+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11415 (1999 JG81) Classification: Main-belt Asteroid          SPK-ID: 2011415 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .200690873102094 2.7214e-08   a 2.258512187258716 5.954e-09 au q 1.805249404486044 6.2375e-08 au i 6.500332492070579 3.1005e-06 deg node 154.5829152483273 2.9893e-05 deg peri 163.9746802877678 3.107e-05 deg M 95.20849685144765 9.2009e-06 deg tp 2458872.627273389826 (2020-Jan-24.12727339) 3.1132e-05 TDB period 1239.744198081706 3.39 4.9024e-06 1.342e-08 d yr n .2903824841907218 1.1483e-09 deg/d Q 2.711774970031387 7.1489e-09 au   Orbit Determination Parameters    # obs. used (total)      2151      data-arc span      17722 days (48.52 yr)      first obs. used      1972-07-13      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45638      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:00:28   Additional Information  Earth MOID = .791402 au   Jupiter MOID = 2.60396 au   T_jup = 3.586  [ hide covariance matrix ] Orbital Elements at Epoch 2457098.5 (2015-Mar-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2003271330887998 2.7156e-08   q 1.806843294700989 6.2223e-08 au tp 2457633.433342763366 (2016-Sep-01.93334276) 2.9635e-05 TDB node 154.6179719152123 2.9898e-05 deg peri 163.9686223391696 3.1085e-05 deg i 6.498527318578892 3.0999e-06 deg   Orbit Determination Parameters    # obs. used (total)      2151      data-arc span      17722 days (48.52 yr)      first obs. used      1972-07-13      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45638      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:00:28   Additional Information  Jupiter MOID = 2.60396 au   T_jup = 3.586  Orbit Covariance (6×6)   e q tp node peri i e 7.374339557430346E-16 -1.684824499432823E-15 -2.07887383534382E-14 -1.031806637976019E-15 5.648166453302381E-15 -3.116752585441655E-17 q -1.684824499432823E-15 3.871675245942278E-15 8.256415464952444E-14 1.809445630502901E-15 -5.444732123979829E-15 1.620480900413579E-16 tp -2.07887383534382E-14 8.256415464952444E-14 8.782289390490856E-10 -5.695337127014687E-12 2.627450668977832E-10 7.219969702794429E-13 node -1.031806637976019E-15 1.809445630502901E-15 -5.695337127014687E-12 8.939066390772629E-10 -8.893332340802825E-10 6.081415592909348E-12 peri 5.648166453302381E-15 -5.444732123979829E-15 2.627450668977832E-10 -8.893332340802825E-10 9.662547049294026E-10 -5.864158507422838E-12 i -3.116752585441655E-17 1.620480900413579E-16 7.219969702794429E-13 6.081415592909348E-12 -5.864158507422838E-12 9.609482917944853E-12 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.29   n/a E2021B10   11415 (1999 JG81)          Discovered 1999-May-14 by LINEAR at Socorro Reference: 19990831/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 JG81 = 1972 NV = 1972 RT2 = 1989 RZ4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-01 15:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin