List of periodic comets

Periodic comets (also known as short-period comets) are comets with orbital periods of less than 200 years or that have been observed during more than a single perihelion passage[1] (e.g. 153P/Ikeya–Zhang). "Periodic comet" is also sometimes used to mean any comet with a periodic orbit, even if greater than 200 years.

For a list of numbered periodic comets, see List of numbered comets.

Periodic comets receive a permanent number prefix usually after the second perihelion passage, which is why there are a number of unnumbered periodic comets, such as P/2005 T5 (Broughton). Comets that are not observed after a number of perihelion passages, or presumed to be destroyed, are given the D designation, and likewise comets given a periodic number and subsequently lost are given [n]D instead of [n]P, such as 3D/Biela or 5D/Brorsen.

In nearly all cases, comets are named after their discoverer(s), but in a few cases such as 2P/Encke and 27P/Crommelin they were named for a person who calculated their orbits (the orbit computers). The long-term orbits of comets are difficult to calculate because of errors in the known trajectory that accumulate with perturbations from the planets, and in the days before electronic computers some people dedicated their entire careers to this. Even so, quite a few comets were lost because their orbits are also affected by non-gravitational effects such as the release of gas and other material that forms the comet's coma and tail. Unlike a long-period comet, the next perihelion passage of a numbered periodic comet can be predicted with a high degree of accuracy.

Periodic comets sometimes bear the same name repeatedly (e.g. the nine Shoemaker–Levy comets or the twenty-four NEAT comets); the IAU system distinguishes between them either through the number prefix or by the full designation (e. g. 181P and 192P/Shoemaker–Levy are both "Comet Shoemaker–Levy"). In the literature, an informal numbering system is applied to periodic comets (skipping the non-periodic ones), thus 181P and 192P are known as Comet Shoemaker–Levy 6 and Comet Shoemaker–Levy 1, respectively. Non-periodic Shoemaker–Levy comets are interleaved in this sequence: C/1991 B1 between 2 and 3, C/1991 T2 between 5 and 6, C/1993 K1 and C/1994 E2 after Shoemaker–Levy 9.

In comet nomenclature, the letter before the "/" is either "C" (a non-periodic comet), "P" (a periodic comet), "D" (a comet that has been lost or has disintegrated), "X" (a comet for which no reliable orbit could be calculated —usually historical comets), "I" for an interstellar object, or "A" for an object that was either mistakenly identified as a comet, but is actually a minor planet,[1] or for an object on a hyperbolic orbit that does not show cometary activity.[2] Some lists retain the "C" prefix for comets of periods larger than about 30 years until their return is confirmed.[3]

List of Halley-type comets

Main article: List of Halley-type comets

List of unnumbered Jupiter-Family comets

While Jupiter-family comets are officially defined by (2< T_Jupiter <3), they can also be loosely defined by any comet with a period of less than 20 years, a relatively low inclination, and an orbit coinciding loosely with that of Jupiter's. These comets are often patchily observed, as orbital interactions with the planet often cause comets' orbits to become perturbed, causing them to not be found at the expected position in the sky and subsequently lost. Additionally, their low cometary albedos and frequent proximity to the Sun compared to Oort Cloud comets cause them to much more quickly become depleted of volatiles, making them comparatively dimmer than comets with longer orbital periods.

Comet designation	Name	Eccentricity	Semimajor axis (AU)	Period (years)	Inclination (°)	Perihelion distance (AU)	Absolute magnitude	Last perihelion	Next unobserved perihelion
X/1979 O3	Kowal	0.33	3.09	5.44	1.75	2.07	15.8	1979/07/26	1985
X/1981 R1	Stattmayer	0.26	2.45	3.84	11.00	1.28	13.4	1981/08/18	1986
3200 Phaeton	IRAS	0.88990215	1.271205253	1.43	22.245786	0.13995697	14.6	2016/08/19	2018/01/23
X/1991 G1	Meyer	0.44	2.41	3.73	5.96	1.36	18.7	1991/04/11	1995[4]
P/1996 R2	Lagerkvist	0.30998	3.782	7.36	2.6054	2.60964	6.3	1997/01/19	2004/05/30
P/1998 VS24	LINEAR	0.24393	4.5041	9.56	5.031	3.4054	11.3	1998/11/03	2008/05/26
P/1999 J6	SOHO	0.98418	3.1005	5.46	26.61	0.04906		2004/11/08	2021/03/27
P/1999 RO28	LONEOS	0.65079	3.5272	6.62	8.191	1.23176	19.4	1999/10/02	2006/05/17
P/1999 XN120	Catalina	0.21391	4.1806	8.55	5.0283	3.2863	9.9	2000/05/01	2008/11/17
P/2000 R2	LINEAR	0.5837	3.338	6.1	3.2163	1.38997	17.6	2000/09/12	2006/10/18
P/2001 H5	NEAT	0.6002	5.995	14.68	8.3993	2.3966	6.8	2001/01/28	2015/10/03
P/2002 EJ57	LINEAR	0.59391	6.49	16.53	4.9697	2.6355	15.8	2001/12/19	2018/06/30
C/2002 R5	SOHO	0.98526	3.21612	5.77	14.12	0.0474		2002/09/05	2008/02/02
P/2002 S7	SOHO	0.98496	3.22344	5.79	13.6	0.04849		2002/09/21	2008/07/06
P/2002 T5	LINEAR	0.437146	6.98979	18.48	30.90295	3.934176	9	2003/06/28	2021/12/20
P/2003 F2	NEAT	0.54219	6.503	16.58	11.605	2.9772	13.7	2003/04/14	2019/11/12
P/2003 T12	SOHO	0.775433	2.570078	4.12	11.4579	0.57716	19.7	2016/03/09	2020/05/06
X/2004 D5	Murakami					1.1		2004/02/15	?
P/2004 FY140	LINEAR	0.1709	4.9523	11.02	2.1279	4.1061	12.5	2004/08/06	2015/08/13
P/2004 R3	LINEAR-NEAT	0.44184	3.8367	7.52	7.9723	2.14148	13.5	2004/05/24	2011/11/30
P/2004 V3	Siding Spring	0.4467	7.117	18.99	50.4529	3.93839	11.5	2004/11/11	2023/11/07
P/2005 E1	Tubbiolo	0.3847	7.225	19.42	5.154	4.4456	10.7	2005/03/18	2024/08/15
P/2005 J1	McNaught	0.57096	3.5664	6.74	31.7659	1.53015	13.4	2005/04/17	2012/01/12
P/2005 L1	McNaught	0.20924	3.9745	7.92	7.7369	3.1428	10.2	2005/12/13	2013/11/14
P/2005 SB216	LONEOS	0.463208	7.11312	18.97	24.09843	3.818266	9.9	2007/02/11	2018/01/31
P/2005 T2	Christensen	0.4219	3.825	7.48	8.3378	2.2112	10.4	2005/04/11	2012/10/03
P/2005 T5	Broughton	0.55245	3.2468	19.54	21.3724	3.2468	11.2	2005/11/03	2025/05/19
P/2005 W3	Kowalski	0.53052	6.4078	16.22	16.7781	3.0081	8.5	2005/08/23	2021/11/11
P/2005 XA54	LONEOS-Hill	0.71015	6.133	15.19	16.89592	1.777668	9.4	2006/03/07	2021/05/15
P/2006 H1	McNaught	0.58157	5.6843	13.55	12.87015	2.37848	9	2006/05/07	2019/11/24
P/2006 S4	Christensen	0.50808	6.2367	15.58	39.6258	3.06798	6.3	2006/06/01	2021/12/30
P/2006 WY182	Christensen	0.55856	6.3347	15.94	26.4916	2.79639	13.7	2007/01/17	2012/12/26
P/2007 B1	Christensen	0.58097	5.8295	14.08	12.3748	2.44272	13.9	2007/01/19	2021/02/17
P/2007 C2	Catalina	0.462251	7.0283	18.63	8.6747	3.779481	10	2007/09/04	2026/04/22
P/2007 K2	Gibbs	0.684	7.18	19.23	7.6197	2.2686	14	2007/06/08	2026/09/01
P/2007 Q2	Gilmore	0.67123	5.594	13.23	10.2384	1.83902	16.7	2007/08/23	2020/11/15
P/2007 R2	Gibbs	0.57371	3.4385	6.38	1.43387	1.4658	16.5	2007/08/26	2014/01/12
P/2007 R4	Garradd	0.67143	5.8476	14.14	20.2257	1.92137	14.7	2007/09/27	2021/11/17
P/2007 S1	Zhao	0.34339	3.7989	7.4	5.973	2.4944	13.5	2007/12/06	2015/05/01
P/2007 T2	Kowalski	0.77483	3.0904	5.43	9.89528	0.695863	18.6	2007/09/19	2013/02/23
P/2007 VQ11	Catalina	0.50227	5.4113	12.59	12.32465	2.69336	12.5	2008/02/13	2020/09/16
P/2008 CL94	Lemmon	0.11941	6.1706	15.33	8.34819	5.4337	8.5	2006/06/30	2021/10/28
P/2008 L2	Hill	0.613815	6.00069	14.7	25.86062	2.317378	10.4	2008/08/18	2022/05/01
P/2008 QP20	LINEAR-Hill	0.506314	3.49034	6.52	7.74972	1.723133	13.9	2008/11/02	2015/05/11
P/2008 WZ96	LINEAR	0.5096	3.3567	6.15	6.95786	1.64624	15.2	2009/01/23	2015/03/19
P/2008 Y12	SOHO	0.9787	3.07822	5.4	23.35	0.0654		2008/12/22	2014/05/17
P/2009 B1	Boattini	0.63719	6.688	17.3	22.2285	2.42659	13.2	2009/02/06	2026/05/27
P/2009 Q1	Hill	0.49649	5.5409	13.04	14.443	2.78988	12.9	2009/07/04	2022/07/19
P/2009 Q4	Boattini	0.579197	3.13894	5.56	10.96932	3.13894	15.5	2009/11/19	2015/06/11
P/2009 U4	McNaught	0.6762	5.093	11.49	10.0939	1.64936	12.7	2009/09/09	2021/03/07
P/2009 WX51	Catalina	0.740297	3.0803	5.41	9.5926	0.799956	20.6	2010/01/31	2015/06/30
P/2009 Y2	Kowalski	0.64052	6.507	16.6	29.9296	2.33919	6.1	2010/03/30	2026/11/04
P/2010 A3	Hill	0.73223	6.0568	14.91	15.02825	1.621828	6.5	2010/04/03	2025/03/01
P/2010 A5	LINEAR	0.664312	5.1001	11.52	5.78438	1.712045	14.8	2010/04/19	2021/10/26
P/2010 B2	WISE	0.4803	3.1104	5.49	8.9316	1.61646	16.1	2009/12/21	2015/06/18
P/2010 C1	Scotti	0.25911	7.0657	18.78	9.14247	5.2349	5.7	2009/12/01	2028/09/12
P/2010 D2	WISE	0.45301	6.6894	17.3	57.17704	3.65902	11.1	2010/03/05	2027/06/23
P/2010 H2	Vales	0.192894	3.85038	7.56	14.2529	3.10767	6.9	2010/03/09	2017/09/29
P/2010 H4	Scotti	0.272	6.624	17.05	2.314	4.821	10.8	2010/07/03	2027/07/21
P/2010 H5	Scotti	0.15646	7.1436	19.09	14.0871	6.0259	9.6	2010/04/17	2029/05/20
P/2010 T2	PANSTARRS	0.3231	5.546	13.06	8.0109	3.754	6.4	2011/07/09	2024/07/31
P/2010 TO20	LINEAR-Grauer	0.088685	5.6006	13.25	2.6399	5.1039	5.9	2008/09/08	2021/12/21
P/2010 U1	Boattini	0.26112	6.636	17.09	8.24623	4.90317	6	2010/03/28	2027/04/30
P/2010 UH55	Spacewatch	0.57514	6.515	16.63	8.66257	2.767969	6.6	2011/05/10	2027/12/26
P/2010 WK	LINEAR	0.691987	5.7309	13.72	11.47913	1.765178	12.4	2010/10/19	2024/07/09
P/2011 A2	Scotti	0.49861	3.1089	5.48	4.47394	1.558782	15.1	2010/12/22	2016/06/15
P/2011 C2	Gibbs	0.26846	7.366	19.99	10.91098	5.38854	6.2	2012/01/07	2032/01/03
P/2011 FR143	Lemmon	0.45305	6.8296	17.85	16.01358	3.73541	11.1	2011/03/10	2029/01/14
P/2011 N1	ASH	0.545926	6.2935	15.79	35.66877	2.857712	10.3	2012/05/31	2028/03/15
P/2011 NO1	Elenin	0.777	5.56	13.1	15.27	1.243	13.3	2011/01/20	2024
P/2011 Q3	McNaught	0.53153	5.0543	11.36	6.052	2.36778	14.8	2011/08/14	2022/12/23
P/2011 R3	Novichonok	0.267569	4.85703	10.7	19.26164	3.557436	10.5	2012/04/03	2022/12/15
P/2011 U2	Bressi	0.11137	5.4436	12.7	9.62363	4.83734	5.5	2012/05/07	2025/01/18
P/2011 UA134	Spacewatch-PANSTARRS	0.6327	5.5854	13.2	10.5395	2.05151	15.7	2011/12/07	2025/02/18
P/2011 V1	Boattini	0.555	3.843	7.53	7.397	1.7094	13.7	2011/05/11	2018/11/15
P/2011 W1	PANSTARRS	0.28866	4.65606	10.05	3.71861	3.31206	6.2	2012/01/22	2022/02/09
P/2011 Y2	Boattini	0.71291	6.2251	15.53	6.35139	1.787145	13.6	2012/03/21	2027/09/03
P/2012 B1	PANSTARRS	0.4104966	6.4887702	16.53	7.62779	3.8251522	5.6	2013/07/23	2030/02/01
P/2012 F2	PANSTARRS	0.54224	6.3287	15.92	14.72465	2.89707	12	2013/04/10	2029/03/12
P/2012 G1	PANSTARRS	0.3852	4.1967	8.60	11.6965	2.580	15.2	2012/06/06	2021/01/08
P/2012 K3	Gibbs	0.42596	3.618	6.88	13.2012	2.07686	6.9	2012/09/30	2019/08/17
P/2012 O1	McNaught	0.57925	3.563	6.73	11.4286	1.499145	16.6	2012/07/23	2019/04/15
P/2012 O2	McNaught	0.53827	3.597	6.82	24.5274	1.660834	17.3	2012/06/25	2019/04/20
P/2012 O3	McNaught	0.648808	4.5544	9.72	16.49674	1.599449	15.8	2012/08/16	2022/05/06
P/2012 S2	La Sagra	0.69059	4.4316	9.33	8.58181	1.371192	15.3	2012/08/18	2021/12/16
P/2012 SB6	Lemmon	0.38462	3.91053	7.73	10.9897	2.4065	14.1	2012/10/31	2020/07/24
P/2012 T2	PANSTARRS	0.159	5.735	13.73	12.562	4.823	10.2	2013/04/10	2026/12/31
P/2012 T3	PANSTARRS	0.66	6.7	17.2	9.65	2.29	14.8	2012/04/15	2029
P/2012 TK8	Tenagra	0.26137	4.1847	8.56	6.29457	3.09093	6.9	2013/05/10	2021/11/30
P/2012 U2	PANSTARRS	0.50657	7.3522	19.94	10.5345	3.6278	12.1	2012/12/04	2032/11/12
P/2012 US27	Siding Spring	0.64858	5.1814	11.79	39.29295	1.820844	6.8	2013/02/08	2024/11/23
P/2012 WA34	Lemmon-PANSTARRS	0.34025	4.8097	10.55	6.1167	3.1732	12.7	2013/01/25	2023/08/14
P/2013 A2	Scotti	0.45584	4.0014	8	3.3661	2.17739	16	2013/02/07	2021/02/07
P/2013 AL76	Catalina	0.685	6.51	16.6	144.861	2.0476	16	2012/12/13	2029
P/2013 EW90	Tenagra	0.19621	4.10605	8.32	31.8102	3.3004	12.2	2012/10/11	2021/02/05
P/2013 G1	Kowalski	0.51237	6.8765	18.03	5.46867	3.353099	10.3	2013/12/10	2031/12/21
P/2013 G4	PANSTARRS	0.4104	4.432	9.33	5.926	2.6132	15.1	2013/02/09	2022/06/09
P/2013 J2	McNaught	0.656146	6.24634	15.61	15.49553	2.147828	10.8	2013/08/22	2029/04/02
P/2013 J4	PANSTARRS	0.64613	6.4631	16.43	4.7613	2.2871	14.5	2013/07/24	2029/12/29
P/2013 N5	PANSTARRS	0.7319	6.801	17.74	23.2425	1.82305	14.7	2013/07/02	2031/03/29
P/2013 O2	PANSTARRS	0.43894	3.82491	7.48	13.30706	2.1401	13.1	2013/12/16	2021/06/09
P/2013 R3	Catalina-PANSTARRS	0.27345	3.03293	5.28	0.89893	2.20358	6.4	2013/08/05	2018/11/15
P/2013 R3-A	Catalina-PANSTARRS	0.2733	3.0327	5.28	0.898	2.2038		2013/08/05	2018/11/15
P/2013 R3-B	Catalina-PANSTARRS	0.2733	3.0327	5.28	0.8996	2.2038		2013/08/05	2018/11/15
P/2013 T1	PANSTARRS	0.6233	5.867	14.21	24.21	2.2105	16.6	2013/07/31	2027/10/16
P/2013 T2	Schwartz	0.52849	3.3926	6.25	9.3521	1.59962	14.4	2013/06/20	2020/09/19
P/2013 TL117	Lemmon	0.689914	3.60439	6.84	9.36564	1.1176721	16.9	2014/02/18	2020/12/22
P/2013 W1	PANSTARRS	0.59388	3.4857	6.51	4.69951	1.415614	16.5	2014/03/08	2020/09/11
P/2013 YG46	Spacewatch	0.4516	3.3103	6.02	8.217	1.815	10.6	2017/01/19	2023/01/26
P/2014 A2	Hill	0.64983	5.9248	14.42	24.5135	2.07468	13.4	2013/10/28	2027/03/30
P/2014 A3	PANSTARRS	0.242	4.6796	10.12	13.6706	3.547	12.5	2013/04/18	2023/06/01
P/2014 C1	TOTAS	0.446	3.043	5.31	2.6796	1.6857	15.6	2013/12/18	2019/04/10
P/2014 E1	Larson	0.423184	3.71198	7.15	15.97916	2.141133	14.5	2014/05/22	2021/07/16
P/2014 L2	NEOWISE	0.646763	6.32589	15.91	5.18441	2.234541	8.6	2014/07/15	2030/06/15
P/2014 M4	PANSTARRS	0.59557	5.8139	14.02	3.34519	2.3513	13.1	2014/12/27	2029/01/02
P/2014 MG4	Spacewatch-PANSTARRS	0.259172	5.01227	11.22	9.36876	3.71323	8.5	2013/06/13	2024/09/01
P/2014 R5	Lemmon-PANSTARRS	0.4128	4.0634	8.19	1.0881	2.3859	13.1	2014/06/17	2022/08/25
P/2014 U4	PANSTARRS	0.4711	3.4853	6.51	6.4571	1.8434	15.4	2014/08/03	2020/02/05
P/2014 V1	PANSTARRS	0.4	4	8	23	2.6	13.4	2014/12/18	2023
P/2014 W4	PANSTARRS	0.35312	6.5877	16.91	15.2738	4.26150	6.1	2015/12/29	2032/11/26
P/2015 C1	TOTAS-Gibbs	0.56256	6.6126	17.00	13.8774	2.89264	12.8	2015/05/01	2032/05/01
C/2015 D1	SOHO	0.9943	4.9	11	69.62	0.02832	14.7	2015/02/19	2026
P/2015 D6	Lemmon-PANSTARRS	0.3696	7.239	19.48	20.1839	4.5637	11.0	2015/07/13	2035/01/03
P/2015 F1	PANSTARRS	0.27825	3.52142	6.61	2.80440	2.54160	12.2	2015/03/14	2021/10/22
P/2015 J3	NEOWISE	0.55404	3.3503	6.13	8.1252	3.3503	15.9	2015/03/03	2021/04/19
P/2015 K5	PANSTARRS	0.5540	6.694	17.32	39.987	2.9861	13.7	2015/06/06	2032/09/30
P/2015 M2	PANSTARRS	0.17896	7.2017	19.33	3.9741	5.9128	8.2	2015/08/31	2024/12/29
P/2015 P4	PANSTARRS	0.58424	6.0736	14.97	8.71375	2.52516	6.5	2016/01/19	2031/01/08
P/2015 PD229	Cameron-ISON	0.32673	7.1768	19.23	2.02687	4.83188	11.0	2015/08/14	2034/11/06
C/2015 Q1	Scotti	0.489227	3.42951	6.35	22.64933	1.751699	12.7	2015/09/09	2022/01/14
C/2015 R1	PANSTARRS	0.63286	5.8982	14.32	22.6683	2.16545	13.4	2015/06/25	2030/01/04
P/2015 R2	PANSTARRS	0.440	4.36	9.1	14.8	2.44	15.8	2015/06/19	2021/07/29
P/2015 T3	PANSTARRS	0.43	3.9	7.7	12.2	2.21	15.0	2015/03/12	2023
P/2015 TO19	Lemmon-PANSTARRS	0.35898	4.5638	9.75	6.4999	2.92547	6.6	2016/03/06	2025/12/04
P/2015 TP200	LINEAR	0.53621	7.2993	19.72	8.77231	3.38531	13.9	2016/10/28	2036/07/18
P/2015 W2	Catalina	0.63411	7.3200	19.80	11.6113	2.67834	13.7	2015/09/30	2035/07/19
P/2015 X1	PANSTARRS	0.42039	3.6292	6.91	12.1622	2.10355	16.3	2015/10/10	2022/09/07
P/2015 X3	PANSTARRS	0.4382	5.024	11.26	24.38	2.822	14.5	2015/08/07	2026/11/09
P/2015 X6	PANSTARRS	0.1700	2.756	4.57	4.5583	2.2873	16.1	2016/03/18	2020/07/08
P/2016 A2	Christensen	0.274	4.75	10.34	26.8	3.45	12.1	2015/06/16	2025/10/19
P/2016 A7	PANSTARRS	0.56662	5.0225	11.26	16.6374	2.17665	7.3	2016/02/25	2027/05/31
P/2016 BA14	PANSTARRS	0.66617928	3.0215769	5.25	18.918089	1.00866495	20.8	2016/03/15	2021/06/14
P/2016 G1	PANSTARRS	0.21003	2.58322	4.15	10.9685	2.04068	14.7	2017/01/26	2021/03/21
P/2016 J1-A	PANSTARRS	0.228265	3.17209	5.65	14.33019	2.44801	16.5	2016/06/24	2022/02/16
P/2016 J1-B	PANSTARRS	0.228231	3.17201	5.65	14.3312	2.44806	16.8	2016/06/24	2022/02/16
P/2016 J3	STEREO	0.8803526	3.902604	7.71	25.32992	0.467	13.3	2016/05/21	2024/02/05
P/2016 P1	PANSTARRS	0.294	3.23	5.8	26	2.28	15.5	2015/09/07	2021/08/11
P/2016 R4	Gibbs	0.47506	5.3350	12.32	10.8621	2.80052	13.1	2016/07/20	2028/11/13
P/2017 B4	PANSTARRS	0.360	4.37	9.1	19.9	2.80	14.6	2017/01/21	2026/05/06
P/2017 D1	Fuls	0.44033	4.80244	10.52	20.7326	2.688	13.4	2016/06/28	2027/01/06
P/2017 K3	Gasparovic	0.58125	5.574272	13.16	4.27872	2.3342	14.6	2017/05/31	2030/07/29
P/2017 R1	PANSTARRS	0.195005	4.1325	8.40	2.57265	3.32669	13.9	2017/04/07	2025/09/01
P/2017 S5	ATLAS	0.31330	3.172446	5.65	11.8503	2.1784	14.1	2017/07/27	2023/03/21
P/2017 S8	PANSTARRS	0.393696	2.77621	4.63	29.85994	1.68322	14.8	2018/01/28	2022/09/13
P/2017 S9	PANSTARRS	0.30457	3.15659	5.61	14.1380	2.19518	16.8	2017/07/23	2023/03/03
P/2017 TW13	Lemmon	0.7098	7.163	19.17	44.837	2.07878	15	2018/06/20	2037/08/22
P/2017 U3	PANSTARRS	0.0997	4.936	10.97	15.909	4.444	11.1	2019/04/22	2030/04/09
P/2018 A4	PANSTARRS	0.7818	10.974	36.35	3.1423	2.395	6.9	2018/05/19	2054
P/2018 A5	PANSTARRS	0.5230	5.648	13.42	23.577	2.694	13.9	2017/09/23	2031
P/2018 C1	Lemmon-Read	0.5345	5.577	13.17	5.1350	2.596	13.9	2018/02/24	2031
P/2018 H2	PANSTARRS	0.5398	4.405	9.25	7.389	2.027	15.4	2018/01/23	2027
P/2018 L1	PANSTARRS	0.4822	3.642	6.95	10.588	1.886	14.6	2018/11/12	2025
P/2018 L4	PANSTARRS	0.6598	4.928	10.94	26.619	1.676	8.9	2018/07/31	2029
P/2018 L5	Leonard	0.363355	3.61815	6.88	2.209	2.3035	6.8	2018/05/04	2025
P/2018 P3	PANSTARRS	0.4168	3.01577	5.24	8.91257	1.759	17.8	2018/10/08	2024
P/2018 P4	PANSTARRS	0.449	6.656	17.17	23.108	3.6664	12.1	2018/11/06	2036
C/2018 P5	PANSTARRS	0.6405	12.72968	45.42	7.2568	4.576	6.5	2019/02/26	2064
P/2018 V5	Trujillo-Sheppard	0.475	8.961	26.83	10.58	4.71	8.5	2018/10/03	2045
P/2018 VN2	Leonard	0.479	4.0639	8.19	18.147	2.1172	16.4	2018/06/06	2026
P/2018 Y2	Africano	0.4791	7.4765	20.44	11.687	3.8946	11	2019/01/02	2039
P/2019 A1	PANSTARRS	0.5689	5.1307	11.62	13.744	2.2117	13.7	2018/10/11	2030
P/2019 A2	ATLAS	0.3820	5.7331	13.73	14.856	3.543	10.8	2018/11/21	2032
P/2019 A3	PANSTARRS	0.2648	3.1471	5.58	15.366	2.3134	14.9	2018/08/01	2024
P/2019 A4	PANSTARRS	0.0896	2.6135	4.23	13.3190	2.3794	15.4	2018/12/05	2023
P/2019 A6	Lemmon - PANSTARRS	0.6392	5.3725	12.45	33.2283	1.9385	14.5	2018/08/29	2031
P/2019 A7	PANSTARRS	0.1608	3.1884	5.69	17.7725	2.6759	13.2	2018/01/08	2023
P/2019 A8	PANSTARRS	0.4387	3.3544	6.14	2.9667	1.8828	13.6	2018/09/02	2024
P/2019 B2	Groeller	0.3729	3.8534	7.56	16.8287	2.4165	6.6	2019/06/08	2026
P/2019 F2	ATLAS	0.8651	16.5508	67.33	19.1874	2.2328	6.2	2019/09/08	2086
P/2019 GG21	PANSTARRS	0.4720	7.4553	20.36	6.0898	3.9365	15.0	2019/05/08	2039
P/2019 LD2	ATLAS	0.1407	5.3279	12.30	11.52	4.58	12.2	2020/04/07	2032
P/2019 M2		0.648	3.0198	5.25	12.2722	1.063	21.2	2019/06/22	2024
P/2019 S2	PANSTARRS	0.20668	4.7335	10.30	10.473	3.7552	13.1	2019/02/20	2029
P/2019 S3	PANSTARRS	0.4706	3.413	6.31	8.692	1.8067	17.9	2019/08/26	2025
P/2019 T6	PANSTARRS	0.6235	5.454	12.74	18.7574	2.0534	15.7	2019/11/08	2032
P/2019 U4	PANSTARRS	0.475	3.5194	6.60	11.6916	1.847	18.6	2019/09/18	2026
P/2019 W1	PANSTARRS	0.266	4.55	9.71	23.462	3.34	13.2	2019/05/07	2029
P/2019 X1	Pruyne	0.3037	6.18	15.36	10.24	4.3026	10.3	2019/07/20	2034
P/2019 X2	PANSTARRS	0.499	3.643	6.95	15.88	1.824	18.1	2019/12/09	2026
P/2019 Y2	Fuls	0.3935	3.51	6.58	4.9	2.1293	13.8	2020/01/31	2026
P/2019 Y3	Catalina	0.6956	2.9957	5.19	24.634	0.91196	19.2	2019/12/13	2025
P/2020 G1	Pimentel	0.861	3.65	6.98	18.49	0.506	18.7	2020/03/17	2027
P/2020 K9	Lemmon-PANSTARRS	0.32254	4.201	8.61	23.205	2.846	12.3	2021/02/12	2029
P/2020 M1	PANSTARRS	0.477	5.0874	11.47	8.633	2.661	10.1	2019/12/21	2031
P/2020 O1	Lemmon-PANSTARRS	0.12	2.65	4.31	5.221	2.3284	15.9	2020/05/03	2024
P/2020 O3	PANSTARRS	0.1054	4.668	10.09	8.4497	4.1762	12.3	2021/01/02	2031

See also

• List of comets by type
• List of numbered comets
• List of non-periodic comets

References

1. "Cometary Designation System". Minor Planet Center. Retrieved 2011-07-03.
2. "MPEC 2018-H54 : 2. A/ Objects". Minor Planet Center. 20 April 2018. Retrieved 12 August 2018.
3. Comet names and designations
4. Meyer, Maik. "Unknown comet of 11 April 1991". comethunter.de. Retrieved 18 January 2016.

External links

• Minor Planet Center Periodic Comet Numbers
• Cometography.com Periodic Comets
• Seiichi Yoshida's Comet Catalog
• MPC: Dates of Last Observation of Comets (periodic and non-periodic)