+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160597 (1999 RQ159) Classification: Main-belt Asteroid          SPK-ID: 2160597 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2374575986303128 8.4305e-08   a 2.532226490975302 8.8812e-09 au q 1.930930069240243 2.1531e-07 au i 2.968019068661546 7.3398e-06 deg node 102.3095534686301 0.00010625 deg peri 248.5371204988292 0.00010767 deg M 97.82568371766679 1.68e-05 deg tp 2458800.552819197846 (2019-Nov-13.05281920) 6.7743e-05 TDB period 1471.811692155578 4.03 7.7431e-06 2.12e-08 d yr n .244596507772508 1.2868e-09 deg/d Q 3.133522912710361 1.099e-08 au   Orbit Determination Parameters    # obs. used (total)      480      data-arc span      9302 days (25.47 yr)      first obs. used      1995-08-27      last obs. used      2021-02-13      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51519      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:02:00   Additional Information  Earth MOID = .925722 au   Jupiter MOID = 2.30336 au   T_jup = 3.408  [ 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 16.5   n/a MPO439950   160597 (1999 RQ159)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 15:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin