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91862 (1999 US20)
Classification: Main-belt Asteroid          SPK-ID: 2091862
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .135371924659077 4.9291e-08  
a 3.000261103360478 2.1199e-08 au
q 2.594109983318805 1.506e-07 au
i 2.131479388885259 5.4357e-06 deg
node 95.02920194588739 0.00012858 deg
peri 333.0244945057204 0.00012988 deg
M 307.483799583263 1.7663e-05 deg
tp 2459277.403089052219
(2021-Mar-03.90308905)
9.392e-05 TDB
period 1898.178300557879
5.20
2.0118e-05
5.508e-08
d
yr
n .1896555238747567 2.0101e-09 deg/d
Q 3.406412223402152 2.4069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      457  
   data-arc span      8959 days (24.53 yr)  
   first obs. used      1994-10-31  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52854  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:04:49  

Additional Information
 Earth MOID = 1.60842 au 
 Jupiter MOID = 1.87765 au 
 T_jup = 3.238 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO412708  

91862 (1999 US20)          Discovered 1999-Oct-31 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1925-Oct-26 03:54 00:03 Jupiter 1.92679884306383 1.9267981870243 1.92679949910381 2.74958907230123 2.58477044548418 2424449.662320111 2.86160480209736 87.8159721505746 10.5497870511978 86.7128406245591 2118828.96263582 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04
1971-Dec-27 08:13 00:01 Jupiter 1.90366378600171 1.9036633182929 1.90366425371031 2.2777568749727 2.0732317065948 2441312.842650637 1.38365645900769 54.9264846317498 6.50697866550456 87.7601140846734 2385565.53458152 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04
2009-Feb-21 20:10 < 00:01 Jupiter 1.93640060299592 1.93640014355644 1.93640106243529 2.89800810554249 2.74291974812737 2454884.340575545 0.295589074869185 46.48078930229 12.4875395990883 87.6024764110797 2698511.76045974 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04
2055-Apr-24 15:21 00:01 Jupiter 1.89377854314002 1.89377807578604 1.89377901049388 2.30074462352847 2.09735406503414 2471747.139768099 1.36253119968028 51.3805015447304 9.9382757317412 89.6483795488429 2383917.15357031 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04
2092-Jun-21 02:45 00:03 Jupiter 1.95802812084339 1.95802743487037 1.95802880681707 3.0909496815834 2.94767549463886 2485319.614276475 2.51131961814171 101.130739772584 14.4375449367761 83.5349001827927 2323029.15897237 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04
2138-Aug-22 18:48 00:04 Jupiter 1.87693145193437 1.87693097619174 1.87693192767689 2.31877315330325 2.11521818920212 2502182.283426567 4.05303702669899 71.3436600786604 16.8279595908015 -76.7232732846403 2221882.11676131 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04
2175-Oct-19 07:39 00:05 Jupiter 1.98608771904109 1.98608638554603 1.98608905254281 3.31043747316651 3.17899991626222 2515753.818750646 5.12916694313712 211.841741590624 16.4400775197421 79.9932868059328 2376984.75363387 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04
2184-Oct-23 03:55 00:05 Jupiter 1.99127265419077 1.99127102358475 1.99127428479905 2.47671340612608 2.29855921213398 2519045.663455218 5.47954990732626 154.050277026711 17.6300488475458 73.2679233337193 1995057.17156662 T 19 CATAB v2.0e-lin.ifort 2019-May-30 06:04:53 2019-May-30 06:04

Alternate Designations
 1999 US20 = 2001 CE10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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