Damocloid

Damocloids are a class of minor planets such as 5335 Damocles and 1996 PW that have Halley-type or long-period highly eccentric orbits typical of periodic comets such as Halley's Comet, but without showing a cometary coma or tail. David Jewitt defines a damocloid as an object with a Jupiter Tisserand invariant (TJ) of 2 or less,[1][a] while Akimasa Nakamura defines this group with the following orbital elements:[2]

However, this definition that does not focus on Jupiter excludes objects such as (127546) 2002 XU93, 2003 WG166, and 2004 DA62.[3]

Using the Tisserand's parameter with respect to Jupiter of 2 or less, there are currently 175 damocloid candidates as of June 2019.[4] Of these objects, 137 have orbital observation arcs greater than 30 days providing reasonably decent orbits.[5][1] Their average radius is eight kilometers assuming an albedo of 0.04. The albedos of four damocloids have been measured, and they are among the darkest objects known in the Solar System. Damocloids are reddish in color, but not as red as many Kuiper-belt objects or Centaurs. Other damocloids include: 2013 BL76, 2012 DR30, 2008 KV42, (65407) 2002 RP120, and 20461 Dioretsa.

Retrograde objects such as Halley's Comet and damocloid (343158) 2009 HC82 can have relative velocities to Earth of 81 km/s (290,000 km/h).[6]

Origin[]

Damocloids are thought to be nuclei of Halley-type comets that have lost all their volatile materials due to outgassing and become dormant. Such comets probably originate from the Oort cloud. This hypothesis is strengthened by the fact that a number of objects thought to be damocloids (and assigned minor-planet provisional designations) subsequently showed a coma and were confirmed to be comets: C/2001 OG108 (LONEOS), C/2002 CE10 (LINEAR), C/2002 VQ94 (LINEAR), C/2004 HV60 (Spacewatch) and possibly others. Another strong indication of cometary origin is the fact that some damocloids have retrograde orbits, unlike any other minor planets. (Objects with an inclination beyond 90 degrees up to 180 degrees are in a retrograde orbit and orbit in the opposite direction of other objects.)

List[]

This is a list of 18 numbered and 165 unnumbered bodies from the JPL SBDB as of January 2020, that meet Akimasa Nakamura's criteria for being classified as a damocloid, that is, either a retrograde orbit, or the following orbital elements: q < 5.2 AU, a > 8.0 AU, and e > 0.75 (also see § top). Tisserand's parameter with respect to Jupiter (TJupiter) is also given.[a] Akimasa Nakamura's criteria and a TJupiter of less than 2 are largely equivalent as only a few listed bodies do not meet the defined TJupiter threshold. Most damocloids are also listed on MPC's list of other unusual minor planets.[7] The orbital data is sourced from JPL-numbered and -unnumbered element files.[8] It includes some comets but excludes hyperbolic bodies such as A/2019 G4 as well as ʻOumuamua and 2I/Borisov, two interstellar objects.

Designation a
(AU)
e i
(°)
Orbital criteria and classes q
(AU)
Q
(AU)
Unusual Catalog Refs
Cls Retro TJupiter[a] TJ ≤ 2
5335 Damocles 11.84 0.866 61.6 CEN 1.157 Green tickY 1.59 22.09 unusual LoMP MPC · JPL
(15504) 1999 RG33 9.38 0.774 34.9 CEN 1.948 Green tickY 2.12 16.64 unusual LoMP MPC · JPL
20461 Dioretsa 23.9 0.9 160.4 CEN Green tickY -1.541 Green tickY 2.39 45.42 unusual LoMP MPC · JPL
(65407) 2002 RP120 53.71 0.954 119.1 TNO Green tickY -0.837 Green tickY 2.46 104.97 unusual LoMP MPC · JPL
(154783) 2004 PA44 14.22 0.76 3.3 CEN 2.510 3.41 25.03 unusual LoMP MPC · JPL
(330759) 2008 SO218 8.12 0.563 170.3 CEN Green tickY -1.394 Green tickY 3.55 12.69 unusual LoMP MPC · JPL
(336756) 2010 NV1 281.17 0.967 140.7 TNO Green tickY -2.901 Green tickY 9.4 552.94 LoMP MPC · JPL
(342842) 2008 YB3 11.6 0.441 105.1 CEN Green tickY -0.248 Green tickY 6.48 16.72 LoMP MPC · JPL
(343158) 2009 HC82 2.53 0.807 154.4 NEO Green tickY 1.316 Green tickY 0.49 4.57 LoMP MPC · JPL
(434620) 2005 VD 6.67 0.251 172.9 CEN Green tickY -1.396 Green tickY 5 8.35 unusual LoMP MPC · JPL
(459870) 2014 AT28 10.92 0.403 165.5 CEN Green tickY -2.092 Green tickY 6.52 15.32 LoMP MPC · JPL
(468861) 2013 LU28 187.07 0.953 125.4 TNO Green tickY -2.068 Green tickY 8.74 365.4 LoMP MPC · JPL
(471325) 2011 KT19 35.64 0.33 110.1 TNO Green tickY -1.555 Green tickY 23.88 47.41 LoMP MPC · JPL
514107 Kaʻepaokaʻawela 5.13 0.379 163.1 other Green tickY -0.744 Green tickY 3.19 7.07 unusual LoMP MPC · JPL
(518151) 2016 FH13 24.53 0.614 93.6 CEN Green tickY -0.003 Green tickY 9.46 39.6 LoMP MPC · JPL
(523797) 2016 NM56 71.96 0.854 144 TNO Green tickY -3.061 Green tickY 10.53 133.39 LoMP MPC · JPL
(523800) 2017 KZ31 53.88 0.796 161.7 TNO Green tickY -3.598 Green tickY 10.97 96.8 LoMP MPC · JPL
(528219) 2008 KV42 41.88 0.495 103.4 TNO Green tickY -1.018 Green tickY 21.14 62.62 LoMP MPC · JPL
1996 PW 258.24 0.99 30.1 TNO 1.708 Green tickY 2.48 513.99 unusual MPC · JPL
1997 MD10 26.47 0.943 59.5 CEN 0.961 Green tickY 1.52 51.42 unusual MPC · JPL
1998 QJ1 11.25 0.815 23.7 CEN 2.024 2.08 20.41 unusual MPC · JPL
1998 WU24 15.14 0.906 42.4 CEN 1.409 Green tickY 1.42 28.86 unusual MPC · JPL
1999 LE31 8.13 0.466 151.8 CEN Green tickY -1.309 Green tickY 4.34 11.92 unusual MPC · JPL
1999 XS35 17.77 0.947 19.4 NEO 1.411 Green tickY 0.94 34.61 MPC · JPL
2000 AB229 52.56 0.956 68.3 TNO 0.790 Green tickY 2.32 102.81 unusual MPC · JPL
2000 DG8 10.76 0.794 129.2 CEN Green tickY -0.624 Green tickY 2.22 19.31 unusual MPC · JPL
2000 HE46 23.66 0.899 158.6 CEN Green tickY -1.516 Green tickY 2.38 44.93 unusual MPC · JPL
2000 KP65 90.59 0.963 45.6 TNO 1.625 Green tickY 3.33 177.86 unusual MPC · JPL
2002 RN109 547.97 0.995 58.3 TNO 1.075 Green tickY 2.68 1093.26 unusual MPC · JPL
2003 UY283 33.33 0.896 18.9 TNO 2.284 3.47 63.19 unusual MPC · JPL
2003 WN188 14.4 0.846 26.8 CEN 1.944 Green tickY 2.22 26.58 unusual MPC · JPL
2004 CM111 33.73 0.851 4.7 TNO 2.821 5.03 62.42 unusual MPC · JPL
2004 NN8 99.42 0.976 165.6 TNO Green tickY -1.782 Green tickY 2.36 196.48 unusual MPC · JPL
2005 HL3 11.29 0.831 35.7 CEN 1.790 Green tickY 1.9 20.67 unusual MPC · JPL
2005 NP82 5.87 0.477 130.5 CEN Green tickY -0.326 Green tickY 3.07 8.67 unusual MPC · JPL
2005 OE 63.07 0.952 67.5 TNO 0.899 Green tickY 3.04 123.1 unusual MPC · JPL
2005 SB223 29.41 0.905 91.4 CEN Green tickY 0.128 Green tickY 2.79 56.04 unusual MPC · JPL
2005 TJ50 9.16 0.584 110.3 CEN Green tickY -0.177 Green tickY 3.81 14.51 unusual MPC · JPL
2005 VX3 815.3 0.995 112.3 TNO Green tickY -0.943 Green tickY 4.1 1626.5 unusual MPC · JPL
2006 BZ8 9.6 0.803 165.3 CEN Green tickY -1.022 Green tickY 1.89 17.31 unusual MPC · JPL
2006 EX52 42.3 0.94 150.2 TNO Green tickY -1.570 Green tickY 2.55 82.04 unusual MPC · JPL
2006 LM1 32.19 0.885 172.1 TNO Green tickY -2.133 Green tickY 3.7 60.67 unusual MPC · JPL
2006 RG1 25.61 0.921 133.5 CEN Green tickY -0.988 Green tickY 2.03 49.2 unusual MPC · JPL
2006 RJ2 9.67 0.761 164.6 CEN Green tickY -1.168 Green tickY 2.31 17.02 unusual MPC · JPL
2006 SO134 19.51 0.832 4.2 CEN 2.412 3.29 35.74 unusual MPC · JPL
2007 DA61 467.7 0.994 76.5 TNO 0.483 Green tickY 2.67 932.74 unusual MPC · JPL
2007 VW266 5.45 0.39 108.3 other Green tickY 0.363 Green tickY 3.32 7.57 unusual MPC · JPL
2008 BN18 30.42 0.914 28.8 TNO 1.888 Green tickY 2.61 58.24 unusual MPC · JPL
2008 SE82 19.33 0.836 17.4 CEN 2.287 3.17 35.49 unusual MPC · JPL
2008 WA95 14.03 0.878 60.1 CEN 1.154 Green tickY 1.71 26.34 unusual MPC · JPL
2009 AU16 23.59 0.917 69.8 CEN 0.807 Green tickY 1.95 45.22 unusual MPC · JPL
2009 DD47 47.98 0.954 107.5 TNO Green tickY -0.439 Green tickY 2.22 93.73 unusual MPC · JPL
2009 FW23 11.52 0.855 86.5 CEN 0.546 Green tickY 1.67 21.37 unusual MPC · JPL
2009 QY6 12.47 0.834 137.8 CEN Green tickY -0.848 Green tickY 2.07 22.86 unusual MPC · JPL
2009 YS6 20.14 0.92 147.8 CEN Green tickY -1.048 Green tickY 1.62 38.67 unusual MPC · JPL
2010 BK118 376.12 0.984 143.9 TNO Green tickY -2.451 Green tickY 6.1 746.15 MPC · JPL
2010 CG55 31.84 0.91 146.2 TNO Green tickY -1.541 Green tickY 2.86 60.82 unusual MPC · JPL
2010 EB46 31.45 0.952 156.6 TNO Green tickY -1.213 Green tickY 1.5 61.4 unusual MPC · JPL
2010 EJ104 21.64 0.9 41.4 CEN 1.571 Green tickY 2.16 41.11 unusual MPC · JPL
2010 EQ169 2.09 0.093 92 MBA Green tickY 2.449 1.89 2.28 MPC · JPL
2010 GW64 62.9 0.941 105.2 TNO Green tickY -0.535 Green tickY 3.71 122.1 unusual MPC · JPL
2010 GW147 170.07 0.968 99.9 TNO Green tickY -0.460 Green tickY 5.39 334.75 MPC · JPL
2010 JH124 69.91 0.963 53.4 TNO 1.259 Green tickY 2.61 137.22 unusual MPC · JPL
2010 JC147 14.62 0.762 41.7 CEN 1.977 Green tickY 3.48 25.76 unusual MPC · JPL
2010 LG61 6.28 0.784 123.8 CEN Green tickY 0.069 Green tickY 1.36 11.2 unusual MPC · JPL
2010 OR1 26.93 0.924 143.9 CEN Green tickY -1.214 Green tickY 2.05 51.82 unusual MPC · JPL
2010 OM101 26.04 0.918 118.8 CEN Green tickY -0.655 Green tickY 2.13 49.95 unusual MPC · JPL
2010 PO58 13.14 0.779 121.4 CEN Green tickY -0.641 Green tickY 2.9 23.38 unusual MPC · JPL
2011 MM4 21.22 0.473 100.5 CEN Green tickY -0.403 Green tickY 11.18 31.25 MPC · JPL
2011 OR17 278.54 0.989 110.5 TNO Green tickY -0.746 Green tickY 3.12 553.96 unusual MPC · JPL
2011 SP25 19.55 0.884 109.2 CEN Green tickY -0.330 Green tickY 2.27 36.84 unusual MPC · JPL
2011 UR402 18.62 0.779 24.6 CEN 2.439 4.12 33.12 unusual MPC · JPL
2011 WS41 37.85 0.945 141.6 TNO Green tickY -1.242 Green tickY 2.07 73.62 unusual MPC · JPL
2012 HD2 63 0.959 146.8 TNO Green tickY -1.560 Green tickY 2.56 123.44 unusual MPC · JPL
2012 KA51 3000 0.998 70.7 TNO 0.911 Green tickY 4.91 5995.09 unusual MPC · JPL
2012 TL139 29.53 0.881 160 CEN Green tickY -1.944 Green tickY 3.52 55.54 unusual MPC · JPL
2012 YO6 6.31 0.478 106.9 CEN Green tickY 0.262 Green tickY 3.29 9.33 unusual MPC · JPL
2012 YE8 9.3 0.589 136 CEN Green tickY -0.996 Green tickY 3.82 14.77 unusual MPC · JPL
2013 BN27 59.34 0.974 101.8 TNO Green tickY -0.227 Green tickY 1.56 117.13 unusual MPC · JPL
2013 BL76 937.32 0.991 98.6 TNO Green tickY -0.528 Green tickY 8.36 1866.28 MPC · JPL
2013 HS150 58.12 0.951 97.1 TNO Green tickY -0.166 Green tickY 2.82 113.43 unusual MPC · JPL
2013 JD4 12.11 0.865 73 CEN 0.878 Green tickY 1.64 22.59 unusual MPC · JPL
2013 LA2 5.68 0.466 175.1 CEN Green tickY -0.928 Green tickY 3.04 8.33 unusual MPC · JPL
2013 LD16 81.54 0.969 154.7 TNO Green tickY -1.712 Green tickY 2.55 160.52 unusual MPC · JPL
2013 LG29 17.03 0.791 15.4 CEN 2.440 3.56 30.5 unusual MPC · JPL
2013 NS11 12.6 0.786 130.3 CEN Green tickY -0.831 Green tickY 2.69 22.51 unusual MPC · JPL
2013 YG48 8.18 0.752 61.3 CEN 1.429 Green tickY 2.03 14.33 unusual MPC · JPL
2014 CW14 33.02 0.869 170.8 TNO Green tickY -2.299 Green tickY 4.31 61.72 unusual MPC · JPL
2014 JJ57 7 0.292 95.9 CEN Green tickY 0.514 Green tickY 4.96 9.04 unusual MPC · JPL
2014 MH55 48.1 0.907 92.6 TNO Green tickY -0.006 Green tickY 4.48 91.72 unusual MPC · JPL
2014 PP69 21.34 0.941 93.7 NEO Green tickY 0.156 Green tickY 1.25 41.43 MPC · JPL
2014 SQ339 28.88 0.904 128.5 CEN Green tickY -1.076 Green tickY 2.78 54.98 unusual MPC · JPL
2014 UV114 13.86 0.71 171 CEN Green tickY -1.895 Green tickY 4.02 23.7 unusual MPC · JPL
2014 XS3 72.46 0.955 101.4 TNO Green tickY -0.366 Green tickY 3.25 141.67 unusual MPC · JPL
2015 AO44 22.04 0.836 139.9 CEN Green tickY -1.493 Green tickY 3.62 40.45 unusual MPC · JPL
2015 BH311 9.17 0.729 94.5 CEN Green tickY 0.424 Green tickY 2.49 15.85 unusual MPC · JPL
2015 FK37 441.08 0.989 156.1 TNO Green tickY -2.507 Green tickY 4.96 877.2 unusual MPC · JPL
2015 RK245 80.21 0.966 91.7 TNO Green tickY 0.005 Green tickY 2.76 157.65 unusual MPC · JPL
2015 RE277 20.2 0.764 1.6 CEN 2.798 4.76 35.63 unusual MPC · JPL
2015 RL277 34.78 0.851 3.1 TNO 2.863 5.19 64.37 unusual MPC · JPL
2015 RM306 255.28 0.955 176 TNO Green tickY -4.118 Green tickY 11.45 499.1 MPC · JPL
2015 TN178 54.26 0.956 91.1 TNO Green tickY 0.059 Green tickY 2.39 106.13 unusual MPC · JPL
2015 TS350 142.79 0.965 58 TNO 1.498 Green tickY 5.05 280.53 MPC · JPL
2015 XN63 18.9 0.927 19.4 CEN 1.621 Green tickY 1.37 36.42 unusual MPC · JPL
2015 XX351 14.53 0.854 159.1 CEN Green tickY -1.269 Green tickY 2.13 26.94 unusual MPC · JPL
2015 XR384 36.7 0.903 157.5 TNO Green tickY -1.969 Green tickY 3.57 69.84 unusual MPC · JPL
2015 YY18 19.41 0.831 118.2 CEN Green tickY -0.749 Green tickY 3.28 35.53 unusual MPC · JPL
2016 AT281 63.39 0.958 22.2 TNO 1.943 Green tickY 2.68 124.09 MPC · JPL
2016 CO264 48.1 0.937 129.8 TNO Green tickY -1.247 Green tickY 3.01 93.18 unusual MPC · JPL
2016 DF2 7.2 0.538 167.1 CEN Green tickY -1.209 Green tickY 3.32 11.07 unusual MPC · JPL
2016 EJ203 67.43 0.96 171 TNO Green tickY -1.925 Green tickY 2.73 132.13 unusual MPC · JPL
2016 JK24 13.06 0.661 152.3 CEN Green tickY -1.708 Green tickY 4.43 21.69 unusual MPC · JPL
2016 LS 13.32 0.606 114.3 CEN Green tickY -0.658 Green tickY 5.25 21.4 MPC · JPL
2016 NL100 13.87 0.76 21.9 CEN 2.343 3.33 24.41 MPC · JPL
2016 PN66 31.06 0.907 105.1 TNO Green tickY -0.371 Green tickY 2.9 59.22 unusual MPC · JPL
2016 TK2 9.19 0.551 92.3 CEN Green tickY 0.476 Green tickY 4.12 14.25 unusual MPC · JPL
2016 TP93 7.39 0.555 138.3 CEN Green tickY -0.777 Green tickY 3.29 11.49 unusual MPC · JPL
2016 US109 35.86 0.948 87.2 TNO 0.227 Green tickY 1.86 69.86 unusual MPC · JPL
2016 VY17 11.14 0.851 148.5 CEN Green tickY -0.845 Green tickY 1.66 20.61 unusual MPC · JPL
2016 WS1 14.37 0.882 53 CEN 1.305 Green tickY 1.7 27.05 unusual MPC · JPL
2016 YB13 5.45 0.407 139.8 other Green tickY -0.473 Green tickY 3.23 7.67 unusual MPC · JPL
2017 AX13 28.65 0.883 137.2 CEN Green tickY -1.435 Green tickY 3.35 53.95 unusual MPC · JPL
2017 CW32 191.86 0.985 152.4 TNO Green tickY -1.855 Green tickY 2.95 380.76 unusual MPC · JPL
2017 EM4 33.29 0.921 83.4 TNO 0.383 Green tickY 2.65 63.93 unusual MPC · JPL
2017 GD8 43.37 0.947 74.9 TNO 0.602 Green tickY 2.28 84.45 unusual MPC · JPL
2017 JB6 32.6 0.883 160.9 TNO Green tickY -2.061 Green tickY 3.82 61.38 unusual MPC · JPL
2017 MZ4 66.8 0.952 65.8 TNO 0.973 Green tickY 3.19 130.41 unusual MPC · JPL
2017 MB7 1711.8 0.997 55.7 TNO 1.477 Green tickY 4.46 3419.14 unusual MPC · JPL
2017 NM2 14.64 0.623 101.3 CEN Green tickY -0.158 Green tickY 5.52 23.77 MPC · JPL
2017 OX68 58.97 0.971 94.8 TNO Green tickY -0.046 Green tickY 1.73 116.21 unusual MPC · JPL
2017 PY24 17.35 0.924 71.8 CEN 0.734 Green tickY 1.31 33.4 unusual MPC · JPL
2017 QO33 34.39 0.857 148.8 TNO Green tickY -2.119 Green tickY 4.93 63.85 unusual MPC · JPL
2017 RR2 11.6 0.782 87.1 CEN 0.543 Green tickY 2.53 20.67 unusual MPC · JPL
2017 SV13 9.66 0.792 113.3 CEN Green tickY -0.118 Green tickY 2.01 17.3 unusual MPC · JPL
2017 SN33 242.29 0.992 152 TNO Green tickY -1.463 Green tickY 1.84 482.73 unusual MPC · JPL
2017 UW51 130.29 0.976 144.2 TNO Green tickY -1.730 Green tickY 3.14 257.44 unusual MPC · JPL
2017 UX51 30.05 0.747 90.5 CEN Green tickY 0.146 Green tickY 7.61 52.49 MPC · JPL
2017 UR52 352.63 0.996 108.2 NEO Green tickY -0.417 Green tickY 1.24 704.01 MPC · JPL
2017 YL2 8.94 0.767 27.8 CEN 2.070 2.09 15.8 unusual MPC · JPL
2018 AS18 12.97 0.872 63 CEN 1.103 Green tickY 1.66 24.29 unusual MPC · JPL
2018 DE4 32.31 0.926 81.3 TNO 0.445 Green tickY 2.39 62.24 unusual MPC · JPL
2018 DF4 97.75 0.984 68.2 TNO 0.633 Green tickY 1.6 193.91 unusual MPC · JPL
2018 KH3 94.35 0.961 46.9 TNO 1.671 Green tickY 3.7 184.99 unusual MPC · JPL
2018 MP8 357.96 0.989 68.3 TNO 0.909 Green tickY 3.83 712.09 unusual MPC · JPL
2018 PL28 19.54 0.862 74.1 CEN 0.802 Green tickY 2.69 36.39 unusual MPC · JPL
2018 SQ13 155.88 0.981 91 TNO Green tickY -0.002 Green tickY 2.97 308.78 unusual MPC · JPL
2018 TL6 8.15 0.788 170.9 CEN Green tickY -0.881 Green tickY 1.72 14.57 unusual MPC · JPL
A/2018 V3 121.44 0.989 165 TNO Green tickY -1.339 Green tickY 1.34 241.55 MPC · JPL
2018 WB1 7.28 0.694 152.3 CEN Green tickY -0.792 Green tickY 2.23 12.33 unusual MPC · JPL
2019 CR 14.49 0.595 160.3 CEN Green tickY -2.168 Green tickY 5.87 23.12 MPC · JPL
2019 EJ3 24.23 0.956 139.6 NEO Green tickY -0.754 Green tickY 1.08 47.39 MPC · JPL
A/2019 G2 698.71 0.997 159.2 TNO Green tickY -1.746 Green tickY 2.29 1395.13 MPC · JPL
A/2019 G3 17.15 0.834 156.8 CEN Green tickY -1.541 Green tickY 2.85 31.45 MPC · JPL
2019 HC4 8.78 0.554 134.3 CEN Green tickY -0.916 Green tickY 3.91 13.64 unusual MPC · JPL
2019 KE7 11.66 0.702 108.3 CEN Green tickY -0.223 Green tickY 3.48 19.85 MPC · JPL
2019 KN19 12.52 0.767 14.7 CEN 2.340 2.92 22.12 MPC · JPL
A/2019 O2 57.49 0.832 93.3 TNO Green tickY -0.121 Green tickY 9.68 105.29 MPC · JPL
A/2019 O4 32.89 0.889 115.1 TNO Green tickY -0.817 Green tickY 3.64 62.13 MPC · JPL
2019 PN2 25.18 0.92 113 CEN Green tickY -0.466 Green tickY 2.01 48.35 MPC · JPL
A/2019 Q2 59.68 0.979 159 NEO Green tickY -1.205 Green tickY 1.26 118.11 MPC · JPL
A/2019 T1 38.18 0.888 120.9 TNO Green tickY -1.143 Green tickY 4.28 72.07 MPC · JPL
A/2019 U5 22759.43 1 113.5 TNO Green tickY -0.942 Green tickY 3.62 45515.24 MPC · JPL
2019 YJ6 37.68 0.932 22 TNO 1.947 Green tickY 2.56 72.8 MPC · JPL
A/2020 A1 25.94 0.936 149 CEN Green tickY -1.152 Green tickY 1.67 50.2 MPC · JPL
A/2020 B1 52.32 0.967 18.5 TNO 1.641 Green tickY 1.75 102.88 MPC · JPL
2020 BZ12 7.7 0.922 165.5 NEO Green tickY -0.238 Green tickY 0.6 14.79 MPC · JPL
2020 EP 10.51 0.764 76.4 CEN 0.927 Green tickY 2.48 18.54 MPC · JPL
A/2020 F7 811.54 0.993 93.9 TNO Green tickY -0.190 Green tickY 5.33 1617.75 MPC · JPL
2020 FH24 14.28 0.771 28.5 CEN 2.218 3.27 25.28 MPC · JPL
A/2020 H9 341.71 0.992 137.9 TNO Green tickY -1.458 Green tickY 2.58 680.84 MPC · JPL
2020 HB11 16.55 0.708 147.3 CEN Green tickY -1.806 Green tickY 4.84 28.26 MPC · JPL
2020 KD6 13.1 0.872 38.7 CEN 1.611 Green tickY 1.68 24.52 MPC · JPL
2020 KH7 7.94 0.502 106.2 CEN Green tickY 0.060 Green tickY 3.95 11.93 MPC · JPL
2020 KU7 34.8 0.879 103.8 TNO Green tickY -0.439 Green tickY 4.2 65.41 MPC · JPL
2020 ML1 54.03 0.953 82.5 TNO 0.351 Green tickY 2.54 105.53 MPC · JPL
2020 OR5 6.23 0.376 166.6 CEN Green tickY -1.138 Green tickY 3.89 8.58 MPC · JPL
2020 OS5 6.9 0.684 155.8 CEN Green tickY -0.779 Green tickY 2.18 11.63 MPC · JPL
2020 OP7 28.65 0.895 79.5 CEN 0.564 Green tickY 3 54.31 MPC · JPL
2020 PV6 39.97 0.943 128.2 TNO Green tickY -1.013 Green tickY 2.29 77.65 MPC · JPL
2020 QN6 311.26 0.985 76.7 TNO 0.639 Green tickY 4.82 617.7 MPC · JPL
2020 QO6 18.9 0.874 80.5 CEN 0.583 Green tickY 2.39 35.41 MPC · JPL
2020 SJ5 18.2 0.856 77.4 CEN 0.708 Green tickY 2.62 33.78 MPC · JPL
Designation a
(AU)
e i
(°)
Orbital criteria and classes q
(AU)
Q
(AU)
Unusual Catalog Refs
Cls Retro TJupiter TJ ≤ 2

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Notes[]

  1. ^ a b c The Jupiter Tisserand invariant or Tisserand's parameter with respect to Jupiter can be derived from Jupiter's semi-major axis (aJ) and the minor planet's orbital elements (a, e and i) as follows:[9]
    aJ/a + 2(cos i) × a/aJ × (1-e2)
    Note
    In order to agree with the data displayed at the JPL Small-Body Database from which the orbital elements are sourced,[8] the calculation of the Tisserand invariant uses a value of 5.203363 AU for Jupiter's osculating semi-major axis (aJ). Also, the degrees of the objects inclination need to be converted into the radian equivalent such as in:
    ($a_j / $a) + (2 * cos(deg2rad($i))) * sqrt(($a/$a_j) * (1 - $e * $e)).

See also[]

References[]

  1. ^ a b Jewitt, David (August 2013). "The DAMOCLOIDS". UCLA, Department of Earth and Space Sciences. Retrieved 14 February 2014. (2013 list / 2011 list / 2010 list)
  2. ^ Akimasa Nakamura and bas (2 May 2009). "List of Damocloids (Oort cloud asteroids)". Lowell Observatory. Retrieved 15 February 2017.
  3. ^ Jewitt, David (2005). "A first look at the Damocloids" (PDF). The Astronomical Journal. 129 (1): 530–538. Bibcode:2005AJ....129..530J. doi:10.1086/426328. Retrieved 13 February 2011.
  4. ^ "JPL Small-Body Database Search Engine: asteroids and T-Jupiter <= 2". JPL Solar System Dynamics. Retrieved 1 June 2019. Search parameters used: Limited by object type/group: Asteroids and T-Jupiter <= 2
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  6. ^ "NEO Close-Approaches (Between 1900 and 2200)". NASA/JPL Near-Earth Object Program. Retrieved 22 June 2012. (sorted by descending relative velocity, dist<0.5 AU = "215,221 close-Earth approaches")
  7. ^ "List Of Other Unusual Objects". Minor Planet Center. Retrieved 1 June 2019.
  8. ^ a b "JPL Small-Body Orbital Elements – ASCII Files". JPL Solar System Dynamics. Retrieved 19 October 2020.
  9. ^ Alvarez-Candal, A. (January 2013). "SDSS photometry of asteroids in cometary orbits" (PDF). Astronomy and Astrophysics. 549: A34. arXiv:1211.4351. Bibcode:2013A&A...549A..34A. doi:10.1051/0004-6361/201220274. ISSN 0004-6361.

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