This is a list of exoplanets discovered before 2000.[1]
For exoplanets detected only by radial velocity, the mass value is actually a lower limit. (See Minimum mass for more information.)
While the existence of a substellar companion to Gamma Cephei was suspected since 1988, the planet Gamma Cephei Ab was not confirmed until 2003, and that is listed as its discovery year in exoplanet databases. Thus, this planet is in the List of exoplanets discovered between 2000–2009.
| Name !data-sort-type="number" | Mass !data-sort-type="number" | Radius !data-sort-type="number" | Period (days) !data-sort-type="number" | Semi-major axis (AU) !data-sort-type="number" | Temp. (K) !Discovery method | data-sort-type="number" | Disc. Year !data-sort-type="number" | Distance (ly) !data-sort-type="number" | Host star mass !data-sort-type="number" | Host star temp. (K) !Remarks | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 16 Cygni Bb | 2.38 | 799.5 | 1.66 | radial vel. | 1996 | 68.99 | 1.04 | 5750 | ||||
| 23 Librae b | 1.61 | 258.18 | 0.81 | radial vel. | 1999 | 85.46 | 1.07 | 5736 | ||||
| 47 Ursae Majoris b | 2.53 | 1078 | 2.1 | radial vel. | 1996 | 45.02 | 1.08 | 5892 | Proper name Taphao Thong | |||
| 51 Pegasi b | 0.46 | 4.230785 | 0.0527 | radial vel. | 1995 | 50.45 | 1.12 | 5793 | Proper name Dimidium. First exoplanet discovered orbiting a main sequence star. | |||
| 55 Cancri b | 0.8306 | 14.65152 | 0.115227 | 700 | radial vel. | 1996 | 41.06 | 0.905 | 5196 | Proper name Galileo | ||
| 70 Virginis b | 7.49 | 116.688 | 0.481 | radial vel. | 1996 | 58.42 | 1.09 | 5495 | ||||
| 109 Piscium b | 6.383 | 1075.69 | 2.14 | radial vel. | 1999 | 108.1 | 1.11 | 5600 | ||||
| Gliese 86 b | 4.42 | 15.76491 | 0.11 | radial vel. | 1999 | 35.18 | 0.83 | 5182 | ||||
| Gliese 876 b | 2.2756 | 61.1166 | 0.208317 | radial vel. | 1998 | 15.25 | 0.32 | 3129 | ||||
| HD 75289 b | 0.49 | 3.50927 | 0.05 | 1260 | radial vel. | 1999 | 95.05 | 1.29 | 6117 | |||
| HD 89744 b | 8.35 | 256.78 | 0.917 | radial vel. | 1999 | 126.2 | 1.86 | 6291 | ||||
| HD 130322 b | 1.15 | 10.70871 | 0.0925 | 720 | radial vel. | 1999 | 104.1 | 0.92 | 5387 | Proper name Eiger | ||
| HD 168443 b | 7.659 | 58.11247 | 0.2931 | radial vel. | 1998 | 129.4 | 0.995 | 5491 | ||||
| HD 177830 b | 1.69 | 410.1 | 1.14 | radial vel. | 1999 | 205.1 | 1.70 | 4901 | ||||
| HD 187123 b | 0.523 | 3.0965828 | 0.0426 | radial vel. | 1998 | 150.1 | 1.0 | 5830 | ||||
| HD 192263 b | 0.56 | 24.3556 | 0.15 | 486 | radial vel. | 1999 | 64.08 | 0.66 | 4976 | Proper name Beirut | ||
| HD 195019 b | 3.98 | 18.20132 | 0.14 | radial vel. | 1998 | 123 | 1.21 | 5751 | ||||
| HD 209458 b | 0.73 | 1.39 | 3.52474859 | 0.04707 | 1459 | radial vel. | 1999 | 157.8 | 1.23 | 6091 | Informally named Osiris | |
| HD 210277 b | 1.29 | 442.19 | 1.13 | radial vel. | 1998 | 69.51 | 1.01 | 5538 | ||||
| HD 217107 b | 1.30 | 7.12682 | 0.08 | radial vel. | 1998 | 65.47 | 1.00 | 5622 | ||||
| HD 222582 b | 8.37 | ~1.12 | 572.38 | 1.34 | radial vel. | 1999 | 137.7 | 1.12 | 5790 | |||
| Iota Horologii b | 2.27 | 302.8 | 0.92 | radial vel. | 1999 | 56.51 | 1.25 [2] | 6167 | ||||
| PSR B1257+12 b | 0.000063 | 25.262 | 0.19 | timing | 1994 | ~2000 | 1.4 | Proper name Draugr. Least massive exoplanet known. | ||||
| PSR B1257+12 c | 0.014 | 66.5419 | 0.36 | timing | 1992 | ~2000 | 1.4 | Proper name Poltergeist | ||||
| PSR B1257+12 d | 0.012 | 0.13 | 98.2114 | 0.46 | timing | 1992 | ~2000 | 1.4 | Proper name Phobetor | |||
| PSR B1620-26 b | 2.5 | 23.0 | timing | 1993 | 12400 | 1.35 | ||||||
| Rho Coronae Borealis b | 1.045 | 39.8458 | 0.2196 | 614 | radial vel. | 1997 | 57.0 | 0.889 | 5627 | |||
| Tau Boötis b | 5.95 | 3.3124568 | 0.049 | radial vel. | 1996 | 51.07 | 1.34 | 6400 | ||||
| Upsilon Andromedae b | 0.6876 | ~1.8 | 4.617033 | 0.059222 | radial vel. | 1996 | 43.74 | 1.3 | 6183 | Proper name Saffar | ||
| Upsilon Andromedae c | 1.981 | 241.258 | 0.827774 | radial vel. | 1999 | 43.74 | 1.3 | 6183 | Proper name Samh | |||
| Upsilon Andromedae d | 4.132 | ~1.02 | 1276.46 | 2.51329 | radial vel. | 1999 | 43.74 | 1.3 | 6183 | Proper name Majriti |
HD 114762 b was once considered as the first discovered exoplanet. Found in 1989 by a team led by David Latham, it is now known to be a red dwarf star.