+ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06837684530139722 3.7752e-08   a 2.238309678598048 7.4038e-09 au q 2.085261123967929 8.5744e-08 au i 7.459360647506259 4.1419e-06 deg node 146.8665822038734 2.6594e-05 deg peri 163.5897406569914 3.7181e-05 deg M 57.58171195093083 2.5711e-05 deg tp 2458804.858601909914 (2019-Nov-17.35860191) 8.738e-05 TDB period 1223.147088305568 3.35 6.0688e-06 1.662e-08 d yr n .2943227379944221 1.4603e-09 deg/d Q 2.391358233228167 7.9101e-09 au   Orbit Determination Parameters    # obs. used (total)      1167      data-arc span      8835 days (24.19 yr)      first obs. used      1996-09-08      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54321      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:54:22   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 ] 2021-Jan-19 05:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin