+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101939 (1999 RN23) Classification: Main-belt Asteroid          SPK-ID: 2101939 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1697485805119054 3.6777e-08   a 2.22535157985556 7.6411e-09 au q 1.847601308035152 8.1407e-08 au i 1.815210680304826 3.6326e-06 deg node 111.84916892898 0.00017724 deg peri 220.2118912724558 0.00017786 deg M 103.4908311567872 1.5621e-05 deg tp 2458651.925388220315 (2019-Jun-17.42538822) 5.2484e-05 TDB period 1212.540848672631 3.32 6.2451e-06 1.71e-08 d yr n .2968972141384696 1.5292e-09 deg/d Q 2.603101851675967 8.9381e-09 au   Orbit Determination Parameters    # obs. used (total)      682      data-arc span      7735 days (21.18 yr)      first obs. used      1999-08-22      last obs. used      2020-10-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52048      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:57:38   Additional Information  Earth MOID = .837459 au   Jupiter MOID = 2.74144 au   T_jup = 3.627  [ hide covariance matrix ] Orbital Elements at Epoch 2457171.5 (2015-May-29.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1704133296879469 3.6879e-08   q 1.845640077026838 8.1699e-08 au tp 2457440.021483723552 (2016-Feb-21.52148372) 5.2245e-05 TDB node 111.8678637578544 0.00017733 deg peri 220.325123617355 0.00017795 deg i 1.81500487639224 3.6318e-06 deg   Orbit Determination Parameters    # obs. used (total)      682      data-arc span      7735 days (21.18 yr)      first obs. used      1999-08-22      last obs. used      2020-10-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52048      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:57:38   Additional Information  Jupiter MOID = 2.74144 au   T_jup = 3.627  Orbit Covariance (6×6)   e q tp node peri i e 1.360082796689977E-15 -3.004000426504425E-15 8.54146452359303E-13 1.65442133062775E-14 2.274065917943885E-13 -9.019076783719725E-16 q -3.004000426504425E-15 6.674754872605155E-15 -1.925211329498743E-12 -3.668465359041378E-14 -5.171561790692653E-13 2.040247574252941E-15 tp 8.54146452359303E-13 -1.925211329498743E-12 2.729529112602895E-9 2.930158505840926E-11 8.106569927043815E-10 -1.22451935492955E-12 node 1.65442133062775E-14 -3.668465359041378E-14 2.930158505840926E-11 3.144603720554605E-8 -3.14211732211191E-8 -1.604638919685167E-10 peri 2.274065917943885E-13 -5.171561790692653E-13 8.106569927043815E-10 -3.14211732211191E-8 3.166458312674034E-8 1.600021114293896E-10 i -9.019076783719725E-16 2.040247574252941E-15 -1.22451935492955E-12 -1.604638919685167E-10 1.600021114293896E-10 1.319010259489541E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.6   n/a MPO502728   101939 (1999 RN23)          Discovered 1999-Sep-07 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 03:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin