+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109877 (2001 RZ154) Classification: Main-belt Asteroid          SPK-ID: 2109877 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1073274487800799 1.0409e-07   a 2.542713872340625 1.7892e-08 au q 2.269810879444587 2.7179e-07 au i 5.723868142797041 4.806e-06 deg node 63.65885428747431 8.2081e-05 deg peri 277.1723745801785 8.4673e-05 deg M 229.3131246408304 2.2718e-05 deg tp 2459538.118418697267 (2021-Nov-19.61841870) 9.5388e-05 TDB period 1480.964558981908 4.05 1.5632e-05 4.28e-08 d yr n .24308481780785 2.5658e-09 deg/d Q 2.815616865236662 1.9813e-08 au   Orbit Determination Parameters    # obs. used (total)      270      data-arc span      6800 days (18.62 yr)      first obs. used      2001-09-12      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56949      source      ORB      producer      Otto Matic      solution date      2020-May-20 19:09:51   Additional Information  Earth MOID = 1.27021 au   Jupiter MOID = 2.5352 au   T_jup = 3.429  [ 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 16.3   n/a MPO417564   109877 (2001 RZ154)          Discovered 2001-Sep-12 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-13 03:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin