List of multiplanetary systems

Number of extrasolar planet discoveries per year through 2021. Colors indicate method of detection.

radial velocity   transit

timing   direct detection   microlensing

From the total of 3,090 stars known to have exoplanets (as of January 1, 2020), there are a total of 676 known multiplanetary systems,^[1] or stars with at least two confirmed planets, beyond the Solar System. This list includes systems with at least three confirmed planets or two confirmed planets where additional candidates have been proposed. The stars with the most confirmed planets are Sol (the Solar System's star, also referred to as the Sun) and Kepler-90 with 8 confirmed planets each, followed by TRAPPIST-1 with 7 planets.

The table below contains information about the coordinates, spectral and physical properties, and the number of confirmed (unconfirmed) planets for systems with at least 2 planets and 1 not confirmed. The two most important stellar properties are mass and metallicity because they determine how these planetary systems form. Systems with higher mass and metallicity tend to have more planets and more massive planets. However, although low metallicity stars tend to have fewer massive planets, particularly hot-Jupiters, they also tend to have a larger number of close-in planets, orbiting at less than 1 AU.^[2]

Multiplanetary systems

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Stars orbited by both planets and brown dwarfs

Stars orbited by objects on both sides of the 13 Jupiter mass dividing line.

• 54 Piscium (HD 3651)
• HD 168443
• Gliese 229 A
• Epsilon Indi
• HD 82943
• Pi Mensae

See also

References

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