+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   (1999 LE31) Classification: Centaur          SPK-ID: 3021708 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 4 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4682401777007241 1.7971e-05   a 8.122640556493339 0.00030875 AU q 4.319293898921789 4.5485e-05 AU i 151.8067228960766 4.404e-05 deg node 291.9894733869527 0.00017293 deg peri 32.32300947642877 0.001868 deg M 223.1857363982866 0.013202 deg tp 2459613.961907787366 (2022-Feb-03.46190779) 0.49328 JED period 8455.597072621045 23.15 0.4821 0.00132 d yr n .0425753494292755 2.4275e-06 deg/d Q 11.92598721406489 0.00045331 AU   Orbit Determination Parameters    # obs. used (total)      127      data-arc span      409 days (1.12 yr)      first obs. used      1999-05-17      last obs. used      2000-06-29      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      3      fit RMS      .50742      data source      ORB      producer      Otto Matic      solution date      2011-Sep-14 19:35:47   Additional Information  Earth MOID = 3.34019 AU   T_jup = -1.305  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.361 mag .53112 4 autocmod 2.5a 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 13:44 10:43 Jupiter 1.9540678043792 1.94838970501271 1.9597519743041 26.5129804802463 26.4966262258207 2433588.072440960 643.63109771594 121039.814267076 3339.21765142941 -27.109813552286 16251.890263001 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 1974-Mar-27 06:12 05:53 Jupiter 1.45680267237312 1.45395680790937 1.45965051674137 27.1908222756163 27.169430700567 2442133.758944975 353.304141288361 63300.7255938561 3718.65060326287 -27.833390150282 11433.5715328632 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 1997-Aug-21 22:38 00:10 Jupiter 1.01098233837312 1.01092628006965 1.01103843152207 27.7844130887692 27.7542423439874 2450682.443483891 10.4430057835205 6092.74887423893 994.928280667364 79.6713893905616 63285.4383210236 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2005-Mar-24 10:16 00:24 Saturn 1.07797958607592 1.07719265697943 1.07876654562686 17.4600683876383 17.4465883754657 2453453.928000248 24.7477815021041 17125.1773256391 2117.32842298328 6.88129395760457 5757.68855873912 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2021-Jan-10 10:08 06:28 Jupiter 0.64307321129661 0.641289789270814 0.644870136503766 28.3202680636825 28.2737207911982 2459224.922522261 388.326173559546 72586.0525060279 3844.91403246728 -59.5977325835217 9269.33932906689 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2044-Jun-13 15:01 14:06 Jupiter 0.518019280567435 0.517425450138383 0.518695444788303 28.7169164966204 28.6599207520338 2467780.126222693 846.767809426446 147834.170353347 3804.6365851991 84.0086760404515 8795.27519885404 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2067-Nov-01 08:15 1_03:17 Jupiter 0.696982957011395 0.689201913911114 0.704879514170167 29.0673120112918 29.0254730778841 2476320.844105816 1637.90584960003 266292.366512719 3694.93228729528 48.708927450296 9296.86091493498 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2091-Feb-15 09:58 1_15:52 Jupiter 1.09498611861179 1.08203839759305 1.10799811810339 29.3238406687565 29.2974493570406 2484827.915412681 2392.5399094058 349633.988543797 3433.72603010424 33.5142714871899 11634.2172118727 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2114-May-13 12:15 2_00:53 Jupiter 1.54493149307918 1.5307434399223 1.55916809500779 29.3735466766393 29.3548756843101 2493315.010833354 2933.70305416383 366865.429224737 2953.35805485401 31.3164149921341 17996.7124184654 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2122-Apr-23 08:47 1_07:14 Saturn 1.99152800201025 1.98206478600654 2.00104401665029 16.7107562270224 16.7031337588264 2496216.866381895 1874.19707877907 286071.203599925 5149.77853645664 47.357236915135 18152.2821818135 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 2137-Jul-19 17:47 2_05:58 Jupiter 1.95325998937279 1.94090484799079 1.96566689728676 29.1633498139393 29.148476482236 2501783.241529493 3238.93357275584 323005.334275444 2204.11117703248 37.8015650738804 35758.3938503276 T 4 CATAB v2.0c-linF95 2011-Sep-15 08:40:14 2011-Sep-15 12:53 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2013-Jun-20 04:12 UT (server date/time)   Site Manager:   Donald K. 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