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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1353719698758878 4.5199e-08  
a 3.00026108773899 1.797e-08 au
q 2.594109834149789 1.4166e-07 au
i 2.131472022195654 4.5315e-06 deg
node 95.02922708726152 0.0001098 deg
peri 333.0244683814008 0.00011098 deg
M 307.483808162708 1.514e-05 deg
tp 2459277.403041652598
(2021-Mar-03.90304165)
8.0284e-05 TDB
period 1898.178285732984
5.20
1.7054e-05
4.669e-08
d
yr
n .1896555253559787 1.7039e-09 deg/d
Q 3.406412341328191 2.0403e-08 au
  Orbit Determination Parameters
   # obs. used (total)      564  
   data-arc span      9491 days (25.98 yr)  
   first obs. used      1994-10-31  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50895  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:38:13  

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 00:02 Jupiter 1.92679890496944 1.92679835892876 1.92679945101033 2.74958956070017 2.58477097049027 2424449.662797648 2.48431382084802 76.3541518095605 9.50401217523878 87.4326568444695 2451147.00993693 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38
1971-Dec-27 08:14 00:01 Jupiter 1.90366363947371 1.90366318929075 1.90366408965656 2.27775609516817 2.07323083334305 2441312.842851688 1.21102038971876 48.5191045848017 5.72523652628854 87.7739118858192 2561674.45558532 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38
2009-Feb-21 20:10 < 00:01 Jupiter 1.93640057882752 1.93640016806623 1.93640098958869 2.89800782067375 2.74291944516137 2454884.340587143 0.270546917569785 38.2852066470673 11.0513169997175 87.7693464387795 2976745.37535896 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38
2055-Apr-24 15:21 00:01 Jupiter 1.89377846516402 1.89377806253921 1.89377886778873 2.30074379015464 2.09735314206335 2471747.139505363 1.1229519506901 45.5344851535392 7.99706633698817 89.5077374439499 2535215.09346121 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38
2092-Jun-21 02:44 00:02 Jupiter 1.9580279606331 1.95802735207578 1.95802856919087 3.09094831298659 2.94767404751233 2485319.613820055 2.08016493542877 81.9262643341142 12.8627766926153 83.046470998215 2565481.93274342 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38
2138-Aug-22 18:47 00:03 Jupiter 1.8769313862033 1.87693097455127 1.87693179785512 2.31877200616427 2.1152169241982 2502182.282697747 3.40897088318587 61.043733917857 14.4195223267435 -77.5757146645718 2306629.97550166 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38
2175-Oct-19 07:38 00:04 Jupiter 1.98608738813049 1.98608624796666 1.98608852829872 3.31043482317361 3.17899713435164 2515753.817837119 4.30614092840878 175.932882872749 14.3613956745016 79.7844259304694 2701433.8665399 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38
2184-Oct-23 03:54 00:05 Jupiter 1.99127294048199 1.99127165822008 1.99127422274559 2.47671378614828 2.2985596482169 2519045.662468190 4.64114681797666 129.690549958129 14.9689001949483 73.8221929732104 2480249.41468582 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 20:38:16 2020-Nov-12 20:38

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