Exoplanet and Candidate Statistics

On this page we have assembled statistics for various categories of confirmed exoplanets and Kepler candidates. All values here come from the Confirmed Planets and KOI Cumulative interactive tables.

The Exoplanet Archive's collection of known exoplanets have been discovered using a variety of methods, and many have been detected using more than one method. The following tables shows the number of planets contained within the Exoplanet Archive whose discovery can be attributed to a particular technique. The criteria by which a planet is included in the Exoplanet Archive may be found on our Exoplanet Criteria page.

Clicking on a link will return a pre-filtered interactive table for that particular data set. For more information about building your own custom search queries, see the Pre-filtering Tables help document.

Kepler Mission Counts

Confirmed Planets1
(mission and community)
992
Candidates and Confirmed in Habitable Zone 1, 2
(180 K < Equilibrium (T) < 310 K)
304
Kepler Project Candidates 2 4229
Total Candidates and Confirmed Planets3 4261

1 Confirmed Planets are all planets in the Confirmed Planet table where the planetary signature is present in Kepler data.

2 Kepler Project Candidates are all KOIs marked by the Kepler Project as a CANDIDATE in the KOI Cumulative table. This includes planets that have been confirmed or validated.

3 Total Candidates and Confirmed Planets is the union of the Confirmed Planets and KOI Cumulative data sets. Note that some confirmed planets were never designated as candidates.

Kepler Candidate Statistics

Radius Range All
Equilibrium (T)
Equilibrium (T) between 180 and 310 K
R ≤ 1.25 R_Earth 738 7
1.25 < R ≤ 2 R_Earth 1275 70
2 < R ≤ 6 R_Earth 1706 164
6 < R ≤ 15 R_Earth 288 35
15 R_Earth < R 222 24