discovered.
• disc_facility: Facility or observatory that discovered the exoplanet.
• soltype: Solution type for the data entry (e.g., Published, Candidate).
• pl_refname: Reference for planetary data source.
• pl_orbper: Orbital period of the planet in days.
• pl_orbpererr1: Upper uncertainty of the orbital period.
• pl_orbpererr2: Lower uncertainty of the orbital period.
• pl_orbperlim: Limit flag for orbital period data.
• pl_orbsmax: Semi-major axis of the orbit in astronomical units (au).
• pl_orbsmaxerr1: Upper uncertainty of the semi-major axis.
• pl_orbsmaxerr2: Lower uncertainty of the semi-major axis.
• pl_orbsmaxlim: Limit flag for semi-major axis data.
• pl_rade: Planet radius in Earth radii.
• pl_radeerr1: Upper uncertainty of planet radius in Earth radii.
• pl_radeerr2: Lower uncertainty of planet radius in Earth radii.
• pl_radelim: Limit flag for planet radius data.
• pl_radj: Planet radius in Jupiter radii.
• pl_radjerr1: Upper uncertainty of planet radius in Jupiter radii.
• pl_radjerr2: Lower uncertainty of planet radius in Jupiter radii.
• pl_radjlim: Limit flag for radius in Jupiter radii data.
• pl_bmasse: Planet mass in Earth masses.
• pl_bmasseerr1: Upper uncertainty of planet mass in Earth masses.
• pl_bmasseerr2: Lower uncertainty of planet mass in Earth masses.
• pl_bmasselim: Limit flag for planet mass in Earth masses.
• pl_bmassj: Planet mass in Jupiter masses.
• pl_bmassjerr1: Upper uncertainty of planet mass in Jupiter masses.
• pl_bmassjerr2: Lower uncertainty of planet mass in Jupiter masses.
• pl_bmassjlim: Limit flag for planet mass in Jupiter masses.
• pl_bmassprov: Provenance of planet mass measurement (e.g., Msini).
• pl_orbeccen: Orbital eccentricity of the planet.
• pl_orbeccenerr1: Upper uncertainty of orbital eccentricity.
• pl_orbeccenerr2: Lower uncertainty of orbital eccentricity.
• pl_orbeccenlim: Limit flag for orbital eccentricity data.
• pl_insol: Insolation flux (amount of stellar radiation) in Earth flux.
• pl_insolerr1: Upper uncertainty of insolation flux.
• pl_insolerr2: Lower uncertainty of insolation flux.
• pl_insollim: Limit flag for insolation flux.
• pl_eqt: Equilibrium temperature of the planet in Kelvin.
• pl_eqterr1: Upper uncertainty of equilibrium temperature.
• pl_eqterr2: Lower uncertainty of equilibrium temperature.
• pl_eqtlim: Limit flag for equilibrium temperature.
• ttv_flag: Flag indicating if there are Transit Timing Variations (1 = yes).
• st_refname: Reference for stellar data source.
• st_spectype: Spectral type of the host star.
• st_teff: Stellar effective temperature in Kelvin.
• st_tefferr1: Upper uncertainty of stellar temperature.
• st_tefferr2: Lower uncertainty of stellar temperature.
• st_tefflim: Limit flag for stellar temperature.
• st_rad: Stellar radius in Solar radii.
• st_raderr1: Upper uncertainty of stellar radius.
• st_raderr2: Lower uncertainty of stellar radius.
• st_radlim: Limit flag for stellar radius.
• st_mass: Stellar mass in Solar masses.
• st_masserr1: Upper uncertainty of stellar mass.
• st_masserr2: Lower uncertainty of stellar mass.
• st_masslim: Limit flag for stellar mass.
• st_met: Stellar metallicity ([Fe/H] value).
• st_meterr1: Upper uncertainty of stellar metallicity.
• st_meterr2: Lower uncertainty of stellar metallicity.
• st_metlim: Limit flag for stellar metallicity.
• st_metratio: Stellar metallicity ratio.
• st_logg: Stellar surface gravity in log(cm/s^2).
• st_loggerr1: Upper uncertainty of surface gravity.
• st_loggerr2: Lower uncertainty of surface gravity.
• st_logglim: Limit flag for surface gravity.
• sy_refname: Reference for system data source.
• rastr: Right Ascension of the star (sexagesimal format).
• ra: Right Ascension of the star in degrees.
• decstr: Declination of the star (sexagesimal format).
• dec: Declination of the star in degrees.
• sy_dist: Distance to the star in parsecs.
• sy_disterr1: Upper uncertainty of distance.
• sy_disterr2: Lower uncertainty of distance.
• sy_vmag: Visual magnitude (brightness) of the star.
• sy_vmagerr1: Upper uncertainty of visual magnitude.
• sy_vmagerr2: Lower uncertainty of visual magnitude.
• sy_kmag: K-band (infrared) magnitude of the star.
• sy_kmagerr1: Upper uncertainty of K-band magnitude.
• sy_kmagerr2: Lower uncertainty of K-band magnitude.
• sy_gaiamag: Gaia magnitude of the star.
• sy_gaiamagerr1: Upper uncertainty of Gaia magnitude.
• sy_gaiamagerr2: Lower uncertainty of Gaia magnitude.
• rowupdate: Date of the last update for this row.
• pl_pubdate: Publication date of planetary parameters.
• releasedate: Date the data was released.