This is the list of 20

extrasolar planets An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, init ...

that were detected by timing –– 8 by

pulsar timing Any planet is an extremely faint light source compared to its parent star. For example, a star like the Sun is about a billion times as bright as the reflected light from any of the planets orbiting it. In addition to the intrinsic difficulty of ...

and 12 by

variable star timing Any planet is an extremely faint light source compared to its parent star. For example, a star like the Sun is about a billion times as bright as the reflected light from any of the planets orbiting it. In addition to the intrinsic difficulty ...

, sorted by orbital periods. It works by detecting the changes in radio emissions from pulsars caused by the gravity of orbiting planets. Same thing works for variable stars, not by radio but light.

Planets

The most massive planet detected by timing is HW Virginis b, which masses 19.2 M_J; the least massive planet is PSR B1257+12 b, which masses 0.00007 M_J or 0.022 M_🜨. The longest period of any planets detected by timing is

PSR B1620-26 b PSR may refer to: Organizations * Pacific School of Religion, Berkeley, California, US * Palestinian Center for Policy and Survey Research * Physicians for Social Responsibility, US ;Political parties: * Revolutionary Socialist Party (Portugal) ( ...

, which is 36525 days or 100 years; the shortest period is SDSS J1228+1040 b, which is 0.0857 days. There are 9 members of multi-planet systems, including three orbiting around

PSR B1257+12 PSR B1257+12, previously designated PSR 1257+12, alternatively designated PSR J1300+1240, is a millisecond pulsar located 2,300 light-years from the Sun in the constellation of Virgo, rotating at about 161 times per second (faster than ...

List

''Yellow rows donate the members of the multi-planet system''

External links

* * * * {{exoplanet Detected by timing