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][lower-alpha 1] 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.[lower-alpha 1] 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[lower-alpha 1] | TJ ≤ 2 | |||||||||
5335 Damocles | 11.84 | 0.866 | 61.6 | CEN | — | 1.157 | ![]() |
1.59 | 22.09 | unusual | LoMP | MPC · JPL |
(15504) 1999 RG33 | 9.38 | 0.774 | 34.9 | CEN | — | 1.948 | ![]() |
2.12 | 16.64 | unusual | LoMP | MPC · JPL |
20461 Dioretsa | 23.9 | 0.9 | 160.4 | CEN | ![]() |
-1.541 | ![]() |
2.39 | 45.42 | unusual | LoMP | MPC · JPL |
(65407) 2002 RP120 | 53.71 | 0.954 | 119.1 | TNO | ![]() |
-0.837 | ![]() |
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 | ![]() |
-1.394 | ![]() |
3.55 | 12.69 | unusual | LoMP | MPC · JPL |
(336756) 2010 NV1 | 281.17 | 0.967 | 140.7 | TNO | ![]() |
-2.901 | ![]() |
9.4 | 552.94 | — | LoMP | MPC · JPL |
(342842) 2008 YB3 | 11.6 | 0.441 | 105.1 | CEN | ![]() |
-0.248 | ![]() |
6.48 | 16.72 | — | LoMP | MPC · JPL |
(343158) 2009 HC82 | 2.53 | 0.807 | 154.4 | NEO | ![]() |
1.316 | ![]() |
0.49 | 4.57 | — | LoMP | MPC · JPL |
(434620) 2005 VD | 6.67 | 0.251 | 172.9 | CEN | ![]() |
-1.396 | ![]() |
5 | 8.35 | unusual | LoMP | MPC · JPL |
(459870) 2014 AT28 | 10.92 | 0.403 | 165.5 | CEN | ![]() |
-2.092 | ![]() |
6.52 | 15.32 | — | LoMP | MPC · JPL |
(468861) 2013 LU28 | 187.07 | 0.953 | 125.4 | TNO | ![]() |
-2.068 | ![]() |
8.74 | 365.4 | — | LoMP | MPC · JPL |
(471325) 2011 KT19 | 35.64 | 0.33 | 110.1 | TNO | ![]() |
-1.555 | ![]() |
23.88 | 47.41 | — | LoMP | MPC · JPL |
514107 Kaʻepaokaʻawela | 5.13 | 0.379 | 163.1 | other | ![]() |
-0.744 | ![]() |
3.19 | 7.07 | unusual | LoMP | MPC · JPL |
(518151) 2016 FH13 | 24.53 | 0.614 | 93.6 | CEN | ![]() |
-0.003 | ![]() |
9.46 | 39.6 | — | LoMP | MPC · JPL |
(523797) 2016 NM56 | 71.96 | 0.854 | 144 | TNO | ![]() |
-3.061 | ![]() |
10.53 | 133.39 | — | LoMP | MPC · JPL |
(523800) 2017 KZ31 | 53.88 | 0.796 | 161.7 | TNO | ![]() |
-3.598 | ![]() |
10.97 | 96.8 | — | LoMP | MPC · JPL |
(528219) 2008 KV42 | 41.88 | 0.495 | 103.4 | TNO | ![]() |
-1.018 | ![]() |
21.14 | 62.62 | — | LoMP | MPC · JPL |
1996 PW | 258.24 | 0.99 | 30.1 | TNO | — | 1.708 | ![]() |
2.48 | 513.99 | unusual | — | MPC · JPL |
1997 MD10 | 26.47 | 0.943 | 59.5 | CEN | — | 0.961 | ![]() |
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 | ![]() |
1.42 | 28.86 | unusual | — | MPC · JPL |
1999 LE31 | 8.13 | 0.466 | 151.8 | CEN | ![]() |
-1.309 | ![]() |
4.34 | 11.92 | unusual | — | MPC · JPL |
1999 XS35 | 17.77 | 0.947 | 19.4 | NEO | — | 1.411 | ![]() |
0.94 | 34.61 | — | — | MPC · JPL |
2000 AB229 | 52.56 | 0.956 | 68.3 | TNO | — | 0.790 | ![]() |
2.32 | 102.81 | unusual | — | MPC · JPL |
2000 DG8 | 10.76 | 0.794 | 129.2 | CEN | ![]() |
-0.624 | ![]() |
2.22 | 19.31 | unusual | — | MPC · JPL |
2000 HE46 | 23.66 | 0.899 | 158.6 | CEN | ![]() |
-1.516 | ![]() |
2.38 | 44.93 | unusual | — | MPC · JPL |
2000 KP65 | 90.59 | 0.963 | 45.6 | TNO | — | 1.625 | ![]() |
3.33 | 177.86 | unusual | — | MPC · JPL |
2002 RN109 | 547.97 | 0.995 | 58.3 | TNO | — | 1.075 | ![]() |
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 | ![]() |
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 | ![]() |
-1.782 | ![]() |
2.36 | 196.48 | unusual | — | MPC · JPL |
2005 HL3 | 11.29 | 0.831 | 35.7 | CEN | — | 1.790 | ![]() |
1.9 | 20.67 | unusual | — | MPC · JPL |
2005 NP82 | 5.87 | 0.477 | 130.5 | CEN | ![]() |
-0.326 | ![]() |
3.07 | 8.67 | unusual | — | MPC · JPL |
2005 OE | 63.07 | 0.952 | 67.5 | TNO | — | 0.899 | ![]() |
3.04 | 123.1 | unusual | — | MPC · JPL |
2005 SB223 | 29.41 | 0.905 | 91.4 | CEN | ![]() |
0.128 | ![]() |
2.79 | 56.04 | unusual | — | MPC · JPL |
2005 TJ50 | 9.16 | 0.584 | 110.3 | CEN | ![]() |
-0.177 | ![]() |
3.81 | 14.51 | unusual | — | MPC · JPL |
2005 VX3 | 815.3 | 0.995 | 112.3 | TNO | ![]() |
-0.943 | ![]() |
4.1 | 1626.5 | unusual | — | MPC · JPL |
2006 BZ8 | 9.6 | 0.803 | 165.3 | CEN | ![]() |
-1.022 | ![]() |
1.89 | 17.31 | unusual | — | MPC · JPL |
2006 EX52 | 42.3 | 0.94 | 150.2 | TNO | ![]() |
-1.570 | ![]() |
2.55 | 82.04 | unusual | — | MPC · JPL |
2006 LM1 | 32.19 | 0.885 | 172.1 | TNO | ![]() |
-2.133 | ![]() |
3.7 | 60.67 | unusual | — | MPC · JPL |
2006 RG1 | 25.61 | 0.921 | 133.5 | CEN | ![]() |
-0.988 | ![]() |
2.03 | 49.2 | unusual | — | MPC · JPL |
2006 RJ2 | 9.67 | 0.761 | 164.6 | CEN | ![]() |
-1.168 | ![]() |
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 | ![]() |
2.67 | 932.74 | unusual | — | MPC · JPL |
2007 VW266 | 5.45 | 0.39 | 108.3 | other | ![]() |
0.363 | ![]() |
3.32 | 7.57 | unusual | — | MPC · JPL |
2008 BN18 | 30.42 | 0.914 | 28.8 | TNO | — | 1.888 | ![]() |
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 | ![]() |
1.71 | 26.34 | unusual | — | MPC · JPL |
2009 AU16 | 23.59 | 0.917 | 69.8 | CEN | — | 0.807 | ![]() |
1.95 | 45.22 | unusual | — | MPC · JPL |
2009 DD47 | 47.98 | 0.954 | 107.5 | TNO | ![]() |
-0.439 | ![]() |
2.22 | 93.73 | unusual | — | MPC · JPL |
2009 FW23 | 11.52 | 0.855 | 86.5 | CEN | — | 0.546 | ![]() |
1.67 | 21.37 | unusual | — | MPC · JPL |
2009 QY6 | 12.47 | 0.834 | 137.8 | CEN | ![]() |
-0.848 | ![]() |
2.07 | 22.86 | unusual | — | MPC · JPL |
2009 YS6 | 20.14 | 0.92 | 147.8 | CEN | ![]() |
-1.048 | ![]() |
1.62 | 38.67 | unusual | — | MPC · JPL |
2010 BK118 | 376.12 | 0.984 | 143.9 | TNO | ![]() |
-2.451 | ![]() |
6.1 | 746.15 | — | — | MPC · JPL |
2010 CG55 | 31.84 | 0.91 | 146.2 | TNO | ![]() |
-1.541 | ![]() |
2.86 | 60.82 | unusual | — | MPC · JPL |
2010 EB46 | 31.45 | 0.952 | 156.6 | TNO | ![]() |
-1.213 | ![]() |
1.5 | 61.4 | unusual | — | MPC · JPL |
2010 EJ104 | 21.64 | 0.9 | 41.4 | CEN | — | 1.571 | ![]() |
2.16 | 41.11 | unusual | — | MPC · JPL |
2010 EQ169 | 2.09 | 0.093 | 92 | MBA | ![]() |
2.449 | — | 1.89 | 2.28 | — | — | MPC · JPL |
2010 GW64 | 62.9 | 0.941 | 105.2 | TNO | ![]() |
-0.535 | ![]() |
3.71 | 122.1 | unusual | — | MPC · JPL |
2010 GW147 | 170.07 | 0.968 | 99.9 | TNO | ![]() |
-0.460 | ![]() |
5.39 | 334.75 | — | — | MPC · JPL |
2010 JH124 | 69.91 | 0.963 | 53.4 | TNO | — | 1.259 | ![]() |
2.61 | 137.22 | unusual | — | MPC · JPL |
2010 JC147 | 14.62 | 0.762 | 41.7 | CEN | — | 1.977 | ![]() |
3.48 | 25.76 | unusual | — | MPC · JPL |
2010 LG61 | 6.28 | 0.784 | 123.8 | CEN | ![]() |
0.069 | ![]() |
1.36 | 11.2 | unusual | — | MPC · JPL |
2010 OR1 | 26.93 | 0.924 | 143.9 | CEN | ![]() |
-1.214 | ![]() |
2.05 | 51.82 | unusual | — | MPC · JPL |
2010 OM101 | 26.04 | 0.918 | 118.8 | CEN | ![]() |
-0.655 | ![]() |
2.13 | 49.95 | unusual | — | MPC · JPL |
2010 PO58 | 13.14 | 0.779 | 121.4 | CEN | ![]() |
-0.641 | ![]() |
2.9 | 23.38 | unusual | — | MPC · JPL |
2011 MM4 | 21.22 | 0.473 | 100.5 | CEN | ![]() |
-0.403 | ![]() |
11.18 | 31.25 | — | — | MPC · JPL |
2011 OR17 | 278.54 | 0.989 | 110.5 | TNO | ![]() |
-0.746 | ![]() |
3.12 | 553.96 | unusual | — | MPC · JPL |
2011 SP25 | 19.55 | 0.884 | 109.2 | CEN | ![]() |
-0.330 | ![]() |
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 | ![]() |
-1.242 | ![]() |
2.07 | 73.62 | unusual | — | MPC · JPL |
2012 HD2 | 63 | 0.959 | 146.8 | TNO | ![]() |
-1.560 | ![]() |
2.56 | 123.44 | unusual | — | MPC · JPL |
2012 KA51 | 3000 | 0.998 | 70.7 | TNO | — | 0.911 | ![]() |
4.91 | 5995.09 | unusual | — | MPC · JPL |
2012 TL139 | 29.53 | 0.881 | 160 | CEN | ![]() |
-1.944 | ![]() |
3.52 | 55.54 | unusual | — | MPC · JPL |
2012 YO6 | 6.31 | 0.478 | 106.9 | CEN | ![]() |
0.262 | ![]() |
3.29 | 9.33 | unusual | — | MPC · JPL |
2012 YE8 | 9.3 | 0.589 | 136 | CEN | ![]() |
-0.996 | ![]() |
3.82 | 14.77 | unusual | — | MPC · JPL |
2013 BN27 | 59.34 | 0.974 | 101.8 | TNO | ![]() |
-0.227 | ![]() |
1.56 | 117.13 | unusual | — | MPC · JPL |
2013 BL76 | 937.32 | 0.991 | 98.6 | TNO | ![]() |
-0.528 | ![]() |
8.36 | 1866.28 | — | — | MPC · JPL |
2013 HS150 | 58.12 | 0.951 | 97.1 | TNO | ![]() |
-0.166 | ![]() |
2.82 | 113.43 | unusual | — | MPC · JPL |
2013 JD4 | 12.11 | 0.865 | 73 | CEN | — | 0.878 | ![]() |
1.64 | 22.59 | unusual | — | MPC · JPL |
2013 LA2 | 5.68 | 0.466 | 175.1 | CEN | ![]() |
-0.928 | ![]() |
3.04 | 8.33 | unusual | — | MPC · JPL |
2013 LD16 | 81.54 | 0.969 | 154.7 | TNO | ![]() |
-1.712 | ![]() |
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 | ![]() |
-0.831 | ![]() |
2.69 | 22.51 | unusual | — | MPC · JPL |
2013 YG48 | 8.18 | 0.752 | 61.3 | CEN | — | 1.429 | ![]() |
2.03 | 14.33 | unusual | — | MPC · JPL |
2014 CW14 | 33.02 | 0.869 | 170.8 | TNO | ![]() |
-2.299 | ![]() |
4.31 | 61.72 | unusual | — | MPC · JPL |
2014 JJ57 | 7 | 0.292 | 95.9 | CEN | ![]() |
0.514 | ![]() |
4.96 | 9.04 | unusual | — | MPC · JPL |
2014 MH55 | 48.1 | 0.907 | 92.6 | TNO | ![]() |
-0.006 | ![]() |
4.48 | 91.72 | unusual | — | MPC · JPL |
2014 PP69 | 21.34 | 0.941 | 93.7 | NEO | ![]() |
0.156 | ![]() |
1.25 | 41.43 | — | — | MPC · JPL |
2014 SQ339 | 28.88 | 0.904 | 128.5 | CEN | ![]() |
-1.076 | ![]() |
2.78 | 54.98 | unusual | — | MPC · JPL |
2014 UV114 | 13.86 | 0.71 | 171 | CEN | ![]() |
-1.895 | ![]() |
4.02 | 23.7 | unusual | — | MPC · JPL |
2014 XS3 | 72.46 | 0.955 | 101.4 | TNO | ![]() |
-0.366 | ![]() |
3.25 | 141.67 | unusual | — | MPC · JPL |
2015 AO44 | 22.04 | 0.836 | 139.9 | CEN | ![]() |
-1.493 | ![]() |
3.62 | 40.45 | unusual | — | MPC · JPL |
2015 BH311 | 9.17 | 0.729 | 94.5 | CEN | ![]() |
0.424 | ![]() |
2.49 | 15.85 | unusual | — | MPC · JPL |
2015 FK37 | 441.08 | 0.989 | 156.1 | TNO | ![]() |
-2.507 | ![]() |
4.96 | 877.2 | unusual | — | MPC · JPL |
2015 RK245 | 80.21 | 0.966 | 91.7 | TNO | ![]() |
0.005 | ![]() |
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 | ![]() |
-4.118 | ![]() |
11.45 | 499.1 | — | — | MPC · JPL |
2015 TN178 | 54.26 | 0.956 | 91.1 | TNO | ![]() |
0.059 | ![]() |
2.39 | 106.13 | unusual | — | MPC · JPL |
2015 TS350 | 142.79 | 0.965 | 58 | TNO | — | 1.498 | ![]() |
5.05 | 280.53 | — | — | MPC · JPL |
2015 XN63 | 18.9 | 0.927 | 19.4 | CEN | — | 1.621 | ![]() |
1.37 | 36.42 | unusual | — | MPC · JPL |
2015 XX351 | 14.53 | 0.854 | 159.1 | CEN | ![]() |
-1.269 | ![]() |
2.13 | 26.94 | unusual | — | MPC · JPL |
2015 XR384 | 36.7 | 0.903 | 157.5 | TNO | ![]() |
-1.969 | ![]() |
3.57 | 69.84 | unusual | — | MPC · JPL |
2015 YY18 | 19.41 | 0.831 | 118.2 | CEN | ![]() |
-0.749 | ![]() |
3.28 | 35.53 | unusual | — | MPC · JPL |
2016 AT281 | 63.39 | 0.958 | 22.2 | TNO | — | 1.943 | ![]() |
2.68 | 124.09 | — | — | MPC · JPL |
2016 CO264 | 48.1 | 0.937 | 129.8 | TNO | ![]() |
-1.247 | ![]() |
3.01 | 93.18 | unusual | — | MPC · JPL |
2016 DF2 | 7.2 | 0.538 | 167.1 | CEN | ![]() |
-1.209 | ![]() |
3.32 | 11.07 | unusual | — | MPC · JPL |
2016 EJ203 | 67.43 | 0.96 | 171 | TNO | ![]() |
-1.925 | ![]() |
2.73 | 132.13 | unusual | — | MPC · JPL |
2016 JK24 | 13.06 | 0.661 | 152.3 | CEN | ![]() |
-1.708 | ![]() |
4.43 | 21.69 | unusual | — | MPC · JPL |
2016 LS | 13.32 | 0.606 | 114.3 | CEN | ![]() |
-0.658 | ![]() |
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 | ![]() |
-0.371 | ![]() |
2.9 | 59.22 | unusual | — | MPC · JPL |
2016 TK2 | 9.19 | 0.551 | 92.3 | CEN | ![]() |
0.476 | ![]() |
4.12 | 14.25 | unusual | — | MPC · JPL |
2016 TP93 | 7.39 | 0.555 | 138.3 | CEN | ![]() |
-0.777 | ![]() |
3.29 | 11.49 | unusual | — | MPC · JPL |
2016 US109 | 35.86 | 0.948 | 87.2 | TNO | — | 0.227 | ![]() |
1.86 | 69.86 | unusual | — | MPC · JPL |
2016 VY17 | 11.14 | 0.851 | 148.5 | CEN | ![]() |
-0.845 | ![]() |
1.66 | 20.61 | unusual | — | MPC · JPL |
2016 WS1 | 14.37 | 0.882 | 53 | CEN | — | 1.305 | ![]() |
1.7 | 27.05 | unusual | — | MPC · JPL |
2016 YB13 | 5.45 | 0.407 | 139.8 | other | ![]() |
-0.473 | ![]() |
3.23 | 7.67 | unusual | — | MPC · JPL |
2017 AX13 | 28.65 | 0.883 | 137.2 | CEN | ![]() |
-1.435 | ![]() |
3.35 | 53.95 | unusual | — | MPC · JPL |
2017 CW32 | 191.86 | 0.985 | 152.4 | TNO | ![]() |
-1.855 | ![]() |
2.95 | 380.76 | unusual | — | MPC · JPL |
2017 EM4 | 33.29 | 0.921 | 83.4 | TNO | — | 0.383 | ![]() |
2.65 | 63.93 | unusual | — | MPC · JPL |
2017 GD8 | 43.37 | 0.947 | 74.9 | TNO | — | 0.602 | ![]() |
2.28 | 84.45 | unusual | — | MPC · JPL |
2017 JB6 | 32.6 | 0.883 | 160.9 | TNO | ![]() |
-2.061 | ![]() |
3.82 | 61.38 | unusual | — | MPC · JPL |
2017 MZ4 | 66.8 | 0.952 | 65.8 | TNO | — | 0.973 | ![]() |
3.19 | 130.41 | unusual | — | MPC · JPL |
2017 MB7 | 1711.8 | 0.997 | 55.7 | TNO | — | 1.477 | ![]() |
4.46 | 3419.14 | unusual | — | MPC · JPL |
2017 NM2 | 14.64 | 0.623 | 101.3 | CEN | ![]() |
-0.158 | ![]() |
5.52 | 23.77 | — | — | MPC · JPL |
2017 OX68 | 58.97 | 0.971 | 94.8 | TNO | ![]() |
-0.046 | ![]() |
1.73 | 116.21 | unusual | — | MPC · JPL |
2017 PY24 | 17.35 | 0.924 | 71.8 | CEN | — | 0.734 | ![]() |
1.31 | 33.4 | unusual | — | MPC · JPL |
2017 QO33 | 34.39 | 0.857 | 148.8 | TNO | ![]() |
-2.119 | ![]() |
4.93 | 63.85 | unusual | — | MPC · JPL |
2017 RR2 | 11.6 | 0.782 | 87.1 | CEN | — | 0.543 | ![]() |
2.53 | 20.67 | unusual | — | MPC · JPL |
2017 SV13 | 9.66 | 0.792 | 113.3 | CEN | ![]() |
-0.118 | ![]() |
2.01 | 17.3 | unusual | — | MPC · JPL |
2017 SN33 | 242.29 | 0.992 | 152 | TNO | ![]() |
-1.463 | ![]() |
1.84 | 482.73 | unusual | — | MPC · JPL |
2017 UW51 | 130.29 | 0.976 | 144.2 | TNO | ![]() |
-1.730 | ![]() |
3.14 | 257.44 | unusual | — | MPC · JPL |
2017 UX51 | 30.05 | 0.747 | 90.5 | CEN | ![]() |
0.146 | ![]() |
7.61 | 52.49 | — | — | MPC · JPL |
2017 UR52 | 352.63 | 0.996 | 108.2 | NEO | ![]() |
-0.417 | ![]() |
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 | ![]() |
1.66 | 24.29 | unusual | — | MPC · JPL |
2018 DE4 | 32.31 | 0.926 | 81.3 | TNO | — | 0.445 | ![]() |
2.39 | 62.24 | unusual | — | MPC · JPL |
2018 DF4 | 97.75 | 0.984 | 68.2 | TNO | — | 0.633 | ![]() |
1.6 | 193.91 | unusual | — | MPC · JPL |
2018 KH3 | 94.35 | 0.961 | 46.9 | TNO | — | 1.671 | ![]() |
3.7 | 184.99 | unusual | — | MPC · JPL |
2018 MP8 | 357.96 | 0.989 | 68.3 | TNO | — | 0.909 | ![]() |
3.83 | 712.09 | unusual | — | MPC · JPL |
2018 PL28 | 19.54 | 0.862 | 74.1 | CEN | — | 0.802 | ![]() |
2.69 | 36.39 | unusual | — | MPC · JPL |
2018 SQ13 | 155.88 | 0.981 | 91 | TNO | ![]() |
-0.002 | ![]() |
2.97 | 308.78 | unusual | — | MPC · JPL |
2018 TL6 | 8.15 | 0.788 | 170.9 | CEN | ![]() |
-0.881 | ![]() |
1.72 | 14.57 | unusual | — | MPC · JPL |
A/2018 V3 | 121.44 | 0.989 | 165 | TNO | ![]() |
-1.339 | ![]() |
1.34 | 241.55 | — | — | MPC · JPL |
2018 WB1 | 7.28 | 0.694 | 152.3 | CEN | ![]() |
-0.792 | ![]() |
2.23 | 12.33 | unusual | — | MPC · JPL |
2019 CR | 14.49 | 0.595 | 160.3 | CEN | ![]() |
-2.168 | ![]() |
5.87 | 23.12 | — | — | MPC · JPL |
2019 EJ3 | 24.23 | 0.956 | 139.6 | NEO | ![]() |
-0.754 | ![]() |
1.08 | 47.39 | — | — | MPC · JPL |
A/2019 G2 | 698.71 | 0.997 | 159.2 | TNO | ![]() |
-1.746 | ![]() |
2.29 | 1395.13 | — | — | MPC · JPL |
A/2019 G3 | 17.15 | 0.834 | 156.8 | CEN | ![]() |
-1.541 | ![]() |
2.85 | 31.45 | — | — | MPC · JPL |
2019 HC4 | 8.78 | 0.554 | 134.3 | CEN | ![]() |
-0.916 | ![]() |
3.91 | 13.64 | unusual | — | MPC · JPL |
2019 KE7 | 11.66 | 0.702 | 108.3 | CEN | ![]() |
-0.223 | ![]() |
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 | ![]() |
-0.121 | ![]() |
9.68 | 105.29 | — | — | MPC · JPL |
A/2019 O4 | 32.89 | 0.889 | 115.1 | TNO | ![]() |
-0.817 | ![]() |
3.64 | 62.13 | — | — | MPC · JPL |
2019 PN2 | 25.18 | 0.92 | 113 | CEN | ![]() |
-0.466 | ![]() |
2.01 | 48.35 | — | — | MPC · JPL |
A/2019 Q2 | 59.68 | 0.979 | 159 | NEO | ![]() |
-1.205 | ![]() |
1.26 | 118.11 | — | — | MPC · JPL |
A/2019 T1 | 38.18 | 0.888 | 120.9 | TNO | ![]() |
-1.143 | ![]() |
4.28 | 72.07 | — | — | MPC · JPL |
A/2019 U5 | 22759.43 | 1 | 113.5 | TNO | ![]() |
-0.942 | ![]() |
3.62 | 45515.24 | — | — | MPC · JPL |
2019 YJ6 | 37.68 | 0.932 | 22 | TNO | — | 1.947 | ![]() |
2.56 | 72.8 | — | — | MPC · JPL |
A/2020 A1 | 25.94 | 0.936 | 149 | CEN | ![]() |
-1.152 | ![]() |
1.67 | 50.2 | — | — | MPC · JPL |
A/2020 B1 | 52.32 | 0.967 | 18.5 | TNO | — | 1.641 | ![]() |
1.75 | 102.88 | — | — | MPC · JPL |
2020 BZ12 | 7.7 | 0.922 | 165.5 | NEO | ![]() |
-0.238 | ![]() |
0.6 | 14.79 | — | — | MPC · JPL |
2020 EP | 10.51 | 0.764 | 76.4 | CEN | — | 0.927 | ![]() |
2.48 | 18.54 | — | — | MPC · JPL |
A/2020 F7 | 811.54 | 0.993 | 93.9 | TNO | ![]() |
-0.190 | ![]() |
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 | ![]() |
-1.458 | ![]() |
2.58 | 680.84 | — | — | MPC · JPL |
2020 HB11 | 16.55 | 0.708 | 147.3 | CEN | ![]() |
-1.806 | ![]() |
4.84 | 28.26 | — | — | MPC · JPL |
2020 KD6 | 13.1 | 0.872 | 38.7 | CEN | — | 1.611 | ![]() |
1.68 | 24.52 | — | — | MPC · JPL |
2020 KH7 | 7.94 | 0.502 | 106.2 | CEN | ![]() |
0.060 | ![]() |
3.95 | 11.93 | — | — | MPC · JPL |
2020 KU7 | 34.8 | 0.879 | 103.8 | TNO | ![]() |
-0.439 | ![]() |
4.2 | 65.41 | — | — | MPC · JPL |
2020 ML1 | 54.03 | 0.953 | 82.5 | TNO | — | 0.351 | ![]() |
2.54 | 105.53 | — | — | MPC · JPL |
2020 OR5 | 6.23 | 0.376 | 166.6 | CEN | ![]() |
-1.138 | ![]() |
3.89 | 8.58 | — | — | MPC · JPL |
2020 OS5 | 6.9 | 0.684 | 155.8 | CEN | ![]() |
-0.779 | ![]() |
2.18 | 11.63 | — | — | MPC · JPL |
2020 OP7 | 28.65 | 0.895 | 79.5 | CEN | — | 0.564 | ![]() |
3 | 54.31 | — | — | MPC · JPL |
2020 PV6 | 39.97 | 0.943 | 128.2 | TNO | ![]() |
-1.013 | ![]() |
2.29 | 77.65 | — | — | MPC · JPL |
2020 QN6 | 311.26 | 0.985 | 76.7 | TNO | — | 0.639 | ![]() |
4.82 | 617.7 | — | — | MPC · JPL |
2020 QO6 | 18.9 | 0.874 | 80.5 | CEN | — | 0.583 | ![]() |
2.39 | 35.41 | — | — | MPC · JPL |
2020 SJ5 | 18.2 | 0.856 | 77.4 | CEN | — | 0.708 | ![]() |
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 |
Notes
- 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:[lower-alpha 2]
aJ/a + 2(cos i) × √ a/aJ × (1-e2)- Note
($a_j / $a) + (2 * cos(deg2rad($i))) * sqrt(($a/$a_j) * (1 - $e * $e)).
See also
References
- Jewitt, David (August 2013). "The DAMOCLOIDS". UCLA, Department of Earth and Space Sciences. Retrieved 14 February 2014. (2013 list / 2011 list / 2010 list)
- Akimasa Nakamura and bas (2 May 2009). "List of Damocloids (Oort cloud asteroids)". Lowell Observatory. Retrieved 15 February 2017.
- 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.
- "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
- "JPL Small-Body Database Search Engine: asteroids and T-Jupiter <= 2 and data-arc span > 30 (d)". JPL Solar System Dynamics. Retrieved 1 June 2019.
- "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")
- "List Of Other Unusual Objects". Minor Planet Center. Retrieved 1 June 2019.
- "JPL Small-Body Orbital Elements – ASCII Files". JPL Solar System Dynamics. Retrieved 19 October 2020.
- 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.
External links
- David Jewitt, A first look at the Damocloids, January 2005