+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70163 (1999 NW46) Classification: Main-belt Asteroid          SPK-ID: 2070163 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06837692608987719 4.9765e-08   a 2.238309678813315 8.8567e-09 au q 2.08526094333884 1.1238e-07 au i 7.459354746480864 5.6482e-06 deg node 146.8665671255434 2.768e-05 deg peri 163.5897416449375 4.062e-05 deg M 57.58172237128516 2.9988e-05 deg tp 2458804.858566477174 (2019-Nov-17.35856648) 0.00010178 TDB period 1223.14708848202 3.35 7.2597e-06 1.988e-08 d yr n .2943227379519629 1.7469e-09 deg/d Q 2.39135841428779 9.4623e-09 au   Orbit Determination Parameters    # obs. used (total)      975      data-arc span      8265 days (22.63 yr)      first obs. used      1996-09-08      last obs. used      2019-04-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56817      source      ORB      producer      Otto Matic      solution date      2019-Jul-13 09:13:57   Additional Information  Earth MOID = 1.07227 au   Jupiter MOID = 2.77136 au   T_jup = 3.622  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.5   n/a MPO436273   70163 (1999 NW46)          Discovered 1999-Jul-13 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-24 17:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin