Astronomy:List of exoplanets discovered before 2000

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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,[2] the planet Gamma Cephei Ab was not confirmed until 2003,[3] 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 Mass (MJ) Radius (RJ) Period (days) Semi-major axis (AU) Temp. (K) Discovery method Disc. Year Distance (ly) Host star mass (M☉) 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 [4] 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

Bodies previously considered as candidates

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.[5]

Specific exoplanet lists

References

  1. ↑ "NASA Exoplanet Archive". https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars. 
  2. ↑ Campbell, Bruce; Walker, G. A. H.; Yang, S. (1988). "A Search for Substellar Companions to Solar-type Stars". The Astrophysical Journal 331: 902. doi:10.1086/166608. Bibcode: 1988ApJ...331..902C. 
  3. ↑ Hatzes, Artie P. et al. (2003). "A Planetary Companion to Gamma Cephei A". The Astrophysical Journal 599 (2): 1383–1394. doi:10.1086/379281. Bibcode: 2003ApJ...599.1383H. 
  4. ↑ "The planet-host star Iota Horologii". https://www.eso.org/public/images/eso0809a/. 
  5. ↑ Kiefer, Flavien (17 October 2019). "Determining the mass of the planetary candidate HD 114762 b using Gaia". Astronomy & Astrophysics 632: L9. doi:10.1051/0004-6361/201936942. Bibcode: 2019A&A...632L...9K. 



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