The following is a list of Halley-type comets (HTCs), which are periodic comets with an orbital period between 20 and 200 years, often appearing only once or twice within one's lifetime. The majority come from between the orbits of Saturn and Neptune. Due to the nature of their orbits, they can be perturbed by the giant planets and sent into orbits too far from the Sun to outgas, and vice versa. Minor planets in comet-like orbits similar to HTCs that never come close enough to the Sun to outgas are called centaurs. HTCs are named after the first discovered member, and the first discovered periodic comet, Halley's Comet, which orbits the Sun in about 75 years, and passing as far as the orbit of Neptune.
Most of the comets that have a period between 20 and 200 years (making them HTCs based on the classical definition) are actually officially classified as either Jupiter-family comets (JFCs) or Chiron-type comets (CTCs), based on their Jupiter Tisserand's parameter (TJupiter). Although JFCs are classically defined by (P < 20 y), they're officially defined by (2 < TJupiter < 3). CTCs, on the other hand, are officially defined by (TJupiter > 3; a > aJupiter). Since they do not include any period-related constraints, some of the 20–200 year-period comets unfortunately match one of the classifications, making comet classifications even more vague.
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Numbered HTCs
For the 15 numbered HTCs, see the list of numbered comets, where they are labelled "HTC" in column "class".
Unnumbered HTCs
This list contains only Halley-type comets which are not numbered yet because they have been observed only once. Comets that belong to a different comet classification based on its Jupiter Tisserand parameter are given its alternative classification next to the comets' name.
| Comet designation | Name/ discoverer(s) | Period (years) | e | a (AU) |
q (AU) |
i (°) |
Abs. mag (M1) | Last observed perihelion | Next perihelion | Ref |
|---|---|---|---|---|---|---|---|---|---|---|
| C/1917 F1 | Mellish | 145 | 0.993121 | 27.6473325 | 0.190186 | 32.6828 | 1917/04/11 | 2062 | MPC · JPL | |
| C/1921 H1 | Dubiago | 70.8 | 0.9348 | 17.102 | 1.116 | 22.34 | 1921/05/04 | 2062 | MPC · JPL | |
| C/1937 D1 | Wilk | 187 | 0.981098 | 32.7445244 | 0.618937 | 26.0205 | 1937/02/21 | 2124 | MPC · JPL | |
| C/1942 EA | Väisälä | 85.4 | 0.933639 | 19.3951116 | 1.287079 | 37.9961 | 1942/02/15 | 2027/07/10 | MPC · JPL | |
| C/1984 A1 | Bradfield 1 | 152.3 | 0.9524 | 28.5 | 1.35751 | 51.8005 | 9.6 | 1983/12/27 | 2136/04/01 | MPC · JPL |
| C/1989 A3 | Bradfield | 81.9 | 0.977708 | 18.853 | 0.420271 | 83.0672 | 1988/12/05 | 2070/11/01 | MPC · JPL | |
| C/1991 L3 | Levy | 51.28 | 0.928811 | 13.8018 | 0.982545 | 19.19031 | 8.8 | 1991/07/08 | 2042/10/19 | MPC · JPL |
| C/1998 G1 | LINEAR | 42.08 | 0.8237 | 12.099 | 2.1333 | 109.714 | 10.8 | 1998/11/16 | 2040/12/15 | MPC · JPL |
| C/1998 Y1 | LINEAR | 110 | 0.9239 | 22.956 | 1.74699 | 28.1082 | 14 | 1998/11/21 | 2108/11/15 | MPC · JPL |
| C/1999 E1 | Li | 66.06 | 0.76011 | 16.341 | 3.92002 | 46.88108 | 8.3 | 1998/01/31 | 2065/02/21 | MPC · JPL |
| C/1999 G1 | LINEAR | 149 | 0.856 | 28.1 | 4.048 | 76.55 | 8 | 1998/08/01 | 2150 | MPC · JPL |
| C/1999 K4 | LINEAR | 70 | 0.92 | 20 | 1.442 | 120.8 | 18.5 | 1999/05/16 | 2069/06/08 | MPC · JPL |
| C/1999 S3 | LINEAR | 82.43 | 0.89995 | 18.94 | 1.894939 | 70.5607 | 4.9 | 1999/11/09 | 2081/04/04 | MPC · JPL |
| C/1999 XS87 | LINEAR (*JFC) | 72.5 | 0.84057 | 17.386 | 2.7718 | 14.8464 | 10.9 | 1999/08/06 | 2072/02/04 | MPC · JPL |
| C/2000 D2 | LINEAR | 72 | 0.867 | 17.2 | 2.2975 | 156.992 | 13.7 | 2000/03/08 | 2072 | MPC · JPL |
| C/2000 G2 | LINEAR | 52 | 0.805 | 14 | 2.716 | 170.4785 | 12.8 | 2000/02/05 | 2052 | MPC · JPL |
| C/2000 S3 | LONEOS (*JFC) | 39.97 | 0.7723 | 11.69 | 2.6622 | 25.164 | 6.4 | 2000/07/16 | 2040/07/10 | MPC · JPL |
| C/2001 M10 | NEAT (*JFC) | 137.63 | 0.80107 | 26.657 | 5.30275 | 28.08349 | 9.4 | 2001/06/21 | 2139/02/01 | MPC · JPL |
| C/2001 OG108 | LONEOS | 48.5 | 0.9252595 | 13.3 | 0.9940479 | 80.24505 | 13.2 | 2002/03/15 | 2050/09/13 | MPC · JPL |
| C/2001 W2 | BATTeRS | 75.89 | 0.94136 | 17.925 | 1.051065 | 115.9131 | 12.1 | 2001/12/23 | 2077/11/15 | MPC · JPL |
| C/2002 A1 | LINEAR (*JFC) | 70.04 | 0.72281 | 16.992 | 4.70996 | 14.03393 | 8.6 | 2001/11/26 | 2071/12/11 | MPC · JPL |
| C/2002 A2 | LINEAR (*JFC) | 70.74 | 0.72482 | 17.103 | 4.70659 | 14.0386 | 7.5 | 2001/12/05 | 2072/09/01 | MPC · JPL |
| C/2002 B1 | LINEAR | 31.24 | 0.77102 | 9.9183 | 2.27113 | 51.0214 | 6.3 | 2002/04/20 | 2032/06/17 | MPC · JPL |
| C/2002 CE10 | LINEAR | 30.75 | 0.791486 | 9.81595 | 2.0467593 | 145.4587 | 10.8 | 2003/06/22 | 2034/03/23 | MPC · JPL |
| C/2002 K4 | NEAT | 73.41 | 0.84232 | 17.532 | 2.76453 | 94.0632 | 11.4 | 2002/07/12 | 2075/12/01 | MPC · JPL |
| C/2003 E1 | NEAT (*JFC) | 50.86 | 0.76359 | 13.7263 | 3.245004 | 33.53785 | 10.6 | 2004/02/13 | 2054/12/24 | MPC · JPL |
| C/2003 F1 | LINEAR | 93.93 | 0.80605 | 20.664 | 4.007806 | 70.2216 | 8.3 | 2003/06/28 | 2097/06/02 | MPC · JPL |
| P/2003 QX29 | NEAT (*JFC) | 22.74 | 0.4718 | 8.0255 | 4.239 | 11.3965 | 6.1 | 2002/10/26 | 2025/07/21 | MPC · JPL |
| C/2003 R1 | LINEAR | 87.44 | 0.89331 | 19.7 | 2.10188 | 149.19563 | 12.7 | 2003/06/29 | 2090/12/15 | MPC · JPL |
| C/2003 U1 | LINEAR | 109.6 | 0.9216 | 22.9 | 1.79572 | 164.4745 | 15.2 | 2003/11/03 | 2113 | MPC · JPL |
| C/2003 W1 | LINEAR | 126.1 | 0.93429 | 25.15 | 1.65241 | 78.0756 | 13.5 | 2003/11/09 | 2130 | MPC · JPL |
| C/2004 C1 | Larsen (*JFC) | 39.33 | 0.6231 | 11.566 | 4.3594 | 28.918 | 10 | 2003/03/19 | 2042/09/01 | MPC · JPL |
| P/2004 V5-A | LINEAR–Hill (*JFC) | 22.42 | 0.445217 | 7.95059 | 4.410853 | 19.358136 | 8.8 | 2005/02/28 | 2027/07/31 | MPC · JPL |
| P/2004 V5-B | LINEAR–Hill (*JFC) | 22.42 | 0.445233 | 7.95092 | 4.41091 | 19.35822 | 9.2 | 2005/03/01 | 2027/08/02 | MPC · JPL |
| C/2005 N5 | Catalina | 153.65 | 0.94327 | 28.687 | 1.6274 | 21.37879 | 12.9 | 2005/08/22 | 2159/01/01 | MPC · JPL |
| C/2005 O2 | Christensen | 115.43 | 0.85939 | 23.707 | 3.33358 | 148.89204 | 5.2 | 2005/09/08 | 2121/02/15 | MPC · JPL |
| P/2005 S2 | Skiff (*CTC) | 22.48 | 0.1967 | 7.965 | 6.398 | 3.141 | 7.9 | 2006/06/30 | 2028/12/22 | MPC · JPL |
| P/2005 T3 | Read (*CTC) | 20.58 | 0.174 | 7.509 | 6.202 | 6.26 | 9.2 | 2006/01/13 | 2026/08/15 | MPC · JPL |
| P/2005 T4 | SWAN | 28.4 | 0.93 | 9.3 | 0.649399 | 160.0362 | 15.4 | 2005/10/10 | 2034 | MPC · JPL |
| C/2005 W2 | Christensen (*JFC) | 82.68 | 0.82446 | 18.979 | 3.33162 | 11.26403 | 10.8 | 2006/03/27 | 2096/12/01 | MPC · JPL |
| C/2006 F2 | Christensen (*JFC) | 43.27 | 0.65138 | 12.324 | 4.2965 | 20.511 | 10.6 | 2006/05/30 | 2049/09/06 | MPC · JPL |
| P/2006 HR30 | Siding Spring | 21.86 | 0.8431184 | 7.81754 | 1.2264277 | 31.884499 | 11.7 | 2007/01/02 | 2028/11/12 | MPC · JPL |
| C/2006 U7 | Gibbs (*JFC) | 41.51 | 0.6309 | 11.99 | 4.425 | 57.762 | 11.6 | 2007/03/28 | 2048/10/01 | MPC · JPL |
| C/2007 S2 | Lemmon (*JFC) | 44.45 | 0.557056 | 12.5477 | 5.557931 | 16.86305 | 9 | 2008/09/14 | 2053/02/25 | MPC · JPL |
| C/2008 E1 | Catalina (*JFC) | 34.94 | 0.54815 | 10.687 | 4.82891 | 35.03769 | 9.1 | 2008/08/11 | 2043/07/31 | MPC · JPL |
| P/2008 O3 | Boattini (*JFC) | 23.42 | 0.6949 | 8.186 | 2.4973 | 32.2699 | 5.1 | 2008/06/03 | 2031/11/03 | MPC · JPL |
| C/2008 R3 | LINEAR | 79.11 | 0.89641 | 18.428 | 1.909035 | 43.23793 | 13.5 | 2008/11/22 | 2088/01/01 | MPC · JPL |
| P/2008 Y3 | McNaught (*JFC) | 22.75 | 0.44766 | 8.0281 | 4.434241 | 38.81318 | 8.7 | 2009/01/11 | 2031/10/12 | MPC · JPL |
| P/2009 O3 | Hill (*JFC) | 21.89 | 0.68688 | 7.8244 | 2.44999 | 16.2176 | 12 | 2009/05/18 | 2031/04/08 | MPC · JPL |
| P/2009 Q5 | McNaught (*JFC) | 20.4 | 0.609061 | 7.4654 | 2.91851 | 40.9048 | 10.5 | 2009/09/08 | 2030/02/02 | MPC · JPL |
| P/2009 T2 | La Sagra (*JFC) | 20.94 | 0.768991 | 7.596 | 1.75475 | 28.10639 | 14.2 | 2010/01/12 | 2030/12/21 | MPC · JPL |
| P/2010 E2 | Jarnac (*JFC) | 25.4 | 0.72237 | 8.6402 | 2.39874 | 15.437 | 14.4 | 2010/04/07 | 2035/08/31 | MPC · JPL |
| C/2010 E5 | Scotti (*JFC) | 122.96 | 0.84274 | 24.73 | 3.8884 | 18.9102 | 6.1 | 2009/11/21 | 2132/11/01 | MPC · JPL |
| P/2010 J3 | McMillan (*JFC) | 26.94 | 0.72682 | 8.9871 | 2.45511 | 13.25507 | 11.6 | 2010/08/23 | 2037/08/01 | MPC · JPL |
| P/2010 JC81 | WISE | 23.19 | 0.77735 | 8.13307 | 1.8108311 | 38.69025 | 10.3 | 2011/04/26 | 2034/07/04 | MPC · JPL |
| C/2010 L5 | WISE | 23.6 | 0.904 | 8.2 | 0.7909 | 147.052 | 17.4 | 2010/04/23 | 2033 | MPC · JPL |
| C/2011 J3 | LINEAR | 86.5 | 0.9258 | 19.56 | 1.451 | 114.7124 | 13.1 | 2011/01/24 | 2097 | MPC · JPL |
| P/2011 JB15 | Spacewatch–Boattini | 20 | 0.31874 | 7.3668 | 5.01871 | 19.14127 | 5.5 | 2012/01/21 | 2032/01/21 | MPC · JPL |
| C/2011 L1 | McNaught | 36.66 | 0.79678 | 11.034 | 2.24237 | 65.512 | 10.6 | 2010/12/18 | 2047/08/15 | MPC · JPL |
| P/2011 P1 | McNaught (*JFC) | 21.54 | 0.3598 | 7.741 | 4.9556 | 6.1741 | 8.2 | 2010/07/22 | 2032/02/04 | MPC · JPL |
| C/2011 P2 | PANSTARRS (*CTC) | 30.47 | 0.36982 | 9.7562 | 6.1481 | 8.98964 | 6.7 | 2010/09/13 | 2041/03/04 | MPC · JPL |
| P/2011 S1 | Gibbs (*CTC) | 25.46 | 0.20305 | 8.6545 | 6.8972 | 2.6792 | 5.5 | 2014/08/20 | 2040/02/04 | MPC · JPL |
| C/2011 S2 | Kowalski | 65.83 | 0.9316 | 16.304 | 1.115118 | 17.57253 | 14.8 | 2011/10/26 | 2077/08/25 | MPC · JPL |
| C/2011 Y3 | Boattini (*JFC) | 40.82 | 0.705 | 11.85 | 3.4978 | 26.517 | 11.7 | 2011/08/22 | 2052/06/17 | MPC · JPL |
| C/2012 BJ98 | Lemmon[1] (*JFC) | 70.52 | 0.87365 | 17.068 | 2.156577 | 2.6369 | 8.1 | 2012/09/20 | 2083/03/29 | MPC · JPL |
| P/2012 C3 | PANSTARRS (*JFC) | 30.2 | 0.6264 | 9.7 | 3.625 | 9.19 | 13.5 | 2011/10/05 | 2042 | MPC · JPL |
| C/2012 H2 | McNaught | 64.9 | 0.8936 | 16.14 | 1.71678 | 92.8355 | 15.7 | 2012/05/03 | 2077 | MPC · JPL |
| P/2012 NJ | La Sagra | 24.79 | 0.848062 | 8.5027 | 1.2918901 | 84.37546 | 13.1 | 2012/06/13 | 2037/03/28 | MPC · JPL |
| C/2012 Q1 | Kowalski (*JFC) | 133.63 | 0.63722 | 26.138 | 9.48222 | 45.181 | 4.7 | 2012/02/09 | 2145/10/01 | MPC · JPL |
| C/2012 T6 | Kowalski | 54.38 | 0.87634 | 14.354 | 1.77509 | 33.2755 | 15.7 | 2012/08/26 | 2067/01/15 | MPC · JPL |
| C/2012 X2 | PANSTARRS (*JFC) | 94.12 | 0.77052 | 20.69 | 4.74816 | 34.12389 | 9.6 | 2013/03/31 | 2107/05/14 | MPC · JPL |
| C/2012 Y3 | McNaught | 159.3 | 0.93993 | 29.38 | 1.76482 | 73.2318 | 10.4 | 2012/08/25 | 2172 | MPC · JPL |
| C/2013 C2 | Tenagra (*CTC) | 64.01 | 0.4293 | 16.001 | 9.1321 | 21.34426 | 4.4 | 2015/08/28 | 2080/09/01 | MPC · JPL |
| C/2013 D1 | Holvorcem (*JFC) | 37.62 | 0.78088 | 11.227 | 2.46013 | 10.09356 | 13.5 | 2013/04/13 | 2050/11/25 | MPC · JPL |
| P/2013 N3 | PANSTARRS (*JFC) | 20.26 | 0.5924 | 7.431 | 3.0289 | 2.17041 | 6.6 | 2014/02/11 | 2034/05/17 | MPC · JPL |
| P/2013 P1 | PANSTARRS (*JFC) | 25.17 | 0.6053 | 8.588 | 3.3902 | 18.702 | 11.6 | 2013/02/26 | 2038/04/29 | MPC · JPL |
| C/2013 P4 | PANSTARRS (*CTC) | 56.84 | 0.59636 | 14.783 | 5.96703 | 4.26425 | 5.1 | 2014/08/12 | 2071/06/15 | MPC · JPL |
| C/2013 U1 | Catalina (*JFC) | 41.17 | 0.7971 | 11.92 | 2.4188 | 23.9415 | 13.9 | 2013/11/18 | 2055/01/01 | MPC · JPL |
| C/2013 V3 | Nevsky | 45.36 | 0.89097 | 12.718 | 1.386693 | 32.1345 | 15.2 | 2013/10/29 | 2059/03/09 | MPC · JPL |
| C/2013 W2 | PANSTARRS (*JFC) | 32.23 | 0.561 | 10.13 | 4.448 | 4.5436 | 5.8 | 2015/01/08 | 2047/03/15 | MPC · JPL |
| C/2014 F3 | Sheppard–Trujillo (*JFC) | 66 | 0.65 | 16.3 | 5.7 | 6.48 | 6.1 | 2021/04/17 | 2087 | MPC · JPL |
| C/2014 HU195 | Valdes–TOTAS (*JFC) | 102.25 | 0.76580 | 21.867 | 5.12113 | 5.82227 | 14.6 | 2015/05/18 | 2117/08/14 | MPC · JPL |
| C/2014 J1 | Catalina | 25.4 | 0.802 | 8.64 | 1.7085 | 159.696 | 16.8 | 2014/06/20 | 2039 | MPC · JPL |
| P/2014 L3 | Hill (*JFC) | 23.36 | 0.77309 | 8.1706 | 1.85396 | 6.264 | 13.7 | 2014/06/28 | 2037/11/06 | MPC · JPL |
| P/2014 O3 | PANSTARRS (*JFC) | 20.72 | 0.3847 | 7.544 | 4.642 | 7.81 | 10.4 | 2014/04/16 | 2035/01/04 | MPC · JPL |
| C/2014 Q3 | Borisov | 151.64 | 0.94207 | 28.436 | 1.647408 | 89.94888 | 8.8 | 2014/11/19 | 2166/07/10 | MPC · JPL |
| C/2014 TG64 | Catalina (*JFC) | 22.283 | 0.7824 | 14.89 | 3.24 | 3.2391 | 6.4 | 2014/05/26 | 2072 | MPC · JPL |
| C/2014 W7 | Christensen | 38 | 0.869 | 11.3 | 1.4881 | 98.314 | 16.3 | 2014/12/31 | 2052 | MPC · JPL |
| C/2014 W9 | PANSTARRS | 37.28 | 0.8577 | 11.16 | 1.5874 | 10.6302 | 15.5 | 2015/02/15 | 2052/04/01 | MPC · JPL |
| C/2014 W11 | PANSTARRS (*JFC) | 30.67 | 0.650255 | 9.7980 | 3.426805 | 12.70679 | 8.8 | 2015/06/17 | 2036/04/16 | MPC · JPL |
| C/2015 A1 | PANSTARRS | 90.24 | 0.900816 | 20.119 | 1.995505 | 80.36576 | 6.9 | 2015/03/13 | 2105/06/09 | MPC · JPL |
| P/2015 A3 | PANSTARRS | 21 | 0.85 | 7.6 | 1.154 | 172.51 | 20.2 | 2015/02/22 | 2036 | MPC · JPL |
| P/2015 B1 | PANSTARRS (*JFC) | 30.10 | 0.38250 | 9.6772 | 5.97567 | 18.027 | 8.7 | 2015/09/19 | 2045/10/26 | MPC · JPL |
| P/2015 B4 | Lemmon–PANSTARRS (*JFC) | 25.72 | 0.56894 | 8.7121 | 3.75540 | 1.74262 | 11.7 | 2015/02/17 | 2030/12/04 | MPC · JPL |
| C/2015 D2 | PANSTARRS (*JFC) | 46.79 | 0.56826 | 12.985 | 5.6060 | 31.8339 | 6.3 | 2013/09/27 | 2060/07/13 | MPC · JPL |
| C/2015 D5 | Kowalski (*JFC) | 27.66 | 0.4996 | 9.145 | 4.576 | 20.3990 | 6.0 | 2014/04/16 | 2041/12/12 | MPC · JPL |
| C/2015 F5 | SWAN–XingMing | 60.9 | 0.97764 | 15.47 | 0.345995 | 149.2590 | 17.6 | 2015/03/28 | 2075/02/01 | MPC · JPL |
| C/2015 GX | PANSTARRS | 65.13 | 0.878198 | 16.1883 | 1.971753 | 90.25454 | 14.4 | 2015/08/26 | 2080/10/09 | MPC · JPL |
| C/2015 H1 | Bressi | 185.5 | 0.94078 | 32.53 | 1.92636 | 140.65558 | 6.6 | 2015/03/28 | 2200/10/07 | MPC · JPL |
| P/2015 Q2 | Pimentel | 20.16 | 0.7544 | 7.407 | 1.81912 | 146.2022 | 15.3 | 2015/09/10 | 2035/11/06 | MPC · JPL |
| C/2015 T5 | Sheppard–Tholen (*CTC) | 147.9 | 0.6661 | 27.97 | 9.3383 | 11.0483 | 7.7 | 2016/01/24 | 2164 | MPC · JPL |
| C/2015 V4 | PANSTARRS | 79.89 | 0.70567 | 18.550 | 5.45972 | 60.7513 | 8.7 | 2016/08/27 | 2096/07/19 | MPC · JPL |
| C/2015 X2 | PANSTARRS | 62.5 | 0.8791 | 15.75 | 1.90456 | 72.458 | 16.1 | 2015/12/20 | 2078/06/25 | MPC · JPL |
| C/2015 X4 | Elenin (*JFC) | 77.23 | 0.812807 | 18.1345 | 3.39466 | 29.50491 | 10.1 | 2015/11/03 | 2093/02/14 | MPC · JPL |
| C/2015 X8 | NEOWISE | 86.9 | 0.9393 | 19.6 | 1.1903 | 155.2817 | 14.1 | 2015/10/23 | 2099/09/13 | MPC · JPL |
| C/2015 YG1 | NEOWISE | 71.14 | 0.87924 | 17.169 | 2.07341 | 57.3360 | 12.3 | 2015/09/28 | 2086/11/17 | MPC · JPL |
| P/2016 A3 | PANSTARRS (*JFC) | 21.36 | 0.3778 | 7.6979 | 4.7895 | 8.5929 | 5.4 | 2017/04/13 | 2038/08/22 | MPC · JPL |
| C/2016 Q4 | Kowalski (*CTC) | 68.8 | 0.5781 | 16.79 | 7.084 | 7.2567 | 7.0 | 2018/01/28 | 2086 | MPC · JPL |
| C/2016 S1 | PANSTARRS | 23.85 | 0.70887 | 8.285 | 2.41193 | 94.6898 | 7.5 | 2017/03/16 | 2041/01/20 | MPC · JPL |
| P/2016 WM48 | Lemmon | 23.46 | 0.7867 | 8.1954 | 1.7480 | 117.5476 | 16.8 | 2017/02/26 | 2040 | MPC · JPL |
| C/2017 C1 | NEOWISE | 92.08 | 0.9263697 | 20.7832 | 1.50172 | 65.73154 | 2017/01/19 | 2109 | MPC · JPL | |
| P/2017 D4 | PANSTARRS (*JFC) | 20.23 | 0.62898 | 7.424 | 2.7545 | 10.3396 | 12.7 | 2016/09/06 | 2036/11/29 | MPC · JPL |
| C/2017 E2 | Tsuchinshan | 100.09 | 0.89085 | 21.5567 | 2.35295 | 79.1686 | 11.3 | 2016/05/12 | 2116/06/14 | MPC · JPL |
| P/2017 G1 | PANSTARRS (*JFC) | 21.53 | 0.66134 | 7.7387 | 2.621 | 3.534 | 13.1 | 2016/05/14 | 2037/11/23 | MPC · JPL |
| P/2017 G2 | PANSTARRS | 23.22 | 0.65031 | 8.1394 | 2.846 | 47.90625 | 12.9 | 2017/06/13 | 2040/09/02 | MPC · JPL |
| C/2017 K4 | ATLAS (*JFC) | 148.87 | 0.90571 | 28.0883 | 2.64824 | 16.67822 | 7.2 | 2018/01/08 | 2167 | MPC · JPL |
| P/2017 P1 | PANSTARRS (*JFC) | 22.06 | 0.3088 | 7.86566 | 5.43665 | 7.7013 | 10.1 | 2018/06/18 | 2040/07/10 | MPC · JPL |
| C/2017 S2 | PANSTARRS (*JFC) | 93.09 | 0.82406 | 20.5400 | 3.613 | 12.67723 | 13.2 | 2017/08/28 | 2110 | MPC · JPL |
| C/2017 U5 | PANSTARRS (*JFC) | 69.72 | 0.74457 | 16.939 | 4.32676 | 18.9566 | 11.8 | 2017/12/19 | 2087/09/07 | MPC · JPL |
| C/2017 W2 | Leonard | 50.81 | 0.7115 | 13.7176 | 3.958 | 98.1831 | 10.9 | 2017/11/02 | 2068 | MPC · JPL |
| P/2017 W3 | Gibbs (*JFC) | 21.51 | 0.5039 | 7.734 | 3.8373 | 18.317 | 10.5 | 2018/02/25 | 2039/08/30 | MPC · JPL |
| C/2017 X1 | PANSTARRS (*JFC) | 175.19 | 0.8511 | 31.3092 | 4.6624 | 31.3106 | 9.6 | 2018/06/14 | 2193 | MPC · JPL |
| P/2017 Y3 | Leonard | 30.86 | 0.8703 | 9.838 | 1.2753 | 27.5859 | 13.6 | 2018/02/11 | 2049 | MPC · JPL |
| C/2018 A1 | PANSTARRS | 131.18 | 0.9061 | 25.8169 | 2.4233 | 53.6213 | 13.1 | 2017/10/20 | 2148 | MPC · JPL |
| C/2018 A6 | Gibbs | 72.80 | 0.8273 | 17.434 | 3.011 | 77.454 | 8.9 | 2019/07/08 | 2092 | MPC · JPL |
| C/2018 DO4 | Lemmon | 131.40 | 0.9069 | 29.847 | 2.406 | 160.475 | 13.7 | 2019/08/18 | 2151 | MPC · JPL |
| C/2018 K1 | Weiland | 163.42 | 0.9371 | 29.890 | 1.879 | 164.193 | 11.9 | 2018/04/06 | 2182 | MPC · JPL |
| C/2018 M1 | CSS | 103.81 | 0.9409 | 22.087 | 1.304 | 37.265 | 15.9 | 2018/07/10 | 2122 | MPC · JPL |
| C/2018 O1 | ATLAS | 147.09 | 0.944 | 27.864 | 1.558 | 154.041 | 12.6 | 2018/08/31 | 2165 | MPC · JPL |
| C/2018 R5 | Lemmon | 109.55 | 0.8418 | 22.8947 | 3.6213 | 103.76 | 6 | 2019/01/09 | 2128 | MPC · JPL |
| C/2018 S2 | TESS | 53.55 | 0.6149 | 14.206 | 5.471 | 64.220 | 6.7 | 2018/11/05 | 2072 | MPC · JPL |
| C/2018 V2 | ATLAS | 129.65 | 0.9034 | 25.616 | 2.475 | 159.111 | 14.5 | 2018/11/26 | 2148 | MPC · JPL |
| C/2018 W1 | CSS | 101.64 | 0.938 | 21.779 | 1.36 | 83.273 | 15.648 | 2019/05/11 | 2120 | MPC · JPL |
| C/2018 X3 | PANSTARRS | 43.75 | 0.783 | 12.41686 | 2.69887 | 43.368 | 15.5 | 2018/12/30 | 2062 | MPC · JPL |
| P/2018 Y2 | Africano (*JFC) | 20.72 | 0.4878 | 7.543 | 3.8635 | 11.48886 | 11 | 2018/12/13 | 2039 | MPC · JPL |
| C/2019 A5 | PANSTARRS | 100.81 | 0.7080 | 21.6608 | 6.3242 | 67.5310 | 9.4 | 2019/06/09 | 2119 | MPC · JPL |
| C/2019 L1 | PANSTARRS (*JFC) | 30.90 | 0.7065 | 9.8474 | 2.88986 | 9.993 | 13.6 | 2019/08/11 | 2050 | MPC · JPL |
| C/2019 L2 | NEOWISE | 130.48 | 0.9370 | 25.72 | 1.622 | 152.19 | 10.3 | 2019/04/02 | 2149 | MPC · JPL |
| C/2019 LB7 | Kleyna | 208.14 | 0.9293 | 35.1204 | 2.483 | 164.23 | 18.1 | 2019/03/27 | 2227 | MPC · JPL |
| C/2019 T5 | ATLAS | 22.69 | 0.8092 | 8.014 | 1.5289 | 33.42 | 14.9 | 2019/08/01 | 2042 | MPC · JPL |
| P/2019 V2 | Groeller (*JFC) | 20.63 | 0.333 | 7.523 | 5.0183 | 11.8 | 9.8 | 2020/10/21 | 2041 | MPC · JPL |
| C/2019 Y4-D | ATLAS | 111.65 | 0.9888 | 23.187 | 0.2589 | 44.02 | 14.5 | 2020/05/31 | 2132 | MPC · JPL |
| C/2019 Y4-E | ATLAS | 87.94 | 0.987 | 19.775 | 0.2525 | 45.085 | 16.3 | 2020/05/31 | 2108 | MPC · JPL |
| P/2020 A4 | PANSTARRS-Lemmon (*JFC) | 23.52 | 0.6537 | 8.208 | 2.843 | 24.99 | 15.6 | 2019/11/22 | 2043 | MPC · JPL |
| C/2020 M3 | ATLAS | 138.88 | 0.9527 | 26.817 | 1.268 | 23.474 | 14.6 | 2020/10/25 | 2159 | MPC · JPL |
| C/2020 Q2 | PANSTARRS (*JFC) | 36.10 | 0.5055 | 10.9231 | 5.402 | 3.310 | 10.9 | 2020/02/07 | 2056 | MPC · JPL |
| C/2020 S2 | PANSTARRS | 32.48 | 0.8275 | 10.1793 | 1.756 | 22.3978 | 16.3 | 2020/12/21 | 2052 | MPC · JPL |
| P/2020 V3 | PANSTARRS (*JFC) | 24.17 | 0.2547 | 8.36 | 6.23 | 23.035 | 8.6 | 2021/02/07 | 2045 | MPC · JPL |
| P/2020 V4 | Rankin (*JFC) | 28.52 | 0.4484 | 9.3336 | 5.15 | 14.245 | 6.9 | 2021/07/18 | 2050 | MPC · JPL |
| P/2021 C2 | PANSTARRS (*JFC) | 29.47 | 0.4874 | 9.5408 | 4.890 | 21.927 | 11.4 | 2021/02/24 | 2050 | MPC · JPL |
| C/2021 J1 | Maury-Attard | 134.85 | 0.9338 | 26.296 | 1.74 | 92.710 | 13.4 | 2021/02/19 | 2155 | MPC · JPL |
| P/2021 J3 | ATLAS (*JFC) | 26.69 | 0.4507 | 8.931 | 4.890 | 14.573 | 6.9 | 2019/07/03 | 2046 | MPC · JPL |
| C/2021 K1 | ATLAS (*JFC) | 45.50 | 0.8040 | 12.745 | 2.498 | 16.276 | 6.2 | 2021/05/04 | 2066 | MPC · JPL |
| P/2021 R1 | PANSTARRS (*JFC) | 24.64 | 0.4229 | 8.467 | 4.886 | 5.520 | 7.4 | 2021/12/16 | 2046 | MPC · JPL |
| P/2021 U1 | Wierzchos | 24.83 | 0.7127 | 8.511 | 2.445 | 30.560 | 16.1 | 2021/09/30 | 2046 | MPC · JPL |
| P/2021 V2 | Fuls (*JFC) | 27.15 | 0.6130 | 9.034 | 3.500 | 12.696 | 7.0 | 2023/01/21 | 2050 | MPC · JPL |
| C/2022 F2 | NEOWISE | 117.13 | 0.934 | 23.939 | 1.585 | 97.293 | 15.8 | 2022/03/23 | 2139 | MPC · JPL |
| C/2022 P1 | NEOWISE | 79.30 | 0.9136 | 18.458 | 1.595 | 154.607 | 10.0 | 2022/11/28 | 2102 | MPC · JPL |
| C/2022 Q2 | ATLAS | 187.51 | 0.9498 | 32.760 | 1.644 | 151.49 | 13.9 | 2023/01/31 | 2210 | MPC · JPL |
| C/2022 S5 | PANSTARRS | 92.51 | 0.8935 | 20.454 | 2.179 | 136.53 | 12.8 | 2022/11/27 | 2115 | MPC · JPL |
| P/2022 Y1 | Hogan | 44.43 | 0.764 | 12.545 | 2.958 | 18.859 | 13.3 | 2022/11/27 | 2067 | MPC · JPL |
| C/2022 Y2 | Lemmon | 87.14 | 0.871 | 19.655 | 2.545 | 165.907 | 7.5 | 2023/03/22 | 2110 | MPC · JPL |
| C/2023 E1 | ATLAS | 85.02 | 0.947 | 19.334 | 1.027 | 38.313 | 16.2 | 2023/07/01 | 2108 | MPC · JPL |
| C/2023 H3 | PANSTARRS | 50.39 | 0.616 | 13.642 | 5.233 | 2.489 | 7.2 | 2024/02/19 | 2074 | MPC · JPL |
| C/2023 RN3 | ATLAS (*JFC) | 32.32 | 0.490 | 10.147 | 5.172 | 10.358 | 7.4 | 2023/01/17 | 2055 | MPC · JPL |
| C/2023 S3 | Lemmon | 152.38 | 0.971 | 28.529 | 0.83 | 140.498 | 16.7 | 2024/01/19 | 2164 | MPC · JPL |
| C/2023 V3 | PANSTARRS | 48.17 | 0.662 | 13.239 | 4.472 | 40.259 | 11.6 | 2023/08/06 | 2071 | MPC · JPL |
| C/2023 X4 | Hogan (*JFC) | 31.20 | 0.631 | 9.911 | 3.658 | 11.595 | 11.6 | 2024/05/24 | 2055 | MPC · JPL |
| C/2024 A2 | ATLAS | 183.67 | 0.942 | 32.31 | 1.882 | 119.11 | 14.6 | 2024/04/28 | 2208 | MPC · JPL |
| C/2024 C1 | PANSTARRS (*JFC) | 34.28 | 0.582 | 10.55 | 4.413 | 14.22 | 7.6 | 2024/08/30 | 2058 | MPC · JPL |
| C/2024 C2 | PANSTARRS (*CTC) | 65.04 | 0.444 | 16.17 | 8.99 | 27.28 | 6.2 | 2025/03/11 | 2090 | MPC · JPL |
| C/2024 C3 | PANSTARRS (*JFC) | 39.70 | 0.423 | 12.64 | 6.712 | 22.47 | 9.1 | 2023/11/08 | 2073 | MPC · JPL |
| C/2024 F2 | PANSTARRS (*JFC) | 31.08 | 0.5996 | 9.885 | 3.958 | 13.74 | 11.2 | 2024/08/03 | 2055 | MPC · JPL |
| C/2024 L1 | PANSTARRS | 38.77 | 0.533 | 11.454 | 5.348 | 99.17 | 10.0 | 2025/04/11 | 2064 | MPC · JPL |
| C/2024 M1 | ATLAS | 162.89 | 0.943 | 29.83 | 1.703 | 73.71 | 14.2 | 2024/11/20 | 2187 | MPC · JPL |
| C/2024 O2 | PANSTARRS (*JFC) | 20.08 | 0.499 | 7.388 | 3.698 | 28.97 | 12.5 | 2024/04/20 | 2044 | MPC · JPL |
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See also
References
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