This list of exoplanets8 discovered in 2021 is a list of confirmed exoplanets that were first observed in 2021. For exoplanets detected only by radial velocity, the listed value for mass is a lower limit. See Minimum mass for more information.
Name Mass (MJ) Radius (RJ) Period (days) Semi-major axis (AU) Temp. (K) Discovery method Distance (ly) Host star mass (M☉) Host star temp. (K) Remarks
HD 108236 f 0.17406+0.00482
−0.00437 29.54255±0.00069 0.1759±0.0037 transit 211 0.853±0.047 5,720.0±50.0 [1][2]
NGTS-14Ab 0.092±0.012 0.444±0.030 3.5357173±0.0000069 0.0403±0.0071 1,143±139 transit 1,060 0.898±0.035 5,187±11 [3]
TOI-1259Ab 0.441+0.049
−0.047 1.022+0.030
−0.037 3.4779780+0.0000019
−0.0000017 0.04070+0.00114
−0.00110 936 transit 385±1 0.68+0.1
−0.01 4,775±100 Also white dwarf on a wide orbit[4]
NGTS-13b 4.84±0.44 1.142±0.046 4.12 0.0549+0.0015
−0.0025 1,605±30 transit 2150 1.30+0.11
−0.18 5,819±73 [5]
TOI-628 b 6.33+0.29
−0.31 1.060+0.041
−0.034 3.4095675+0.0000070
−0.0000069 0.04860+0.00080
−0.00094 1,586+52
−40 transit 582 1.311+0.066
−0.075 6,250+220
−190 Host star also known as HD 288842[6]
TOI-640 b 0.88±0.16 1.771+0.060
−0.056 5.0037775±0.0000048 0.06608+0.00098
−0.0011 1,749+26
−30 transit 1,115 1.536+0.069
−0.076 6,460+130
−150 [6]
TOI-1333 A b 2.37±0.24 1.396+0.056
−0.054 4.720219±0.000011 0.0626+0.0011
−0.0012 1,679+35
−34 transit 653 1.464+0.076
−0.079 6,274±97 Host star also known as BD+47 3521A.[6]
TOI-1478 b 0.847+0.052
−0.048 1.061+0.040
−0.038 10.180249±0.000015 0.0903+0.0018
−0.0013 918±11 transit 498 0.946+0.059
−0.041 5,595+83
−81 [6]
TOI-1601 b 0.99±0.11 1.239+0.046
−0.039 5.331751±0.000011 0.06864+0.00079
−0.00075 1,619+24
−23 transit 1,096 1.517+0.053
−0.049 5,948+87
−89 [6]
OGLE-2019-BLG-0960Lb 0.0071±0.0027 1.75±0.55 microlensing 2,900±1000 0.45±0.15 Smallest planet discovered by microlensing[7]
HD 110113 b 0.0143±0.0020 0.183±0.011 2.541+0.0005
−0.001 0.035±0.001 1,371±14 transit 346.5±2.3 0.99±0.08 5,730 Radius gap planet, host star also known as TOI-755[8]
HD 110113 c 0.0330±0.0038 6.744+0.008
−0.009 0.068+0.001
−0.002 990±10 radial vel. 346.5±2.3 0.99±0.08 5,730 Host star also known as TOI-755.[8]
KOI-5Ab 0.179 0.63 5 transit 1,870±70 1.13 5861 Also called TOI-1241b.[9][10]
TOI-178b 0.0047+0.0012
−0.0013 0.102±0.006 1.914558±0.000018 0.02607±0.00078 1,040+22
−21 transit 205.16±0.03 0.650+0.027
−0.029 4,316±70 [11]
TOI-178c 0.015+0.0017
−0.0021 0.149+0.01
−0.008 3.238450
