W. M. Keck Observatory Exoplanet Catalogue — 193 Confirmed…

193 confirmed exoplanets have been identified for the W. M. Keck Observatory facility. First confirmed in 1998; most recent in 2026.

Median radius

13.30 R⊕

Median mass

483.10 M⊕

Median distance

210.81 ly

Median ESI

0.35

Discovery Timeline

319985542001871320058882008161422201133122014412220184232021463202423

Composition Breakdown

Gas Giant

164

85.0%

Neptune-like

12

6.2%

Unclassified

9

4.7%

Sub-Neptune

6

3.1%

Super-Earth

2

1.0%

Host Spectral Class Mix

G-type yellow (Sun-like)

106

K-type orange

56

M-type red dwarf

17

F-type yellow-white

10

A-type white

2

L-type ultra-cool dwarf

1

T-type brown dwarf

1

Most Earth-like in this Cohort

ESI 0.810

HD 156668 b

Super-Earth · 1.87 R⊕ · 79.4 ly

ESI 0.775

GJ 251 b

Super-Earth · 1.79 R⊕ · 18.2 ly

ESI 0.720

GJ 414 A b

Sub-Neptune · 2.63 R⊕ · 38.8 ly

ESI 0.716

HD 1461 b

Sub-Neptune · 2.42 R⊕ · 76.5 ly

ESI 0.702

GJ 876 d

Sub-Neptune · 2.51 R⊕ · 15.2 ly

ESI 0.550

GJ 876 e

Sub-Neptune · 3.92 R⊕ · 15.2 ly

Cohort Extremes

Closest to Earth

GJ 876 d

15.2 ly

Largest radius

HD 209458 b

15.58 R⊕

Most massive

HD 125390 b

8,646.2 M⊕

Hottest equilibrium

2MASS J01225093-2439505 b

1,600 K

Full Catalogue

Planet Host Type Year Radius (R⊕) Mass (M⊕) Distance (ly) ESI
HD 156668 b HD 156668 Super-Earth 2010 1.87 4.15 79.4 0.810
GJ 251 b GJ 251 Super-Earth 2020 1.79 3.85 18.2 0.775
GJ 414 A b GJ 414 A Sub-Neptune 2021 2.63 7.60 38.8 0.720
HD 1461 b HD 1461 Sub-Neptune 2010 2.42 6.44 76.5 0.716
GJ 876 d GJ 876 Sub-Neptune 2005 2.51 6.83 15.2 0.702
GJ 876 e GJ 876 Sub-Neptune 2010 3.92 14.60 15.2 0.550
Kepler-100 e Kepler-100 Neptune-like 2023 5.27 24.14 993.6 0.461
HD 11964 c HD 11964 Neptune-like 2008 5.38 25.00 109.4 0.456
HD 99492 b HD 99492 Neptune-like 2004 5.44 25.50 59.4 0.453
HD 190360 c HD 190360 Neptune-like 2005 5.44 25.43 52.2 0.452
TOI-1410 c TOI-1410 Neptune-like 2024 5.63 27.00 237.3 0.443
HD 10697 b HD 10697 Gas Giant 1999 12.80 1,825.29 108.0 0.437
HD 75784 c HD 75784 Gas Giant 2018 12.80 1,792.56 278.6 0.436
HD 99706 c HD 99706 Gas Giant 2018 12.80 1,808.45 478.1 0.436
HD 148164 c HD 148164 Gas Giant 2018 12.80 1,640.00 251.8 0.433
HD 24040 b HD 24040 Gas Giant 2006 12.90 1,589.14 152.1 0.429
HD 11506 b HD 11506 Gas Giant 2007 12.90 1,551.00 167.2 0.428
HD 55696 b HD 55696 Gas Giant 2018 12.90 1,357.13 254.3 0.422
HD 168443 b HD 168443 Gas Giant 1998 12.60 2,424.40 129.2 0.420
HD 5891 b HD 5891 Gas Giant 2011 12.60 2,425.04 924.7 0.420
HD 49674 b HD 49674 Neptune-like 2002 6.20 31.78 140.4 0.417
HAT-P-44 c HAT-P-44 Gas Giant 2014 13.00 1,271.30 1,134.5 0.416
HIP 14810 b HIP 14810 Gas Giant 2005 13.00 1,239.54 164.6 0.415
HIP 41378 g HIP 41378 Sub-Neptune 2025 2.54 7.00 346.7 0.415
HD 128311 c HD 128311 Gas Giant 2005 13.00 1,204.26 53.3 0.413
HD 178911 B b HD 178911 B Gas Giant 2001 12.60 2,552.17 133.6 0.413
HD 102329 b HD 102329 Gas Giant 2011 12.60 2,593.49 708.1 0.411
Kepler-129 d Kepler-129 Gas Giant 2021 12.60 2,637.98 1,333.5 0.409
HD 222582 b HD 222582 Gas Giant 1999 12.60 2,660.24 137.5 0.408
HD 183263 b HD 183263 Gas Giant 2004 13.10 1,103.18 176.8 0.407
HD 95089 c HD 95089 Gas Giant 2018 13.10 1,096.51 446.7 0.406
HAT-P-17 c HAT-P-17 Gas Giant 2010 13.10 1,080.60 301.3 0.405
HD 18742 b HD 18742 Gas Giant 2011 13.10 1,080.62 530.6 0.405
KOINTREAU-3 b ISO-Oph 96 Gas Giant 2026 13.10 1,080.62 458.5 0.405
HD 13167 b HD 13167 Gas Giant 2018 13.10 1,052.02 485.8 0.404
HD 18015 b HD 18015 Gas Giant 2018 13.10 1,048.83 403.8 0.403
HD 142245 b HD 142245 Gas Giant 2011 13.10 975.74 317.1 0.400
Kepler-88 d KOI-142 Gas Giant 2020 13.10 965.15 1,229.2 0.399
14 Her b 14 Her Gas Giant 2002 12.50 2,828.67 58.5 0.398
CFBDSIR J145829+101343 b CFBDSIR J145829+101343 Gas Giant 2011 12.40 3,337.10 75.3 0.398
HD 125612 b HD 125612 Gas Giant 2007 13.20 945.22 187.9 0.395
HD 72659 b HD 72659 Gas Giant 2002 13.20 949.67 169.3 0.395
HD 183263 c HD 183263 Gas Giant 2008 12.50 2,958.98 176.8 0.393
HD 187123 c HD 187123 Gas Giant 2008 13.20 912.17 149.9 0.393
HD 13931 b HD 13931 Gas Giant 2009 13.20 889.92 154.6 0.392
HAT-P-13 c HAT-P-13 Gas Giant 2009 12.30 4,538.42 805.0 0.391
HD 1502 b HD 1502 Gas Giant 2011 13.20 874.03 622.8 0.391
HAT-P-11 c HAT-P-11 Gas Giant 2018 13.20 851.78 123.2 0.389
HD 156279 c HD 156279 Gas Giant 2018 12.50 3,098.83 118.1 0.387
HD 181342 b HD 181342 Gas Giant 2009 13.20 807.29 392.7 0.386
HD 75898 b HD 75898 Gas Giant 2007 13.20 810.46 254.6 0.386
Kepler-94 c Kepler-94 Gas Giant 2014 12.50 3,126.00 625.9 0.386
GJ 317 b GJ 317 Gas Giant 2007 13.30 794.50 49.6 0.382
HD 108863 b HD 108863 Gas Giant 2011 13.30 767.24 537.3 0.380
HD 212771 b HD 212771 Gas Giant 2009 13.30 759.61 362.5 0.379
HD 82886 b HD 82886 Gas Giant 2011 13.30 740.54 414.4 0.378
HD 98736 b HD 98736 Gas Giant 2018 13.30 740.54 105.8 0.378
HD 97658 b HD 97658 Sub-Neptune 2010 2.12 8.30 70.3 0.377
HD 4203 b HD 4203 Gas Giant 2001 13.30 708.76 265.4 0.375
HD 163607 c HD 163607 Gas Giant 2010 13.30 699.54 221.1 0.374
HD 180053 b HD 180053 Gas Giant 2018 13.30 697.32 447.0 0.374
KOINTREAU-1 b XEST 17-036 Gas Giant 2026 12.40 3,368.98 517.3 0.374
HD 4203 c HD 4203 Gas Giant 2014 13.30 689.66 265.4 0.373
HD 136418 b HD 136418 Gas Giant 2009 13.30 680.16 343.0 0.372
HD 66428 b HD 66428 Gas Giant 2005 12.40 3,478.95 173.8 0.371
HD 117207 b HD 117207 Gas Giant 2004 13.40 669.35 105.5 0.369
TOI-1386 c TOI-1386 Gas Giant 2024 10.30 75.20 479.0 0.369
HIP 79431 b HIP 79431 Gas Giant 2009 13.40 667.42 47.4 0.368
HD 145934 b HD 145934 Gas Giant 2015 13.40 658.54 743.2 0.367
HD 206610 b HD 206610 Gas Giant 2009 13.40 647.10 480.1 0.367
HD 32963 b HD 32963 Gas Giant 2015 13.40 657.90 124.2 0.367
Kepler-48 e Kepler-48 Gas Giant 2014 13.40 657.00 1,000.4 0.367
HD 106270 b HD 106270 Gas Giant 2011 12.40 3,623.24 306.0 0.366
K2-73 c K2-73 Gas Giant 2025 13.00 1,142.00 878.0 0.366
HD 98219 b HD 98219 Gas Giant 2011 13.40 624.22 370.9 0.364
HD 4313 b HD 4313 Gas Giant 2009 13.40 612.46 444.6 0.363
HD 114783 c HD 114783 Gas Giant 2018 13.40 603.87 68.7 0.362
HD 152581 b HD 152581 Gas Giant 2011 13.40 594.02 540.6 0.361
HD 131496 b HD 131496 Gas Giant 2011 13.40 572.09 430.0 0.359
HD 177830 c HD 177830 Neptune-like 2010 7.87 47.67 204.7 0.358
HD 128311 b HD 128311 Gas Giant 2002 13.50 562.24 53.3 0.355
HD 45350 b HD 45350 Gas Giant 2004 13.50 568.89 152.9 0.355
HD 72490 b HD 72490 Gas Giant 2018 13.50 561.92 412.1 0.355
2MASS J22362452+4751425 b 2MASS J22362452+4751425 Gas Giant 2016 12.30 3,972.88 226.9 0.352
HD 177830 b HD 177830 Gas Giant 1999 13.50 537.13 204.7 0.352
HD 180902 b HD 180902 Gas Giant 2009 13.50 535.54 341.1 0.352
Kepler-407 c Kepler-407 Gas Giant 2014 12.30 4,000.00 1,103.6 0.351
HD 4917 b HD 4917 Gas Giant 2018 13.50 513.30 666.3 0.349
HD 50499 b HD 50499 Gas Giant 2005 13.50 519.97 151.0 0.349
HD 134987 b HD 134987 Gas Giant 1999 13.50 511.71 85.4 0.348
HD 30856 b HD 30856 Gas Giant 2011 13.50 491.68 427.9 0.346
HD 158038 b HD 158038 Gas Giant 2011 13.50 486.28 309.4 0.345
HD 28678 b HD 28678 Gas Giant 2011 13.50 490.09 619.4 0.345
HD 5319 b HD 5319 Gas Giant 2007 13.50 494.54 396.0 0.345
HD 102329 c HD 102329 Gas Giant 2018 13.50 483.10 708.1 0.344
HD 188015 b HD 188015 Gas Giant 2004 13.60 476.72 165.3 0.341
HD 10442 b HD 10442 Gas Giant 2014 13.60 472.61 441.5 0.340
HD 86081 b HD 86081 Gas Giant 2006 13.60 470.39 339.0 0.340
GJ 317 c GJ 317 Gas Giant 2018 13.60 454.49 49.6 0.338
HD 108874 b HD 108874 Gas Giant 2002 13.60 451.32 194.1 0.337
HD 116029 b HD 116029 Gas Giant 2011 13.60 444.96 402.0 0.336
HD 52265 b HD 52265 Gas Giant 2000 13.70 384.57 97.8 0.332
HIP 14810 c HIP 14810 Gas Giant 2006 13.60 416.36 164.6 0.332
HD 210277 b HD 210277 Gas Giant 1998 13.60 410.00 69.5 0.331
HD 116029 c HD 116029 Gas Giant 2018 13.70 403.64 402.0 0.327
HD 33142 b HD 33142 Gas Giant 2011 13.70 400.46 395.9 0.327
HD 94834 b HD 94834 Gas Giant 2018 13.70 400.47 320.2 0.327
HD 95089 b HD 95089 Gas Giant 2009 13.70 400.47 446.7 0.327
HD 96063 b HD 96063 Gas Giant 2011 13.70 403.64 456.8 0.327
HD 148164 b HD 148164 Gas Giant 2018 13.70 390.93 251.8 0.325
HD 99706 b HD 99706 Gas Giant 2011 13.70 390.93 478.1 0.325
KOINTREAU-4 b 2MASS J16262785-2625152 Gas Giant 2026 12.20 4,862.77 474.3 0.325
Kepler-139 e Kepler-139 Gas Giant 2023 13.70 378.00 1,275.4 0.323
HD 154345 b HD 154345 Gas Giant 2006 13.70 376.94 59.6 0.322
HD 218566 b HD 218566 Neptune-like 2010 9.32 63.57 94.0 0.320
ROXs 12 b ROXs 12 Gas Giant 2013 12.20 5,085.00 445.7 0.320
HD 231701 b HD 231701 Gas Giant 2007 13.70 359.15 355.1 0.319
GJ 436 b GJ 436 Neptune-like 2004 4.17 22.10 31.8 0.318
HD 14787 b HD 14787 Gas Giant 2018 13.70 356.29 388.6 0.318
HD 73534 b HD 73534 Gas Giant 2008 13.70 353.43 271.8 0.318
HD 114783 b HD 114783 Gas Giant 2001 13.70 349.60 68.7 0.317
HD 107148 b HD 107148 Neptune-like 2005 9.60 66.74 161.2 0.314
HD 5319 c HD 5319 Gas Giant 2014 13.80 334.67 396.0 0.312
HD 168443 c HD 168443 Gas Giant 2000 12.20 5,500.34 129.2 0.311
HD 88133 b HD 88133 Gas Giant 2004 13.80 324.19 240.1 0.310
GJ 849 c GJ 849 Gas Giant 2014 13.80 314.65 28.7 0.308
HD 108874 c HD 108874 Gas Giant 2005 13.80 314.64 194.1 0.308
HD 75784 b HD 75784 Gas Giant 2014 13.80 317.83 278.6 0.308
HD 102956 b HD 102956 Gas Giant 2010 13.80 305.12 397.6 0.306
HD 46375 b HD 46375 Gas Giant 2000 10.00 71.80 96.4 0.306
Kepler-25 d Kepler-25 Gas Giant 2014 10.00 71.90 793.4 0.306
GJ 179 b GJ 179 Gas Giant 2009 13.80 301.94 40.3 0.305
HD 10647 b HD 10647 Gas Giant 2006 13.80 298.75 56.5 0.304
Kepler-48 f Kepler-48 Gas Giant 2023 13.80 298.58 1,000.4 0.304
TOI-1694 c TOI-1694 Gas Giant 2023 13.80 297.00 406.7 0.304
GJ 849 b GJ 849 Gas Giant 2006 13.90 283.82 28.7 0.298
HD 33142 c HD 33142 Gas Giant 2018 13.90 282.87 395.9 0.298
Kepler-68 d Kepler-68 Gas Giant 2013 13.90 267.00 470.2 0.294
HD 114729 b HD 114729 Gas Giant 2002 13.90 262.21 123.3 0.293
HD 34445 b HD 34445 Gas Giant 2009 13.90 260.62 150.3 0.293
HD 4208 b HD 4208 Gas Giant 2001 13.90 257.44 111.5 0.292
Kepler-65 e Kepler-65 Gas Giant 2019 13.90 260.00 990.6 0.292
GJ 649 b GJ 649 Gas Giant 2009 10.80 82.00 33.9 0.291
HD 163607 b HD 163607 Gas Giant 2010 13.90 249.05 221.1 0.290
HD 16141 b HD 16141 Gas Giant 2000 10.90 82.64 123.2 0.289
HD 191939 e HD 191939 Gas Giant 2022 13.00 112.20 174.8 0.287
HD 109749 b HD 109749 Gas Giant 2005 11.10 85.81 205.7 0.286
HD 207832 c HD 207832 Gas Giant 2012 14.00 232.02 192.2 0.283
HD 96167 b HD 96167 Gas Giant 2009 14.00 227.88 278.2 0.281
HD 224693 b HD 224693 Gas Giant 2006 14.00 222.48 305.0 0.280
HD 37124 d HD 37124 Gas Giant 2005 14.00 221.21 103.3 0.279
HD 37124 b HD 37124 Gas Giant 2002 14.00 214.54 103.3 0.278
HD 211810 b HD 211810 Gas Giant 2018 14.00 212.95 210.8 0.277
HD 170469 b HD 170469 Gas Giant 2007 14.10 209.77 196.3 0.274
HD 37124 c HD 37124 Gas Giant 2002 14.10 207.23 103.3 0.273
TOI-1272 c TOI-1272 Neptune-like 2022 4.95 21.70 448.7 0.273
GJ 1148 b GJ 1148 Gas Giant 2010 11.90 96.70 35.9 0.272
HD 11964 b HD 11964 Gas Giant 2005 14.10 198.00 109.4 0.270
HD 31253 b HD 31253 Gas Giant 2010 14.10 197.05 189.6 0.270
HD 175541 b HD 175541 Gas Giant 2007 14.10 190.06 422.7 0.268
TOI-1669 b TOI-1669 Gas Giant 2023 14.10 191.00 362.9 0.268
BD-10 3166 b BD-10 3166 Gas Giant 2000 14.10 187.52 275.3 0.267
HIP 14810 d HIP 14810 Gas Giant 2009 14.10 187.52 164.6 0.267
HD 33283 b HD 33283 Gas Giant 2006 12.50 104.57 293.1 0.263
HD 126614 b HD 126614 Gas Giant 2009 12.70 107.74 238.4 0.261
HD 207832 b HD 207832 Gas Giant 2012 14.20 177.98 192.2 0.261
HD 187123 b HD 187123 Gas Giant 1998 14.20 166.22 149.9 0.257
HIP 57274 d HIP 57274 Gas Giant 2011 14.20 167.40 84.3 0.257
HD 125390 b HD 125390 Gas Giant 2019 11.90 8,646.20 501.1 0.255
PZ Tel b PZ Tel Gas Giant 2023 11.90 8,581.37 153.5 0.255
WISEP J121756.91+162640.2 A b WISEP J121756.91+162640.2 A Gas Giant 2012 10.47 6,992.00 32.9 0.250
HD 191939 f HD 191939 Gas Giant 2022 13.20 915.35 174.8 0.247
TOI-1294 c TOI-1294 Gas Giant 2024 14.30 147.00 1,085.0 0.247
HD 164509 b HD 164509 Gas Giant 2010 14.30 140.80 173.2 0.245
HD 11506 c HD 11506 Gas Giant 2008 14.00 127.13 167.2 0.244
HD 99109 b HD 99109 Gas Giant 2005 14.30 139.85 178.7 0.244
Kepler-1656 c Kepler-1656 Gas Giant 2022 14.00 126.40 606.2 0.244
HIP 57274 c HIP 57274 Gas Giant 2011 14.20 130.00 84.3 0.241
GJ 414 A c GJ 414 A Neptune-like 2021 8.40 53.83 38.8 0.222
HD 164922 b HD 164922 Gas Giant 2005 13.30 116.00 71.8 0.222
HR 8799 e HR 8799 Gas Giant 2010 13.11 3,178.30 134.5 0.139
HR 8799 d HR 8799 Gas Giant 2008 13.00 3,000.00 134.5 0.122
HD 209458 b HD 209458 Gas Giant 1999 15.58 232.02 157.5 0.077
2MASS J01225093-2439505 b 2MASS J01225093-2439505 Gas Giant 2013 11.21 7,786.50 110.3 0.068
HD 179079 b HD 179079 Unclassified 2008 — 4,195.33 227.4 —
HD 202696 b HD 202696 Unclassified 2019 — 634.39 615.0 —
HD 202696 c HD 202696 Unclassified 2019 — 592.44 615.0 —
HD 7924 b HD 7924 Unclassified 2008 — 2,058.26 55.4 —
HD 7924 c HD 7924 Unclassified 2015 — 1,762.68 55.4 —
HD 7924 d HD 7924 Unclassified 2015 — 1,568.17 55.4 —
HIP 57274 b HIP 57274 Unclassified 2011 — 3,359.45 84.3 —
Kepler-93 c Kepler-93 Unclassified 2014 — 954.00 312.8 —
Kepler-97 c Kepler-97 Unclassified 2014 — 344.00 1,307.6 —