+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   390185 (2012 WF16) Classification: Main-belt Asteroid          SPK-ID: 2390185 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2307254685144046 9.4484e-08   a 2.569394594021822 2.2373e-08 au q 1.976569822517759 2.5649e-07 au i 6.228280471028322 5.1095e-06 deg node 164.0598004896395 3.9201e-05 deg peri 216.0230806561431 4.1508e-05 deg M 9.950087727290931 8.2583e-06 deg tp 2459158.921478223881 (2020-Nov-05.42147822) 3.4717e-05 TDB period 1504.335263130209 4.12 1.9648e-05 5.379e-08 d yr n .2393083568691428 3.1256e-09 deg/d Q 3.162219365525885 2.7534e-08 au   Orbit Determination Parameters    # obs. used (total)      397      data-arc span      4405 days (12.06 yr)      first obs. used      2008-12-21      last obs. used      2021-01-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50647      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 16:52:51   Additional Information  Earth MOID = .981157 au   Jupiter MOID = 2.30613 au   T_jup = 3.385  [ 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 16.77   n/a E2020R02   390185 (2012 WF16)          Discovered 2008-Dec-21 by CSS at Catalina Reference: Last Updated: 2014-03-21 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 20:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin