List of exoplanets discovered in 2018 explained

This List of exoplanets discovered in 2018 is a list of confirmed exoplanets that were first observed during 2018.^[1]

For exoplanets detected only by radial velocity, the listed value for mass is a lower limit. See Minimum mass for more information.

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)^[2] !Discovery method	data-sort-type="number"	Distance (ly) !data-sort-type="number"	Host star mass !data-sort-type="number"	Host star temp. (K) !Remarks	radial vel. FFFF00"	transit FF6CDA"	imaging 0099FF"	microlensing FF7519"	timing -->
24 Boötis b	0.91		30.3506	0.190		radial vel.	313.9	0.99	4893	^[3]
40 Eridani Ab	0.0266		42.378	0.2190		radial vel.	16.426	0.78	5072	^[4]
COROT-20c	17		1675	2.90		radial vel.	2819	1.14	6050	Brown dwarf (possibly)
DE Canum Venaticorum b	12		4098.1	5.75		timing	99.64	0.51		^[5]
Gamma Librae b	1.02		415.2	1.24		radial vel.	154.7	1.47	4822
Gamma Librae c	4.58		964.6	2.17		radial vel.	154.7	1.47	4822
Gliese 15 Ac	0.11		7600	5.4		radial vel.	11.6	0.38	3567	^[6]
Gliese 96 b	0.06186		73.94	0.291		radial vel.	38.929	0.60	3785
Gliese 143 b	0.09637	0.228	35.589	0.1932		transit	53.25	0.76
Gliese 1132 c	0.00831		8.929	0.0476	300	radial vel.	41.153	0.181	3270
Gliese 1265 b	0.023		3.6511	0.026		radial vel.	33.45	0.18	3236	Host star also known as LP 819-052
Gliese 3779 b	0.025		3.0232	0.026		radial vel.	44.84	0.27	3324	Host star also known as Ross 1020
HAT-P-11c	1.60		3407	4.13		radial vel.	123.31	0.809	4780	^[7]
HATS-39b	0.63	1.57	4.5776348	0.06007	1645	transit	2910	1.379	6572
HATS-40b	1.59	1.58	3.2642736	0.04997	2101	transit	4550	1.561	6460
	9.7	1.33	4.193649	0.0583	1710	transit	2457	1.496	6424
HATS-42b	1.88	1.40	2.2921020	0.03689	1856	transit	2672	1.273	6060
HATS-54b	0.753	1.015	2.5441765	0.0370	1429	transit	2350	1.05	5621	Host star also known as NGTS-22
HATS-55b	0.921	1.251	4.2042001	0.05412	1367	transit	2034	1.20	6214
HATS-56b	0.602	1.688	4.324799	0.06043	1902	transit	1882	1.57	6536
HATS-57b	3.147	1.139	2.3506210	0.03493	1413.4	transit	913	1.03	5587
HATS-58Ab	1.03	1.095	4.2180896	0.05798	1721	transit	1605	1.46	7175
HATS-59b	0.806	1.126	5.416081	0.06112	1128	transit	2140	1.04	5670
HATS-59c	12.70		1422	2.504	175.9	radial vel.	2140	1.04	5670
HATS-60b	0.662	1.153	3.560829	0.04708	1528	transit	1609	1.097	5688
HATS-61b	3.40	1.195	7.817953	0.07908	1226.1	transit	2262	1.08	5542
HATS-62b	0.179	1.055	3.2768837	0.04163	1237	transit	1731	0.90	5416
HATS-63b	0.960	1.207	3.0566527	0.04026	1398.3	transit	2070	0.93	5627
HATS-64b	0.960	1.679	4.908897	0.06562	1793	transit	3640	1.56	6554
HATS-65b	0.821	1.501	3.1051610	0.04497	1634	transit	1631	1.26	6277
HATS-66b	5.33	1.411	3.1414391	0.04714	1998	transit	5040	1.41	6625
HATS-67b	1.45	1.685	1.6091788	0.03032	2193	transit	3219	1.44	6594
HATS-68b	1.290	1.232	3.5862202	0.05071	1741	transit	2004	1.35	6147
HATS-69b	0.577	0.945	2.2252577	0.03211	1295.7	transit	1368	0.89	5137
HATS-70b	12.9	1.384	1.8882378	0.03632	2730	transit	4263	0.81	1.08
	0.415	1.026	11.53533	0.1097	1228.3	transit	260.121	1.324	5521
	1.17	1.44	4.12688	0.0568	2061	transit	645.72	1.43	6801
HD 4917 b	1.615	1.224	400.5	1.167		radial vel.	670.1	1.32	4802	Two additional planets in system are suspected
HD 13167 b	3.31	1.167	2613	4.10		radial vel.	487.8	1.35	5671
HD 14787 b	1.121	1.250	676.6	1.70		radial vel.	389.9	1.43	4946
HD 18015 b	3.18	1.170	2278	3.87		radial vel.	405.2	1.49	5603
HD 23472 b	0.05638	0.179	17.667	0.121	543	transit	127.48	0.67	4684
HD 23472 c	0.05405	0.167	29.625	0.170	467	transit	127.48	0.67	4684
HD 33142 c	5.97		834			radial vel.	37.34	1.78	5009	Marginal detection
HD 55696 b	3.87		1827	3.18		radial vel.	255	1.29	6012
HD 72490 b	1.768	1.218	858	1.88		radial vel.	413.5	1.21	4934
HD 72490 c	4.5		3878	5.22		radial vel.	224	1.26	4867
HD 89345 b	0.110	0.660	11.81430	0.1066	1089	transit	433.1	1.16	5576	Host star also known as K2-234
HD 94834 b	1.26	1.242	1576	2.74		radial vel.	321.0	1.11	4798
HD 98736 b	2.33		968.8	1.864		radial vel.	106	0.92	5271
HD 125390 b	22.16		1756.2	3.16		radial vel.	503	1.36	4850
HD 148164 b	1.23		328.55	0.9930		radial vel.	252	1.21	6032
HD 148164 c	5.16		5062	6.15		radial vel.	252	1.21	6032
HD 148284 b	33.7		339.331	0.9740		radial vel.	400	1.07	5572	Brown dwarf
HD 158996 b	14.0		820.2	2.1		radial vel.	933	1.8	4069
HD 180053 b	2.194	1.203	213.72	0.843		radial vel.	448.7	1.75	5131
HD 180617 b	0.03839		105.9	0.3357		radial vel.	19.28	0.45	3557	Planetary orbit partly in habitable zone
HD 202772 Ab	1.017	1.545	3.308958	0.05208	2132	transit	480.1	1.72	6272
HD 203473 b	7.8		1552.9	2.73		radial vel.	237	1.12	5780
HD 211810 b	0.670		1558	2.656		radial vel.	211	1.03	5652
HD 215152 b	0.0057		5.7600	0.05764		radial vel.	70.48	0.770	4935
HD 215152 e	0.0091		25.197	0.1542		radial vel.	70.48	0.770	4935
HD 217850 b	21.6		3501.3	4.56		radial vel.	215	1.03	5544	Likely a brown dwarf
HD 219666 b						transit				^[8] Host star also known as TOI-118^[9]
HD 220197 b	0.20		1728	2.729		radial vel.	210	0.91	5683
HD 233832 b	1.78		2058	2.827		radial vel.	192	0.71	4981
HD 238914 b	6.0		4100	5.7		radial vel.	982	1.47	4769
IC 4651 9122 b	6.3		734.0	2.038		radial vel.	2870	2.1	9000	Disputed
K2-80d		0.228	28.8673	0.1778		transit	658.7	0.90	5441
K2-138b		0.140	2.35322	0.03380		transit	597	0.93	5378	^[10]
K2-138c		0.225	3.55987	0.04454		transit	597	0.93	5378
K2-138d		0.237	5.40478	0.05883		transit	597	0.93	5378
K2-138e		0.294	8.26144	0.07807		transit	597	0.93	5378
K2-138f		0.251	12.75759	0.10430		transit	597	0.93	5378
K2-141c	0.023	0.624	7.74850	0.06739		transit	202.16	0.708	4599	^[11]
K2-155b	0.015	0.138	6.34365	0.0546	708	transit	237.94	0.65	4258
K2-155c	0.020	0.174	13.85402	0.0946	583	transit	237.94	0.65	4258
K2-155d	0.015	0.146	40.6835	0.1937	381	transit	237.94	0.65	4258
K2-156b		0.103	0.813149	0.0149	1347	transit	492.0	0.66	4597	^[12]
K2-157b		0.094	0.365257			transit		0.94	5456
K2-158b		0.236	10.0605	0.0887	794	transit	647.1	0.92	5503
K2-158c		0.114	5.9028	0.0622	948	transit	647.1	0.92	5503
K2-159b		0.202	12.4221	0.1013	684	transit	560.4	0.90	5425
K2-160b		0.284	3.705871	0.04660		transit	1038	0.983	5649
K2-161b		0.546	9.283188	0.0861		transit	3070	0.987	4972
K2-162b		0.128	9.4589	0.0795	631	transit	407.3	0.75	4842
K2-163b		0.220	6.673117	0.06509		transit	684	0.826	4937
K2-164b		0.290	17.3551	0.1387		transit	1238	1.181	5791
K2-165b		0.1137	2.35499	0.03262		transit	440.6	0.835	5185
K2-165c		0.1386	4.38275	0.04935		transit	440.6	0.835	5185
K2-165d		0.236	14.1014	0.1076		transit	440.6	0.835	5185
K2-166b		0.195	8.5272	0.08583		transit	1577	1.16	5960
		0.252	9.9775	0.0912		transit	264.5	1.02	5908
		0.191	15.8540	0.1195		transit	801	0.907	5554
		0.1136	6.38080	0.06764		transit	774	0.986	5548
		0.127	7.5765	0.07457		transit	1296	0.964	5748
		0.161	12.4000	0.1036		transit	1296	0.964	5748
		0.240	5.6285	0.05960		transit	2010	0.892	5250
		0.1486	14.3169	0.1128		transit	820.3	0.934	5569
K2-172c		0.286	29.6268	0.1832		transit	820.3	0.934	5569
K2-173b		0.1435	5.86870	0.06105

||style="background:#FFFF00"|transit|750.6|0.881|5580||-|K2-174b||0.2223|19.56274|0.1242||style="background:#FFFF00"|transit|326.9|0.668|4500||-|K2-175b||0.182|9.5260|0.0906||style="background:#FFFF00"|transit|812.2|1.095|5909||-|K2-176b||0.1330|5.32944|0.05846||style="background:#FFFF00"|transit|812|0.939|5428||-|K2-177b||0.189|14.1552|0.1221||style="background:#FFFF00"|transit|1628|1.211|6063||-|K2-178b||0.317|8.74782|0.08171||style="background:#FFFF00"|transit|704.7|0.951|5525||-|K2-179b||0.224|5.17219|0.05488||style="background:#FFFF00"|transit|625.7|0.824|5015||-|K2-180b||0.2150|8.86593|0.07550||style="background:#FFFF00"|transit|668.9|0.730|5263||-|K2-181b||0.241|6.89425|0.07191||style="background:#FFFF00"|transit|1189|1.044|5609||-|K2-182b|0.063|0.2469|4.736884|0.05223||style="background:#FFFF00"|transit|507.2|0.847|5159| Confirmed in 2021.|-|K2-183b||0.098|0.469269|0.011586||style="background:#FFFF00"|transit|1083|0.942|5482|^[12] |-|K2-183c||0.224|10.79347|0.09371||style="background:#FFFF00"|transit|1083|0.942|5482|^[12] |-|K2-183d||0.227|22.6295|0.1535||style="background:#FFFF00"|transit|1083|0.942|5482|^[12] |-|K2-184b||0.1372|16.99344|0.1210||style="background:#FFFF00"|transit|247.1|0.819|5252||-|K2-185b||0.117|10.6166|0.09378||style="background:#FFFF00"|transit|882|0.976|5722||-|K2-186b||0.283|41.4742|0.2359||style="background:#FFFF00"|transit|1089|1.019|5784||-|K2-187b||0.123|0.773981|||style="background:#FFFF00"|transit||0.97|5477||-|K2-187c||0.152|2.87179|0.03910||style="background:#FFFF00"|transit|1089|0.967|5477||-|K2-187d||0.287|7.14908|0.07182||style="background:#FFFF00"|transit|1089|0.967|5477||-|K2-187e||0.201|13.6083|0.11031||style="background:#FFFF00"|transit|1089|0.967|5477||-|K2-188b||0.112|1.74298|0.02932||style="background:#FFFF00"|transit|1476|1.107|5982||-|K2-188c||0.234|7.80760|0.07967||style="background:#FFFF00"|transit|1476|1.107|5982||-|K2-189b||0.1349|5.17630|0.05711||style="background:#FFFF00"|transit|795.2|0.928|5503||-|K2-189c||0.222|6.67934|0.06769||style="background:#FFFF00"|transit|795.2|0.928|5503||-|K2-190b||0.1210|10.09886|0.0884||style="background:#FFFF00"|transit|526.5|0.905|5631||-|K2-190c||0.0975|21.5740|0.1467||style="background:#FFFF00"|transit|526.5|0.905|5631||-|K2-191b|||0.04885||style="background:#FFFF00"|transit|1071|1.022|5753||-|K2-219c||0.128|6.6677|0.06982||style="background:#FFFF00"|transit|1071|1.022|5753||-|K2-219d||0.230|11.13728|0.09830||style="background:#FFFF00"|transit|1071|1.022|5753||-|K2-220b||0.198|13.68251|0.11043||style="background:#FFFF00"|transit|766.7|0.960|5599||-|K2-221b||0.1498|2.39909|0.03520||style="background:#FFFF00"|transit|1049|1.011|5716||-|K2-222b|0.0252|0.210|15.38883|0.1190||style="background:#FFFF00"|transit|331.4|0.950|5934||-|K2-223b||0.0812|0.505570|0.012664||style="background:#FFFF00"|transit|651.3|1.06|5835||-|K2-223c||0.144|4.56417|0.05491||style="background:#FFFF00"|transit|651.3|1.06|5835||-|K2-224b||0.139|4.47859|0.05422|1002|style="background:#FFFF00"|transit|904.8|0.91|5620||-|K2-224c||0.215|10.0949|0.08858|764|style="background:#FFFF00"|transit|904.8|0.91|5620||-|K2-225b||0.311|15.8715|0.13385|902|style="background:#FFFF00"|transit|1179|1.27|5742||-|K2-226b||0.137|3.27111|0.04133|1120|style="background:#FFFF00"|transit|693|0.88|5424||-|K2-227b||0.149|13.6218|0.1098||style="background:#FFFF00"|transit|613.9|0.951|5673||-|K2-228b||0.108|2.69837|0.0338|914|style="background:#FFFF00"|transit|423|0.71|4715||-|K2-229b|0.0082|0.102|0.584249|0.012888|1818|style="background:#FFFF00"|transit|335.5|0.87|5315||-|K2-229c|0.067|0.181|8.32801|0.0769|750|style="background:#FFFF00"|transit|335.5|0.87|5315||-|K2-230b||0.175|2.86064|0.0409|1529|style="background:#FFFF00"|transit|1791|1.11|5945||-||||0.22|13.8419|0.1132||style="background:#FFFF00"|transit|1057|1.01|5695||-|K2-232b|0.398|1.000|11.168459|0.10356|1001|style="background:#FFFF00"|transit|427.9|1.188|6154|^[13] |-||||0.1247|2.46746|0.03317|1040|style="background:#FFFF00"|transit|220.60|0.800|4950||-||||0.1191|7.06142|0.06687|728|style="background:#FFFF00"|transit|220.60|0.800|4950||-||||0.236|24.3662|0.1527|482|style="background:#FFFF00"|transit|220.60|0.800|4950||-|K2-236b|0.085|0.546|19.49213|0.148|886|style="background:#FFFF00"|transit|595.7|1.18|6025| First exoplanet discovered by scientists based in India.|-|K2-237b|1.60|1.65|2.18056|0.037|1884|style="background:#FFFF00"|transit|1036|1.28|6257| Also called EPIC 229426032 b|-|||0.86|1.30|3.20466|0.046|1587|style="background:#FFFF00"|transit|22000|1.19|5630| Also called EPIC 246067459 b|-|K2-239b|0.0044|0.098|5.240|0.0441|502|style="background:#FFFF00"|transit|101.48|0.40|3420||-|K2-239c|0.0028|0.089|7.775|0.0576|427|style="background:#FFFF00"|transit|101.48|0.40|3420||-|K2-239d|0.0041|0.098|10.115|0.0685|399|style="background:#FFFF00"|transit|101.48|0.40|3420||-|||0.016|0.18|6.034|0.0513|586|style="background:#FFFF00"|transit|238.3|0.58|3810||-|||0.014|0.16|20.523|0.1159|389|style="background:#FFFF00"|transit|238.3|0.58|3810||-|K2-241b||0.227|26.8199|0.1567|507|style="background:#FFFF00"|transit|489.6|0.71|5262||-|K2-242b||0.227|6.51389|0.0494|416|style="background:#FFFF00"|transit|357.4|0.38|3459||-|K2-243b||0.194|11.5418|0.1087|1035|style="background:#FFFF00"|transit|877|1.29|6570||-|K2-243c||0.179|24.9460|0.1817|801|style="background:#FFFF00"|transit|877|1.29|6570||-|K2-244b||0.156|21.0688|0.1418|638|style="background:#FFFF00"|transit|698.6|0.86|5677||-|K2-245b||0.387|11.89307|0.0959|923|style="background:#FFFF00"|transit|1507|0.83|5793||-|K2-246b||0.311|5.76918|0.0602|977|style="background:#FFFF00"|transit|2341|0.87|5610||-|K2-247b||0.189|2.25021|0.0304|979|style="background:#FFFF00"|transit|848.1|0.74|4667||-|K2-247c||0.195|6.4942|0.0615|688|style="background:#FFFF00"|transit|848.1|0.74|4667||-|K2-248b||0.229|7.1726|0.0699|886|style="background:#FFFF00"|transit|1341|0.88|5528||-|K2-249b||0.249|12.4090|0.1151|1061|style="background:#FFFF00"|transit|1726|1.32|6504||-|K2-250b||0.218|4.01457|0.0459|958|style="background:#FFFF00"|transit|1369|0.80|5172||-|K2-251b||0.210|9.3008|0.0694|437|style="background:#FFFF00"|transit|481.6|0.52|3717||-|K2-252b||0.155|13.8151|0.1041|639|style="background:#FFFF00"|transit|751.3|0.79|5152||-|K2-253b||1.130|4.00167|0.0506|1238|style="background:#FFFF00"|transit|2933|1.08|6027||-|K2-254b||0.145|4.09639|0.0448|791|style="background:#FFFF00"|transit|747.8|0.71|4629||-|K2-254c||0.195|12.1184|0.0923|551|style="background:#FFFF00"|transit|747.8|0.71|4629||-|K2-255b||0.259|1.96417|0.0274|1034|style="background:#FFFF00"|transit|628.4|0.71|4676||-|K2-257b||0.074|1.60588|0.0216|789|style="background:#FFFF00"|transit|209.14|0.52|3725||-|K2-258b||0.268|19.0921|0.1490|

Notes and References

1. Web site: NASA Exoplanet Archive. exoplanetarchive.ipac.caltech.edu. California Institute of Technology. 27 March 2018.
2. Web site: The Extrasolar Planets Encyclopaedia. 1995. 20 January 2018.
3. Planets around the evolved stars 24 Booties and γ Libra: A 30d-period planet and a double giant-planet system in possible 7:3 MMR . Takarada . Takuya . Sato . Bun'ei . Omiya . Masashi . Harakawa . Hiroki . Nagasawa . Makiko . Izumiura . Hideyuki . Kambe . Eiji . Takeda . Yoichi . Yoshida . Michitoshi . Itoh . Yoichi . Ando . Hiroyasu . Kokubo . Eiichiro . Ida . Shigeru . Publications of the Astronomical Society of Japan . 1 . 1804.04008 . 2018 . 70 . 4 . 10.1093/pasj/psy052 . 119027104 .
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