+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   180285 (2003 WC90) Classification: Main-belt Asteroid          SPK-ID: 2180285 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08784667357015988 3.6956e-08   a 2.298511187050109 1.0839e-08 au q 2.096594625103958 8.9993e-08 au i .9949503484990554 3.4989e-06 deg node 83.59137559662301 0.00028887 deg peri 343.6952234158618 0.00029064 deg M 311.7296707584456 3.2414e-05 deg tp 2459371.165650305675 (2021-Jun-05.66565031) 0.00011517 TDB period 1272.824011673648 3.48 9.0035e-06 2.465e-08 d yr n .2828356447539301 2.0007e-09 deg/d Q 2.500427748996261 1.1791e-08 au   Orbit Determination Parameters    # obs. used (total)      347      data-arc span      8769 days (24.01 yr)      first obs. used      1996-11-07      last obs. used      2020-11-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60015      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 05:11:04   Additional Information  Earth MOID = 1.10983 au   Jupiter MOID = 2.70044 au   T_jup = 3.588  [ 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 17.52   n/a E2021B55   180285 (2003 WC90)          Discovered 2003-Nov-16 by Spacewatch at Kitt Peak Reference: 20080321/Numbers.arc Last Updated: 2008-03-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 23:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin