+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101845 (1999 JL74) Classification: Main-belt Asteroid          SPK-ID: 2101845 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09690831395447477 9.1381e-08   a 2.678046178004724 1.9447e-08 au q 2.418521238202061 2.5416e-07 au i 14.5949642543104 5.1121e-06 deg node 67.18197188575894 1.9737e-05 deg peri 106.4354256579446 3.5407e-05 deg M 332.1386294584151 2.5989e-05 deg tp 2459124.386930956722 (2020-Oct-01.88693096) 0.00011566 TDB period 1600.757402721895 4.38 1.7436e-05 4.774e-08 d yr n .2248935406376153 2.4497e-09 deg/d Q 2.937571117807387 2.1332e-08 au   Orbit Determination Parameters    # obs. used (total)      784      data-arc span      7682 days (21.03 yr)      first obs. used      1999-05-08      last obs. used      2020-05-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57327      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:58:12   Additional Information  Earth MOID = 1.46576 au   Jupiter MOID = 2.14263 au   T_jup = 3.325  [ hide covariance matrix ] Orbital Elements at Epoch 2457221.5 (2015-Jul-18.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09768679473636407 9.1705e-08   q 2.415651985877137 2.5521e-07 au tp 2457526.265874841726 (2016-May-17.76587484) 0.00011335 TDB node 67.23844127602746 1.9746e-05 deg peri 107.0006905371433 3.4885e-05 deg i 14.59338667919043 5.1109e-06 deg   Orbit Determination Parameters    # obs. used (total)      784      data-arc span      7682 days (21.03 yr)      first obs. used      1999-05-08      last obs. used      2020-05-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57327      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:58:12   Additional Information  Jupiter MOID = 2.14263 au   T_jup = 3.325  Orbit Covariance (6×6)   e q tp node peri i e 8.409848899803848E-15 -2.336323963616185E-14 3.023107734177886E-12 1.835956055741061E-14 1.249950249932637E-12 -4.178554460063812E-14 q -2.336323963616185E-14 6.512962461769505E-14 -8.223480421857601E-12 -5.14494188887681E-14 -3.443722869118465E-12 1.177752406150198E-13 tp 3.023107734177886E-12 -8.223480421857601E-12 1.28476860783153E-8 -1.226162341144009E-11 3.220608950501766E-9 -3.181825719176202E-12 node 1.835956055741061E-14 -5.14494188887681E-14 -1.226162341144009E-11 3.899168992380023E-10 -3.786595440102745E-10 -1.316976664688033E-11 peri 1.249950249932637E-12 -3.443722869118465E-12 3.220608950501766E-9 -3.786595440102745E-10 1.216940085068151E-9 9.127335928999171E-12 i -4.178554460063812E-14 1.177752406150198E-13 -3.181825719176202E-12 -1.316976664688033E-11 9.127335928999171E-12 2.612107294366488E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.1   n/a MPO381892   101845 (1999 JL74)          Discovered 1999-May-12 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1999 JL74 = 2001 WS30  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-18 08:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin