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(1999 LE31)
Classification: Centaur          SPK-ID: 3021708
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4664840729004481 4.4203e-07  
a 8.12922035586783 7.8737e-07 au
q 4.337068534757374 3.9931e-06 au
i 151.8116871682055 1.7692e-05 deg
node 292.1282413881709 4.2339e-05 deg
peri 32.36205564259753 7.3173e-05 deg
M 333.8067449713624 3.4676e-05 deg
tp 2459616.468837770975
(2022-Feb-05.96883777)
0.00087635 TDB
period 8465.873422570368
23.18
0.00123
3.368e-06
d
yr
n .04252366909245597 6.178e-09 deg/d
Q 11.92137217697829 1.1547e-06 au
  Orbit Determination Parameters
   # obs. used (total)      145  
   data-arc span      7756 days (21.23 yr)  
   first obs. used      1999-05-17  
   last obs. used      2020-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54928  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-27 17:23:54  

Additional Information
 Earth MOID = 3.35781 au 
 Jupiter MOID = .5176 au 
 T_jup = -1.309 
[ 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 12.5   n/a MPO456491  
diameter diameter 16.8 km 4.2 Fernandez et al. (2005) Astron.J. 130:308-318  
geometric albedo albedo 0.056   0.026 Fernandez et al. (2005) Astron.J. 130:308-318  

[ 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
1950-Nov-02 07:03 00:06 Jupiter 1.95288298544927 1.95286773501597 1.95289823588946 26.5146577842948 26.4982946408638 2433587.793461737 6.41973636194894 784.503739403887 240.51974685825 -14.9284966038531 496174.288077208 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
1974-Mar-27 02:35 00:05 Jupiter 1.45621105501138 1.45620046504738 1.45622164497588 27.1916638720838 27.1702642662092 2442133.607736391 4.67237588135091 529.91317215231 210.726204601538 5.17102644699551 431564.34015048 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
1997-Aug-21 22:40 00:02 Jupiter 1.01098604025099 1.01097938536401 1.01099269515101 27.7844371136013 27.754266506201 2450682.444631352 2.39416518295937 407.262514612422 212.500150657117 42.8135885887416 562099.803627161 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2005-Mar-24 10:34 00:05 Saturn 1.07817066790771 1.07816154326367 1.07817979261513 17.4599850203858 17.4465073482885 2453453.940389639 5.04244556831494 688.230737034679 273.843011482619 -54.862426143948 522358.772372796 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2021-Jan-10 14:13 < 00:01 Jupiter 0.643457901467829 0.643452841925774 0.643462961038267 28.3196008106226 28.2730802924906 2459225.092662639 0.974056961714203 586.809487194853 230.959526574923 79.1610602495977 404962.350226357 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2044-Jun-13 23:45 00:06 Jupiter 0.51792111932924 0.51791026358099 0.517931975637123 28.7157869824967 28.6587781794116 2467780.489260318 5.51556906316905 1056.81883445 190.102731327937 60.8274066420709 347417.383021578 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2067-Nov-02 00:57 00:13 Jupiter 0.695399817570186 0.695369129156702 0.695430506528734 29.065818114848 29.0238817051925 2476321.539739801 13.1447123137827 1816.24796432703 178.161424920622 32.7744425663176 306970.240150593 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2091-Feb-16 10:22 00:20 Jupiter 1.09233553595581 1.09229173653587 1.09237933551267 29.3226549703908 29.2961985204249 2484828.931888509 19.9828491265066 2268.30095660694 186.308548817741 15.7290230327423 236095.683320472 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2114-May-14 18:25 00:25 Jupiter 1.54201690374059 1.54197121958959 1.54206258790484 29.3736109026585 29.354904650142 2493316.267134486 24.9590721950977 2289.27306763629 212.530896142478 5.71874160072498 141556.873628336 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2122-Apr-24 03:45 00:20 Saturn 1.98960661904804 1.98957199136392 1.98964124736335 16.7118028714551 16.7041735267706 2496217.656140884 20.4087657157818 2521.85072924889 473.361396621326 47.8977843151344 510666.395697784 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
2137-Jul-21 03:36 00:28 Jupiter 1.95071294114044 1.95067416351898 1.95075171876534 29.1654362326359 29.1505445421377 2501784.650109198 28.1469444279672 1938.09543731863 252.601117146421 -3.90847209779002 169430.823166715 T 11 CATAB v2.0f-lin.ifort 2020-Aug-27 17:23:56 2020-Aug-27 17:24
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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