This is the list of 9 extrasolar planets that were detected by timing –– 4 by pulsar timing and 5 by variable star timing, sorted by orbital periods. It works by much the radio emissions emitted from pulsars changed cause by the gravity of orbiting planets. Same thing works for variable stars, not by radio but light.

The most massive planet detected by timing is HW Virginis c

HW Virginis c

HW Virginis c is an extrasolar planet located approximately 590 light years away in the constellation of Virgo, orbiting the 11th magnitude eclipsing binary star HW Virginis. This planet is very massive, at least 8.47 times more than Jupiter. This is a long-period planet with an orbital revolution...

, which masses 8.97 M_J; the least massive planet is PSR B1257+12 b

PSR B1257+12 B

PSR B1257+12B is an extrasolar planet in the constellation of Virgo . PSR B1257+12B was the first planet ever discovered outside the Solar system, and is the second object known to be orbiting the pulsar PSR B1257+12, which it circles at a distance of 0.36 AU with an orbital period of...

, which masses 0.000085 M_J or 0.022 M_⊕. The longest period of any planets detected by timing is PSR B1620-26 b, which is 36525 days or 100 years; the shortest period is PSR B1257+12 b

PSR B1257+12 B

PSR B1257+12B is an extrasolar planet in the constellation of Virgo . PSR B1257+12B was the first planet ever discovered outside the Solar system, and is the second object known to be orbiting the pulsar PSR B1257+12, which it circles at a distance of 0.36 AU with an orbital period of...

, which is 25.262 days.

There are 5 members of the multi-planet systems, including three orbiting around PSR B1257+12

PSR B1257+12

PSR B1257+12, sometimes abbreviated as PSR 1257+12, is a pulsar located roughly 2000 light-years from the Sun. In 2007, it was confirmed that three extrasolar planets orbit the pulsar.- Pulsar :...

.

Yellow rows donate the members of the multi-planet system

Planet Extrasolar planet An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...	Mass Planetary mass Planetary mass is a measure of the mass of a planet. Within the Solar System, planets are usually measured in the astronomical system of units, where the unit of mass is the solar mass, the mass of the Sun...  (MJ Jupiter mass Jupiter mass , is the unit of mass equal to the total mass of the planet Jupiter . Jupiter mass is used to describe masses of the gas giants, such as the outer planets and extrasolar planets. It is also used in describing brown dwarfs.... )	Period Orbital period The orbital period is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.There are several kinds of...  (d Day A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun... )	Semi-major axis Semi-major axis The major axis of an ellipse is its longest diameter, a line that runs through the centre and both foci, its ends being at the widest points of the shape...  (AU Astronomical unit An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance.... )	Eccentricity Orbital eccentricity The orbital eccentricity of an astronomical body is the amount by which its orbit deviates from a perfect circle, where 0 is perfectly circular, and 1.0 is a parabola, and no longer a closed orbit...	Inclination Inclination Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...  (°)	Year of discovery
PSR B1257+12 b PSR B1257+12 B PSR B1257+12B is an extrasolar planet in the constellation of Virgo . PSR B1257+12B was the first planet ever discovered outside the Solar system, and is the second object known to be orbiting the pulsar PSR B1257+12, which it circles at a distance of 0.36 AU with an orbital period of...	0.000085	25.262	0.190	0.0010	54.690	1994
PSR B1257+12 c PSR B1257+12 C PSR B1257+12C is an extrasolar planet approximately 980 light-years away in the constellation of Virgo . PSR B1257+12C was one of the first planets ever discovered outside the Solar system, and is currently the third object known to be orbiting the pulsar PSR B1257+12...	0.014	66.542	0.363	0.0188	52.593	1992
PSR B1257+12 d PSR B1257+12 D PSR B1257+12 D is a possible extrasolar dwarf planet approximately 980 light-years away in the constellation of Virgo. It is suspected that a dwarf planet is orbiting PSR B1257+12 at an average orbital distance of 2.6 AU with an orbital period of approximately 3.5 years.Originally, in 1996, a...	0.012	98.221	0.471	0.0252	47.102	1992
V391 Pegasi b V391 Pegasi b V391 Pegasi b, also known as HS 2201+2610 b, is an extrasolar planet orbiting the star V391 Pegasi approximately 4570 light-years away in the constellation of Pegasus. The planet was discovered by means of variable star timing, which measured anomalies in variability of the star caused by a planet...	3.216	1170.235	6.660	0.0033		2007
NN Serpentis d	3.077	2830.113	3.385	0.2010		2009
HW Virginis c HW Virginis c HW Virginis c is an extrasolar planet located approximately 590 light years away in the constellation of Virgo, orbiting the 11th magnitude eclipsing binary star HW Virginis. This planet is very massive, at least 8.47 times more than Jupiter. This is a long-period planet with an orbital revolution...	8.966	3321.179	4.403	0.3101		2008
NN Serpentis c	7.883	5662.218	5.375	0.0008		2009
DP Leonis Majoris b	6.149	10232.738	8.142	0.3944		2009
PSR B1620-26 b	3.046	36524.780	23.824	0.0643	55.232	1993