+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102551 (1999 UC18) Classification: Main-belt Asteroid          SPK-ID: 2102551 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1002077273872682 4.4651e-08   a 2.521544447027949 1.2197e-08 au q 2.268866208485293 1.1414e-07 au i 10.3612604018303 9.8545e-06 deg node 33.4464134916343 2.8196e-05 deg peri 50.57027080161288 0.00025421 deg M 47.31023811265391 0.00023638 deg tp 2459008.301054000890 (2020-Jun-07.80105400) 0.00095999 TDB period 1462.508398180585 4.00 1.0611e-05 2.905e-08 d yr n .2461524326614831 1.786e-09 deg/d Q 2.774222685570606 1.3419e-08 au   Orbit Determination Parameters    # obs. used (total)      571      data-arc span      9209 days (25.21 yr)      first obs. used      1995-10-26      last obs. used      2021-01-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .565      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:31:46   Additional Information  Earth MOID = 1.29844 au   Jupiter MOID = 2.46538 au   T_jup = 3.426  [ 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 MPO351576   102551 (1999 UC18)          Discovered 1999-Oct-30 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Feb-28 19:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin