+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120870 (1998 RM16) Classification: Main-belt Asteroid          SPK-ID: 2120870 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1635421124680391 4.0952e-08   a 2.170989070236321 9.0307e-09 au q 1.815940931544849 9.2928e-08 au i 2.126512063367872 3.6983e-06 deg node 283.4937994909278 0.00010333 deg peri 39.68853340002135 0.00010386 deg M 357.2537791117462 1.1753e-05 deg tp 2459209.412875657624 (2020-Dec-25.91287566) 3.817e-05 TDB period 1168.382066595159 3.20 7.2902e-06 1.996e-08 d yr n .3081183889180138 1.9225e-09 deg/d Q 2.526037208927793 1.0508e-08 au   Orbit Determination Parameters    # obs. used (total)      550      data-arc span      8534 days (23.36 yr)      first obs. used      1997-03-03      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54891      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 17:54:08   Additional Information  Earth MOID = .802165 au   Jupiter MOID = 2.77311 au   T_jup = 3.670  [ hide covariance matrix ] Orbital Elements at Epoch 2457172.5 (2015-May-30.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1637441935971174 4.1041e-08   q 1.814939565707371 9.3057e-08 au tp 2456872.419051632987 (2014-Aug-02.91905163) 3.4251e-05 TDB node 283.6160991135569 0.00010321 deg peri 39.43502315709591 0.00010373 deg i 2.128152155460616 3.7008e-06 deg   Orbit Determination Parameters    # obs. used (total)      550      data-arc span      8534 days (23.36 yr)      first obs. used      1997-03-03      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54891      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 17:54:08   Additional Information  Jupiter MOID = 2.77311 au   T_jup = 3.670  Orbit Covariance (6×6)   e q tp node peri i e 1.68436730224814E-15 -3.809862696491307E-15 1.174628935746764E-13 -5.056155421813747E-15 4.246152857785934E-14 -1.241772954904216E-15 q -3.809862696491307E-15 8.659550876752059E-15 -2.377611899002629E-13 1.270029178323671E-14 -8.605054383073111E-14 2.896867254624621E-15 tp 1.174628935746764E-13 -2.377611899002629E-13 1.173132668193041E-9 8.452313100724899E-12 3.69858968028559E-10 1.065120653632653E-14 node -5.056155421813747E-15 1.270029178323671E-14 8.452313100724899E-12 1.065212580809707E-8 -1.064159326418325E-8 6.420369901487444E-11 peri 4.246152857785934E-14 -8.605054383073111E-14 3.69858968028559E-10 -1.064159326418325E-8 1.07606201198927E-8 -6.415289895265755E-11 i -1.241772954904216E-15 2.896867254624621E-15 1.065120653632653E-14 6.420369901487444E-11 -6.415289895265755E-11 1.369579105742113E-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 16.93   n/a E2021B55   120870 (1998 RM16)          Discovered 1998-Sep-11 by ODAS at Caussols Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ show close-approach data ] Alternate Designations  1998 RM16 = 1997 EC29  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 09:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin