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
| All Exoplanets | 5788 |
| Confirmed Planets Discovered by Kepler | 2778 |
| Kepler Project Candidates Yet To Be Confirmed | 1982 |
| Confirmed Planets Discovered by K2 | 548 |
| K2 Candidates Yet To Be Confirmed | 975 |
| Confirmed Planets Discovered by TESS 1 | 571 |
| TESS Project Candidates Integrated into Archive 2 | 7351 |
| Current date TESS Project Candidates at ExoFOP | |
| TESS Project Candidates Yet To Be Confirmed 3 | 4716 |
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. |
|
| Discovery Method | Number of Planets |
|---|---|
| Astrometry | 3 |
| Imaging | 82 |
| Radial Velocity | 1094 |
| Transit | 4310 |
| Transit timing variations | 32 |
| Eclipse timing variations | 17 |
| Microlensing | 230 |
| Pulsar timing variations | 8 |
| Pulsation timing variations | 2 |
| Orbital brightness modulations | 9 |
| Disk Kinematics | 1 |
| Transiting Exoplanets | 4357 |
| All Exoplanets | 5788 |
| Confirmed Planets with mass | 1813 |
| Confirmed Planets with m sin i | 983 |
| Confirmed Planets with radius | 4352 |
| R ≤ 1.25 R_Earth | 536 |
| 1.25 < R ≤ 2 R_Earth | 1089 |
| 2 < R ≤ 6 R_Earth | 1871 |
| 6 < R ≤ 15 R_Earth | 650 |
| 15 R_Earth < R | 206 |
| M ≤ 3 M_Earth | 92 |
| 3 < M ≤ 10 M_Earth | 303 |
| 10 < M ≤ 30 M_Earth | 215 |
| 30 < M ≤ 100 M_Earth | 184 |
| 100 < M ≤ 300 M_Earth | 322 |
| 300 M_Earth < M | 697 |
| Confirmed Planets Discovered by Kepler 2 | 2778 |
| Candidates and Confirmed in Habitable Zone 1, 3 (180 K < Equilibrium (T) < 310 K) or (0.25 < Insolation (Earth flux) < 2.2) |
361 |
| Kepler Project Candidates 3 | 4717 |
| Kepler Project Candidates Yet To Be Confirmed | 1982 |
| Total Candidates and Confirmed Planets 4 | 4781 |
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. 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. |
|
| Radius Range | All Candidates | Insolation between 0.32 and 1.78 |
|---|---|---|
| R ≤ 1.25 R_Earth | 941 | 23 |
| 1.25 < R ≤ 2 R_Earth | 1364 | 81 |
| 2 < R ≤ 6 R_Earth | 1839 | 156 |
| 6 < R ≤ 15 R_Earth | 314 | 18 |
| 15 R_Earth < R | 154 | 10 |
| Confirmed Planets Discovered by K2 1 | 548 |
| K2 Candidates Yet To Be Confirmed | 975 |
| K2 Campaign 9 Microlensing Events | |
|
1 This is the number of planets that were discovered utilizing Kepler/K2 observations. |
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