+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102145 (1999 RQ188) Classification: Main-belt Asteroid          SPK-ID: 2102145 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1803390458142892 3.3868e-08   a 2.542193725816916 1.0512e-08 au q 2.08373693502802 8.4341e-08 au i 2.529521044343145 3.389e-06 deg node 54.44821563314555 0.00012277 deg peri 328.2343071075932 0.00012366 deg M 67.27914471207947 1.6485e-05 deg tp 2458923.812619498463 (2020-Mar-15.31261950) 6.7382e-05 TDB period 1480.510155217083 4.05 9.1828e-06 2.514e-08 d yr n .2431594263176225 1.5082e-09 deg/d Q 3.000650516605811 1.2408e-08 au   Orbit Determination Parameters    # obs. used (total)      608      data-arc span      10697 days (29.29 yr)      first obs. used      1991-10-06      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50753      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:30:39   Additional Information  Earth MOID = 1.08628 au   Jupiter MOID = 2.45589 au   T_jup = 3.420  [ 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 16.1   n/a MPO449617   102145 (1999 RQ188)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-04 22:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin