The Habitable Exoplanets Catalog
Last Update: December 6, 2021
The Habitable Exoplanets Catalog is a database of potentially habitable worlds discovered by ground and space telescopes in the last decade. The exoplanet data comes from the NASA Exoplanet Archive and includes planets up to 2.5 Earth radii or 10 Earth masses orbiting within the optimistic stellar habitable zone to be as inclusive as possible. A more conservative sample includes planets up to 1.6 Earth radii or 3 Earth masses and thus more likely to be rocky.
subterran = 0.1 — 0.5 ME or 0.4 — 0.8 RE, terran = 0.5 — 3 ME or 0.8 — 1.6 RE, superterran = 3 — 10 ME or 1.6 — 2.5 RE. ME = Earth masses, and RE = Earth radii.
Conservative Sample of Potentially Habitable Exoplanets
This is a list of the exoplanets that are more likely to have a rocky composition and maintain surface liquid water (i.e., 0.5 < Planet Radius ≤ 1.6 Earth radii or 0.1 < Planet Minimum Mass ≤ 3 Earth masses). They are represented artistically in the top image.
Optimistic Sample of Potentially Habitable Exoplanets
This is a list of the exoplanets that are less likely to have a rocky composition or maintain surface liquid water (i.e. 1.6 < Planet Radius ≤ 2.5 Earth radii or 3 < Planet Minimum Mass ≤ 10 Earth masses). Some of these planets might turn out to be ocean worlds or mini-Neptunes.
Habitable Zone Plot
The figure above shows all planets near the habitable zone (darker green shade is the conservative habitable zone and the lighter green shade is the optimistic habitable zone). Only those planets less than 10 Earth masses or 2.5 Earth radii are labeled. The different limits of the habitable zone are described in Kopparapu et al. (2014). Size of the circles corresponds to the radius of the planets (estimated from a mass-radius relationship when not available). Larger version here. Credit: PHL @ UPR Arecibo.
Location in the night sky of all the known stellar systems with potentially habitable worlds (some systems have more than one planet). Click the image to enlarge. Larger version here. Credit: PHL @ UPR Arecibo, Jim Cornmell.
Stellar System Plots (Conservative Sample)