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.
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|Discovery Method||Number of Planets|
|Transit timing variations||15|
|Eclipse timing variations||8|
|Pulsar timing variations||5|
|Pulsation timing variations||1|
|Orbital brightness modulations||6|
|Confirmed Planets with mass||586|
|Confirmed Planets with m sin i||567|
|Confirmed Planets with radius||1315|
|R ≤ 1.25 R_Earth||155|
|1.25 < R ≤ 2 R_Earth||317|
|2 < R ≤ 6 R_Earth||517|
|6 < R ≤ 15 R_Earth||248|
|15 R_Earth < R||78|
|M ≤ 3 M_Earth||29|
|3 < M ≤ 10 M_Earth||69|
|10 < M ≤ 30 M_Earth||58|
|30 < M ≤ 100 M_Earth||55|
|100 < M ≤ 300 M_Earth||133|
|300 M_Earth < M||242|
(mission and community)
|Candidates and Confirmed in Habitable Zone 1, 2
(180 K < Equilibrium (T) < 310 K) or
(0.25 < Insolation (Earth flux) < 2.2)
|Kepler Project Candidates 2||4696|
|Kepler Project Unconfirmed Candidates||3699|
|Total Candidates and Confirmed Planets3||4743|
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.
|Radius Range||All Candidates||Insolation between 0.32 and 1.78|
|R ≤ 1.25 R_Earth||977||18|
|1.25 < R ≤ 2 R_Earth||1313||53|
|2 < R ≤ 6 R_Earth||1580||117|
|6 < R ≤ 15 R_Earth||288||26|
|15 R_Earth < R||466||23|
|K2 Campaign 9 Microlensing Events||330|