List of exoplanets discovered in 2021

This list of exoplanets 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	5720.0±50.0	[1][2]
NGTS-14Ab	0.092±0.012	0.444±0.030	3.5357173±0.0000069	0.0403±0.0071	1143±139	transit	1060	0.898±0.035	5187±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	4775±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	1605±30	transit	2150	1.30^+0.11 −0.18	5819±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	1586^+52 −40	transit	582	1.311^+0.066 −0.075	6250^+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	1749^+26 −30	transit	1115	1.536^+0.069 −0.076	6460^+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	1679^+35 −34	transit	653	1.464^+0.076 −0.079	6274±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	5595^+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	1619^+24 −23	transit	1096	1.517^+0.053 −0.049	5948^+87 −89	[6]
OGLE-2019-BLG-0960Lb	0.0071±0.0027			1.75±0.55		microlensing	2900±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	1371±14	transit	346.5±2.3	0.99±0.08	5730	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	5730	Host star also known as TOI-755[8]
KOI-5Ab	0.179	0.63	5			transit	1870±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	1040^+22 −21	transit	205.16±0.03	0.650^+0.027 −0.029	4316±70	[11]
TOI-178c	0.015^+0.0017 −0.0021	0.149^+0.01 −0.008	3.238450^+0.000020 −0.000019	0.0370±0.0011	873±18	transit	205.16±0.03	0.650^+0.027 −0.029	4316±70	[11]
TOI-178d	0.0094^+0.0025 −0.0032	0.229±0.006	6.557700±0.000016	0.0592±0.0018	690±14	transit	205.16±0.03	0.650^+0.027 −0.029	4316±70	[11]
TOI-178e	0.0121^+0.0039 −0.0029	0.197^+0.007 −0.008	9.961881±0.000042	0.0783^+0.0023 −0.0024	600±12	transit	205.16±0.03	0.650^+0.027 −0.029	4316±70	[11]
TOI-178f	0.0242^+0.0052 −0.0047	0.204±0.009	15.231915^+0.000115 −0.000095	0.1039±0.0031	521±11	transit	205.16±0.03	0.650^+0.027 −0.029	4316±70	[11]
TOI-178g	0.0123^+0.0041 −0.0050	0.256^+0.012 −0.011	20.70950^+0.00014 −0.00011	0.1275^+0.0038 −0.0039	470±10	transit	205.16±0.03	0.650^+0.027 −0.029	4316±70	[11]
HD 183579 b	0.0620^+0.0126 −0.0123	0.317^+0.013 −0.011	17.471278^+0.000058 −0.000060	0.1334^+0.0062 −0.0061	769^+17 −13	transit	186.1±0.8	1.031^+0.025 −0.026	5788±44	Host star also known as TOI-1055[12]
KMT-2019-BLG-0371b	7.70^+11.34 −3.90			0.79^+0.14 −0.16		microlensing	23000^+3000 −4000	0.09^+0.14 −0.05		Multiple solutions for orbital separation[13]
HD 5278 b	0.0245^+0.0047 −0.0044	0.219±0.004	14.339156^+0.000049 −0.000047	0.1202±0.0013	943±13	transit	183.1±2.7	1.126^+0.036 −0.035	6203±64	Host star also known as TOI-130[14]
HD 5278 c	0.0579^+0.0057 −0.0060		0.2416±0.0027	0.1202±0.0013	943±13	radial vel.	183.1±2.7	1.126^+0.036 −0.035	6203±64	Host star also known as TOI-130[14]
KMT-2018-BLG-1025Lb	0.0191^+0.0258 −0.0104			1.305^+0.194 −0.227		microlensing	22000±3000	0.219^+0.297 −0.120		Multiple solutions for orbital parameters[15]
Gliese 1151b	0.0079±0.0016		2.02	0.01735^+0.00065 −0.00070		radial vel.	26.23±0.01	0.154	3143±26	[16]
TOI-558b	3.61±0.15	1.086^+0.041 −0.038	14.574071±0.000026	0.1291^+0.0020 −0.0021	1061^+13 −12	transit	1312±17	1.349^+0.064 −0.065	6466^+95 −93	[17]
TOI-559b	6.01^+0.24 −0.23	1.091^+0.028 −0.025	6.9839095±0.0000051	0.0723±0.0013	1180^+18 −16	transit	761±7	1.026±0.057	5925^+85 −76	[17]
HD 13808 b	0.0346		14.2	0.11		radial vel.	92.2	0.771±0.022	5035±50	Candidate since 2011, confirmed in 2021[18]
HD 13808 c	0.0315		53.8	0.26		radial vel.	92.2	0.771±0.022	5035±50	Candidate since 2011, confirmed in 2021[18]

Specific exoplanet lists

• Lists of exoplanets
• List of exoplanets discovered before 2000 (30)
• List of exoplanets discovered between 2000–2009 (384)
• List of exoplanets discovered in 2010 (101)
• List of exoplanets discovered in 2011 (142)
• List of exoplanets discovered in 2012 (143)
• List of exoplanets discovered in 2013 (139)
• List of exoplanets discovered in 2014 (865)
• List of exoplanets discovered in 2015 (163)
• List of exoplanets discovered in 2016 (1511)
• List of exoplanets discovered in 2017 (148)
• List of exoplanets discovered in 2018 (311)
• List of exoplanets discovered in 2019 (202)
• List of exoplanets discovered in 2020 (261)
• List of exoplanets discovered in 2021 (29)
• List of potentially habitable exoplanets
• List of proper names of exoplanets
• List of multiplanetary systems
• List of exoplanet firsts
• List of exoplanet extremes
• List of exoplanets discovered using the Kepler space telescope
• List of exoplanets observed during Kepler's K2 mission
• List of extrasolar candidates for liquid water
• List of nearest exoplanets
• List of nearest terrestrial exoplanet candidates
• List of transiting exoplanets

References

1. "HD 108236 f". exoplanet.eu. Retrieved 4 January 2021.
2. CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii
3. NGTS-14Ab: a Neptune-sized transiting planet in the desert, 2021, arXiv:2101.01470
4. TOI-1259Ab – a gas giant planet with 2.7% deep transits and a bound white dwarf companion, 2021, arXiv:2101.02707
5. NGTS-13b: A hot 4.8 Jupiter-mass planet transiting a subgiant star, 2021, arXiv:2101.04245
6. TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full Frame Images, 2021, arXiv:2101.01726
7. OGLE-2019-BLG-0960Lb: The Smallest Microlensing Planet, 2021, arXiv:2101.04696
8. A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113, 2021, arXiv:2101.04745
9. ASSESSING THE EFFECT OF STELLAR COMPANIONS FROM HIGH-RESOLUTION IMAGING OF Kepler OBJECTS OF INTEREST, 2017, arXiv:1701.06577
10. AT LAST! CONFIRMATION OF KEPLER'S SECOND PLANETARY CANDIDATE
11. Six transiting planets and a chain of Laplace resonances in TOI-178, 2021, arXiv:2101.09260
12. VALIDATION OF HD 183579b USING ARCHIVAL RADIAL VELOCITIES: A WARM-NEPTUNE ORBITING A BRIGHT SOLAR ANALOG, 2021, arXiv:2101.12137
13. KMT-2019-BLG-0371 and the Limits of Bayesian Analysis, 2021, arXiv:2101.12206
14. A sub-Neptune and a non-transiting Neptune-mass companion unveiled by ESPRESSO around the bright late-F dwarf HD 5278 (TOI-130), 2021, arXiv:2101.12300
15. KMT-2018-BLG-1025Lb: microlensing super-Earth planet orbiting a low-mass star, 2021, arXiv:2102.01890 line feed character in |title= at position 64 (help)
16. The Habitable-zone Planet Finder Detects a Terrestrial-mass Planet Candidate Closely Orbiting Gliese 1151: The Likely Source of Coherent Low-frequency Radio Emission from an Inactive Star, 2021, arXiv:2102.02233
17. Two Massive Jupiters in Eccentric Orbits from the TESS Full Frame Images, 2021, arXiv:2102.02222
18. The HARPS search for southern extra-solar planets XLV. Two Neptune mass planets orbiting HD 13808: a study of stellar activity modelling’s impact on planet detection, 2021, arXiv:2102.03387