List of Halley-type comets

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.

Numbered HTCs

For the 14 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 Comet name Eccentricity Semimajor axis (AU) Period (years) Inclination (°) Perihelion distance (AU) Absolute magnitude Last perihelion Next perihelion Ref
C/1917 F1Mellish0.99312127.647332514532.68280.1901861917/04/112062MPC · JPL
C/1921 H1Dubiago0.8682222.111.10081921/05/042031MPC · JPL
C/1937 D1Wilk0.98109832.744524418726.02050.6189371937/02/212124MPC · JPL
C/1942 EAVäisälä0.93363919.395111685.437.99611.2870791942/02/152027/07/10MPC · JPL
C/1984 A1Bradfield 10.952428.5152.351.80051.357519.61983/12/272136/04/01MPC · JPL
C/1989 A3Bradfield0.97770818.85381.983.06720.4202711988/12/052070/11/01MPC · JPL
C/1991 L3Levy0.92881113.801851.2819.190310.9825458.81991/07/082042/10/19MPC · JPL
P/1997 B1Kobayashi (*JFC)0.760768.58825.1712.34952.0545512.31997/03/022022/06/06MPC · JPL
C/1998 G1LINEAR0.823712.09942.08109.7142.133310.81998/11/162040/12/15MPC · JPL
C/1998 Y1LINEAR0.923922.95611028.10821.74699141998/11/212108/11/15MPC · JPL
C/1999 E1Li0.7601116.34166.0646.881083.920028.31998/01/312065/02/21MPC · JPL
C/1999 G1LINEAR0.85628.114976.554.04881998/08/012150MPC · JPL
C/1999 K4LINEAR0.922070120.81.44218.51999/05/162069/06/08MPC · JPL
C/1999 S3LINEAR0.8999518.9482.4370.56071.8949394.91999/11/092081/04/04MPC · JPL
C/1999 XS87LINEAR (*JFC)0.8405717.38672.514.84642.771810.91999/08/062072/02/04MPC · JPL
C/2000 D2LINEAR0.86717.272156.9922.297513.72000/03/082072MPC · JPL
C/2000 G2LINEAR0.8051452170.47852.71612.82000/02/052052MPC · JPL
C/2000 S3LONEOS (*JFC)0.772311.6939.9725.1642.66226.42000/07/162040/07/10MPC · JPL
C/2001 M10NEAT (*JFC)0.8010726.657137.6328.083495.302759.42001/06/212139/02/01MPC · JPL
C/2001 OG108LONEOS0.925259513.348.580.245050.994047913.22002/03/152050/09/13MPC · JPL
P/2001 Q6NEAT0.823867.994622.6156.85531.40817913.32001/11/092024/06/20MPC · JPL
C/2001 W2BATTeRS0.9413617.92575.89115.91311.05106512.12001/12/232077/11/15MPC · JPL
C/2002 A1LINEAR (*JFC)0.7228116.99270.0414.033934.709968.62001/11/262071/12/11MPC · JPL
C/2002 A2LINEAR (*JFC)0.7248217.10370.7414.03864.706597.52001/12/052072/09/01MPC · JPL
C/2002 B1LINEAR0.771029.918331.2451.02142.271136.32002/04/202032/06/17MPC · JPL
C/2002 CE10LINEAR0.7914869.8159530.75145.45872.046759310.82003/06/222034/03/23MPC · JPL
C/2002 K4NEAT0.8423217.53273.4194.06322.7645311.42002/07/122075/12/01MPC · JPL
P/2002 T6NEAT–LINEAR (*JFC)0.5573487.651921.1711.009273.3871035.92003/06/272024/08/28MPC · JPL
C/2003 E1NEAT (*JFC)0.7635913.726350.8633.537853.24500410.62004/02/132054/12/24MPC · JPL
C/2003 F1LINEAR0.8060520.66493.9370.22164.0078068.32003/06/282097/06/02MPC · JPL
P/2003 QX29NEAT (*JFC)0.47188.025522.7411.39654.2396.12002/10/262025/07/21MPC · JPL
C/2003 R1LINEAR0.8933119.787.44149.195632.1018812.72003/06/292090/12/15MPC · JPL
C/2003 U1LINEAR0.921622.9109.6164.47451.7957215.22003/11/032113MPC · JPL
C/2003 W1LINEAR0.9342925.15126.178.07561.6524113.52003/11/092130MPC · JPL
P/2004 A1LONEOS (*JFC)0.308417.8985322.210.575685.462544102004/08/262026/11/07MPC · JPL
C/2004 C1Larsen (*JFC)0.623111.56639.3328.9184.3594102003/03/192042/09/01MPC · JPL
P/2004 DO29SpacewatchLINEAR (*JFC)0.451517.465520.414.53584.0947510.32004/10/112025/03/06MPC · JPL
P/2004 V5-ALINEAR–Hill (*JFC)0.4452177.9505922.4219.3581364.4108538.82005/02/282027/07/31MPC · JPL
P/2004 V5-BLINEAR–Hill (*JFC)0.4452337.9509222.4219.358224.410919.22005/03/012027/08/02MPC · JPL
C/2005 N5Catalina0.9432728.687153.6521.378791.627412.92005/08/222159/01/01MPC · JPL
C/2005 O2Christensen0.8593923.707115.43148.892043.333585.22005/09/082121/02/15MPC · JPL
P/2005 S2Skiff (*CTC)0.19677.96522.483.1416.3987.92006/06/302028/12/22MPC · JPL
P/2005 T3Read (*CTC)0.1747.50920.586.266.2029.22006/01/132026/08/15MPC · JPL
P/2005 T4SWAN0.939.328.4160.03620.64939915.42005/10/102034MPC · JPL
C/2005 W2Christensen (*JFC)0.8244618.97982.6811.264033.3316210.82006/03/272096/12/01MPC · JPL
C/2006 F2Christensen (*JFC)0.6513812.32443.2720.5114.296510.62006/05/302049/09/06MPC · JPL
P/2006 HR30Siding Spring0.84311847.8175421.8631.8844991.226427711.72007/01/022028/11/12MPC · JPL
C/2006 U7Gibbs (*JFC)0.630911.9941.5157.7624.42511.62007/03/282048/10/01MPC · JPL
C/2007 S2Lemmon (*JFC)0.55705612.547744.4516.863055.55793192008/09/142053/02/25MPC · JPL
C/2008 E1Catalina (*JFC)0.5481510.68734.9435.037694.828919.12008/08/112043/07/31MPC · JPL
P/2008 O3Boattini (*JFC)0.69498.18623.4232.26992.49735.12008/06/032031/11/03MPC · JPL
C/2008 R3LINEAR0.8964118.42879.1143.237931.90903513.52008/11/222088/01/01MPC · JPL
P/2008 Y3McNaught (*JFC)0.447668.028122.7538.813184.4342418.72009/01/112031/10/12MPC · JPL
P/2009 O3Hill (*JFC)0.686887.824421.8916.21762.44999122009/05/182031/04/08MPC · JPL
P/2009 Q5McNaught (*JFC)0.6090617.465420.440.90482.9185110.52009/09/082030/02/02MPC · JPL
P/2009 T2La Sagra (*JFC)0.7689917.59620.9428.106391.7547514.22010/01/122030/12/21MPC · JPL
P/2010 E2Jarnac (*JFC)0.722378.640225.415.4372.3987414.42010/04/072035/08/31MPC · JPL
C/2010 E5Scotti (*JFC)0.8427424.73122.9618.91023.88846.12009/11/212132/11/01MPC · JPL
P/2010 J3McMillan (*JFC)0.726828.987126.9413.255072.4551111.62010/08/232037/08/01MPC · JPL
P/2010 JC81WISE0.777358.1330723.1938.690251.810831110.32011/04/262034/07/04MPC · JPL
C/2010 L5WISE0.9048.223.6147.0520.790917.42010/04/232033MPC · JPL
C/2011 J3LINEAR0.925819.5686.5114.71241.45113.12011/01/242097MPC · JPL
P/2011 JB15SpacewatchBoattini0.318747.36682019.141275.018715.52012/01/212032/01/21MPC · JPL
C/2011 L1McNaught0.7967811.03436.6665.5122.2423710.62010/12/182047/08/15MPC · JPL
P/2011 P1McNaught (*JFC)0.35987.74121.546.17414.95568.22010/07/222032/02/04MPC · JPL
C/2011 P2PANSTARRS (*CTC)0.369829.756230.478.989646.14816.72010/09/132041/03/04MPC · JPL
P/2011 S1Gibbs (*CTC)0.203058.654525.462.67926.89725.52014/08/202040/02/04MPC · JPL
C/2011 S2Kowalski0.931616.30465.8317.572531.11511814.82011/10/262077/08/25MPC · JPL
C/2011 Y3Boattini (*JFC)0.70511.8540.8226.5173.497811.72011/08/222052/06/17MPC · JPL
C/2012 BJ98Lemmon[1] (*JFC)0.8736517.06870.522.63692.1565778.12012/09/202083/03/29MPC · JPL
P/2012 C3PANSTARRS (*JFC)0.62649.730.29.193.62513.52011/10/052042MPC · JPL
C/2012 H2McNaught0.893616.1464.992.83551.7167815.72012/05/032077MPC · JPL
P/2012 NJLa Sagra0.8480628.502724.7984.375461.291890113.12012/06/132037/03/28MPC · JPL
C/2012 Q1Kowalski (*JFC)0.6372226.138133.6345.1819.482224.72012/02/092145/10/01MPC · JPL
C/2012 T6Kowalski0.8763414.35454.3833.27551.7750915.72012/08/262067/01/15MPC · JPL
C/2012 X2PANSTARRS (*JFC)0.7705220.6994.1234.123894.748169.62013/03/312107/05/14MPC · JPL
C/2012 Y3McNaught0.9399329.38159.373.23181.7648210.42012/08/252172MPC · JPL
C/2013 C2Tenagra (*CTC)0.429316.00164.0121.344269.13214.42015/08/282080/09/01MPC · JPL
C/2013 D1Holvorcem (*JFC)0.7808811.22737.6210.093562.4601313.52013/04/132050/11/25MPC · JPL
P/2013 N3PANSTARRS (*JFC)0.59247.43120.262.170413.02896.62014/02/112034/05/17MPC · JPL
P/2013 P1PANSTARRS (*JFC)0.60538.58825.1718.7023.390211.62013/02/262038/04/29MPC · JPL
C/2013 P4PANSTARRS (*CTC)0.5963614.78356.844.264255.967035.12014/08/122071/06/15MPC · JPL
C/2013 U1Catalina (*JFC)0.797111.9241.1723.94152.418813.92013/11/182055/01/01MPC · JPL
C/2013 V3Nevsky0.8909712.71845.3632.13451.38669315.22013/10/292059/03/09MPC · JPL
C/2013 W2PANSTARRS (*JFC)0.56110.1332.234.54364.4485.82015/01/082047/03/15MPC · JPL
C/2014 F3SheppardTrujillo (*JFC)0.6516.3666.485.76.12021/04/172087MPC · JPL
C/2014 HU195Valdes–TOTAS (*JFC)0.7658021.867102.255.822275.1211314.62015/05/182117/08/14MPC · JPL
C/2014 J1Catalina0.8028.6425.4159.6961.708516.82014/06/202039MPC · JPL
P/2014 L3Hill (*JFC)0.773098.170623.366.2641.8539613.72014/06/282037/11/06MPC · JPL
P/2014 O3PANSTARRS (*JFC)0.38477.54420.727.814.64210.42014/04/162035/01/04MPC · JPL
C/2014 Q3Borisov0.9420728.436151.6489.948881.6474088.82014/11/192166/07/10MPC · JPL
C/2014 TG64Catalina (*JFC)0.782414.8922.2833.23913.246.42014/05/262072MPC · JPL
C/2014 W7Christensen0.86911.33898.3141.488116.32014/12/312052MPC · JPL
C/2014 W9PANSTARRS0.857711.1637.2810.63021.587415.52015/02/152052/04/01MPC · JPL
C/2014 W11PANSTARRS (*JFC)0.6502559.798030.6712.706793.4268058.82015/06/172036/04/16MPC · JPL
C/2015 A1PANSTARRS0.90081620.11990.2480.365761.9955056.92015/03/132105/06/09MPC · JPL
P/2015 A3PANSTARRS0.857.621172.511.15420.22015/02/222036MPC · JPL
P/2015 B1PANSTARRS (*JFC)0.382509.677230.1018.0275.975678.72015/09/192045/10/26MPC · JPL
P/2015 B4Lemmon–PANSTARRS (*JFC)0.568948.712125.721.742623.7554011.72015/02/172030/12/04MPC · JPL
C/2015 D2PANSTARRS (*JFC)0.5682612.98546.7931.83395.60606.32013/09/272060/07/13MPC · JPL
C/2015 D5Kowalski (*JFC)0.49969.14527.6620.39904.5766.02014/04/162041/12/12MPC · JPL
C/2015 F5SWANXingMing0.9776415.4760.9149.25900.34599517.62015/03/282075/02/01MPC · JPL
C/2015 GXPANSTARRS0.87819816.188365.1390.254541.97175314.42015/08/262080/10/09MPC · JPL
C/2015 H1Bressi0.9407832.53185.5140.655581.926366.62015/03/282200/10/07MPC · JPL
P/2015 Q2Pimentel0.75447.40720.16146.20221.8191215.32015/09/102035/11/06MPC · JPL
C/2015 T5SheppardTholen (*CTC)0.666127.97147.911.04839.33837.72016/01/242164MPC · JPL
C/2015 V4PANSTARRS0.7056718.55079.8960.75135.459728.72016/08/272096/07/19MPC · JPL
C/2015 X2PANSTARRS0.879115.7562.572.4581.9045616.12015/12/202078/06/25MPC · JPL
C/2015 X4Elenin (*JFC)0.81280718.134577.2329.504913.3946610.12015/11/032093/02/14MPC · JPL
C/2015 X8NEOWISE0.939319.686.9155.28171.190314.12015/10/232099/09/13MPC · JPL
C/2015 YG1NEOWISE0.8792417.16971.1457.33602.0734112.32015/09/282086/11/17MPC · JPL
P/2016 A3PANSTARRS (*JFC)0.37787.697921.368.59294.78955.42017/04/132038/08/22MPC · JPL
C/2016 Q4Kowalski (*CTC)0.578116.7968.87.25677.0847.02018/01/282086MPC · JPL
C/2016 S1PANSTARRS0.708878.28523.8594.68982.411937.52017/03/162041/01/20MPC · JPL
P/2016 WM48Lemmon0.78678.195423.46117.54761.748016.82017/02/262040MPC · JPL
C/2017 C1NEOWISE0.926369720.783292.0865.731541.501722017/01/192109MPC · JPL
P/2017 D4PANSTARRS (*JFC)0.628987.42420.2310.33962.754512.72016/09/062036/11/29MPC · JPL
C/2017 E2Tsuchinshan0.8908521.5567100.0979.16862.3529511.32016/05/122116/06/14MPC · JPL
P/2017 G1PANSTARRS (*JFC)0.661347.738721.533.5342.62113.12016/05/142037/11/23MPC · JPL
P/2017 G2PANSTARRS0.650318.139423.2247.906252.84612.92017/06/132040/09/02MPC · JPL
C/2017 K4ATLAS (*JFC)0.9057128.0883148.8716.678222.648247.22018/01/082167MPC · JPL
P/2017 P1PANSTARRS (*JFC)0.30887.8656622.067.70135.4366510.12018/06/182040/07/10MPC · JPL
C/2017 S2PANSTARRS (*JFC)0.8240620.540093.0912.677233.61313.22017/08/282110MPC · JPL
C/2017 U5PANSTARRS (*JFC)0.7445716.93969.7218.95664.3267611.82017/12/192087/09/07MPC · JPL
C/2017 W2Leonard0.711513.717650.8198.18313.95810.92017/11/022068MPC · JPL
P/2017 W3Gibbs (*JFC)0.50397.73421.5118.3173.837310.52018/02/252039/08/30MPC · JPL
C/2017 X1PANSTARRS (*JFC)0.851131.3092175.1931.31064.66249.62018/06/142193MPC · JPL
P/2017 Y3Leonard0.87039.83830.8627.58591.275313.62018/02/112049MPC · JPL
C/2018 A1PANSTARRS0.906125.8169131.1853.62132.423313.12017/10/202148MPC · JPL
C/2018 A6Gibbs0.827317.43472.8077.4543.0118.92019/07/082092MPC · JPL
C/2018 DO4Lemmon0.906929.847131.40160.4752.40613.72019/08/182151MPC · JPL
C/2018 K1Weiland0.937129.890163.42164.1931.87911.92018/04/062182MPC · JPL
C/2018 M1CSS0.940922.087103.8137.2651.30415.92018/07/102122MPC · JPL
C/2018 O1ATLAS0.94427.864147.09154.0411.55812.62018/08/312165MPC · JPL
C/2018 R5Lemmon0.841822.8947109.55103.763.621362019/01/092128MPC · JPL
C/2018 V2ATLAS0.903425.616129.65159.1112.47514.52018/11/262148MPC · JPL
C/2018 W1CSS0.93821.779101.6483.2731.3615.6482019/05/112120MPC · JPL
C/2018 X3PANSTARRS0.78312.4168643.7543.3682.6988715.52018/12/302062MPC · JPL
P/2018 Y2Africano (*JFC)0.48787.54320.7211.488863.8635112018/12/132039MPC · JPL
C/2019 A5PANSTARRS0.708021.6608100.8167.53106.32429.42019/06/092119MPC · JPL
C/2019 L1PANSTARRS (*JFC)0.70659.847430.909.9932.8898613.62019/08/112050MPC · JPL
C/2019 L2NEOWISE0.937025.72130.48152.191.62210.32019/04/022149MPC · JPL
C/2019 LB7Kleyna0.929335.1204208.14164.232.48318.12019/03/272227MPC · JPL
C/2019 T5ATLAS0.80928.01422.6933.421.528914.92019/08/012042MPC · JPL
P/2019 V2Groeller (*JFC)0.3337.52320.6311.85.01839.82020/10/212041MPC · JPL
C/2019 Y4-CATLAS0.988823.187111.6544.020.258914.52020/05/312132MPC · JPL
C/2019 Y4-EATLAS0.98719.77587.9445.0850.252516.32020/05/312108MPC · JPL
C/2020 Q2PANSTARRS (*JFC)0.505510.923136.103.3105.40210.92020/02/072056MPC · JPL
C/2020 S2PANSTARRS0.827510.179332.4822.39781.75616.32020/12/212052MPC · JPL
P/2020 V3PANSTARRS (*JFC)0.25478.3624.1723.0356.238.62021/02/072045MPC · JPL
P/2020 V4Rankin (*JFC)0.44849.333628.5214.2455.156.92021/07/182050MPC · JPL

See also

References

  1. Yoshida, Seiichi. "C/2012 BJ98 (Lemmon)". aerith.net. Retrieved 23 July 2014.
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