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Exoplanet and Candidate
Statistics
On this page we have assembled statistics for various categories of confirmed exoplanets, TESS candidates, and Kepler candidates. The values here come from confirmed planet data in the Planetary Systems interactive table, and candidate data from the KOI Cumulative table; TESS Project Candidate counts are from ExoFOP-TESS.
The Exoplanet Archive's collection of known exoplanets were discovered using a variety of methods, and many have been detected using multiple methods. The following tables show 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 is described on our Exoplanet Criteria page.
Clicking on a link returns 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.
For a list of published, refereed papers that derive planet occurrence rates, please see our Planet Occurrence Rate Papers page. (This list is not exhaustive; to suggest a paper, please submit a Helpdesk ticket.)
Summary Counts
5759
2773
1982
548
975
557
7217
7236
4626
1 Confirmed Planets Discovered by TESS refers to the number planets that have been published in the refereed astronomical literature.
2 TESS Project Candidates refers to the total number of transit-like events that appear to be astrophysical in origin, including false positives as identified by the TESS Project.
3 TESS Project Candidates Yet To Be Confirmed refers to the number of TESS Project Candidates that have not yet been dispositioned as a Confirmed Planet or False Positive.
Confirmed Exoplanet Statistics
Discovery Method
Number of Planets
Kepler Mission Counts
3
2773
82
1091
4291
Candidates and Confirmed in Habitable Zone 1, 3
(180 K < Equilibrium (T) < 310 K) or
(0.25 < Insolation (Earth flux) < 2.2)
361
4717
30
1982
17
Total Candidates and Confirmed Planets 4
4781
225
8
2
9
1 This is the number of planets in the Kepler Field where the stellar host was observed by the Kepler Spacecraft. Not all of these planets were detected or discovered by Kepler.
2 This is the number of planets that were discovered utilizing Kepler observations.
1
3 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.
4 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.
Exoplanet Mass and Radius
1799
982
Kepler Candidate Statistics
Radius Range
All Candidates
Insolation between 0.32 and 1.78
4263
R ≤ 1.25 R_Earth
1.25 < R ≤ 2 R_Earth
2 < R ≤ 6 R_Earth
Counts by Radius
6 < R ≤ 15 R_Earth
533
15 R_Earth < R
1086
1863
646
205
K2 Mission Counts
548
975
Counts by Radius
-
91
302
215
182
317
692
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