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JPL Small-Body Database Browser
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(2012 US18)
Classification: Apollo [NEO]          SPK-ID: 3612646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3552721017662898 0.001102  
a 1.193935311108728 0.0014841 au
q .769763403758141 0.00035891 au
i 3.541434765299278 0.009263 deg
node 205.4080559428157 0.016142 deg
peri 266.1162270849107 0.015056 deg
M 193.3745087060317 2.5946 deg
tp 2459617.050762847975
(2022-Feb-06.55076285)
3.8455 TDB
period 476.5073699629373
1.30
0.88846
0.002432
d
yr
n .7554972340259937 0.0014086 deg/d
Q 1.618107218459315 0.0020113 au
  Orbit Determination Parameters
   # obs. used (total)      25  
   data-arc span      3 days  
   first obs. used      2012-10-18  
   last obs. used      2012-10-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .39111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 06:59:50  

Additional Information
 Earth MOID = .00411757 au 
 Jupiter MOID = 3.50352 au 
 T_jup = 5.252 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 28.6   n/a MPO240175  

[ hide close-approach data ]
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
1983-Apr-06 04:01 8_07:54 Earth 0.0124006714844149 0.0120144068730826 0.121637649012605 10.0776890418035 10.0563455072971 2445430.667074691 11994.4295890819 5884186.11995641 83.86722344214 75.7174628851135 22147.8825838706 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
1986-Nov-17 03:29 5_11:22 Earth 0.145907219030387 0.129414774945056 0.162452872501312 6.74986545385351 6.74715945553034 2446751.644986135 7882.09259067994 835379.578432867 209.512988205032 9.59066848575137 14563.6132744953 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
1987-Jun-01 23:54 08:56 Earth 0.485939987856588 0.481904778225477 0.489981550721727 8.83506309194768 8.83444245829986 2446948.495983948 536.343802369594 219614.766877705 674.717053352579 23.5178687235023 36415.2870610736 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
1990-Sep-27 21:11 5_01:45 Earth 0.482991287210315 0.395192000452338 0.570804240306243 24.299252510145 24.2990254807065 2448162.382780312 7304.90980221439 4380410.12737185 75.2120896660198 1.67054189540805 24965.1996939461 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2008-Aug-24 21:35 6_03:58 Earth 0.491902826139423 0.467137492711418 0.516694494652154 8.94104472163672 8.94043887948535 2454703.399405797 8877.58526223285 1248571.72729699 770.742839869191 8.29710466402517 9227.3374128217 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2012-Oct-22 10:03 < 00:01 Moon 0.00418608132242613 0.00416323706557163 0.00420898669931806 11.0160027674925 11.0152920433168 2456222.919009035 0.421427345030302 1391.90971266979 6.70190257073527 -34.9762343204175 49854.0770057204 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2012-Oct-22 11:10 < 00:01 Earth 0.00416435966823607 0.00413633888993759 0.00419237569878438 9.99209581009103 9.92785576420444 2456222.964948301 0.356941053498568 1379.34168133252 6.91965751350036 -0.221069181142472 286.345891848065 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2027-Oct-01 18:27 3_03:42 Mars 0.0955706683574087 0.0933719438207053 0.133066204089266 8.95796150193104 8.95762709098501 2461680.268875028 4541.83813037988 3713924.89631086 758.604705411014 77.7267229624451 17940.4190472487 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2029-Oct-13 09:18 1_19:43 Earth 0.167587500809539 0.104701777978203 0.230478557192791 14.9194743665499 14.9184086720589 2462422.887558904 2623.1889561993 3136344.09321671 166.627561330214 -0.966840916068157 2239.34505843993 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2031-Mar-22 00:42 19:24 Venus 0.0931502849547667 0.0759380999286296 0.111374849268195 7.11406306381994 7.11078537963569 2462947.529318353 1163.81229410122 1007908.35297119 751.740791360634 28.2622589636061 6444.49935311189 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2035-Apr-28 12:19 2_20:38 Earth 0.440377034741052 0.384857686473522 0.495896248009191 22.954161081374 22.9538974914757 2464446.013237993 4118.48369819058 2768495.36277443 148.664572764754 0.137105288784105 913.397534760444 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2046-Oct-04 20:38 9_14:42 Earth 0.343858761600725 0.168999598364673 0.518799324332454 20.1438041717717 20.1434194959253 2468623.359395937 13841.7035144282 8725538.49531286 41.8667669615646 1.53472651020905 28935.6092769889 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2065-Apr-30 10:17 5_16:36 Earth 0.481000109144423 0.319515288035104 0.642483632359228 24.1726518043201 24.1724226410852 2475405.928130739 8196.05706580116 8052466.37809047 161.456157990423 0.076724181268379 495.503928473129 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2095-Apr-23 04:46 3_07:30 Earth 0.319034003272266 0.216088146222396 0.421979882044465 19.3621704639486 19.3617391175448 2486355.698737426 4770.24686062157 5133495.88901436 100.789073965501 0.384473510225604 2749.25245485554 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2096-Jun-02 20:46 1_12:48 Venus 0.130230633002776 0.105344780295743 0.155114997285892 9.56965634132201 9.56791373616165 2486762.365547677 2207.96245262378 1240725.46664183 1354.36762746986 0.139423075522436 25.37610159703 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
2098-Sep-03 01:20 5_11:03 Earth 0.454631000067734 0.404165105714848 0.5050955623459 8.3502463544052 8.34954445920005 2487584.555821821 7863.00952976375 2516197.6468251 654.108848047406 -0.351880751099725 404.532533217425 T 6 CATAB v2.0g-lin.ifort 2021-Apr-15 06:59:50 2021-Apr-15 06:59
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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