+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2009 WP25) Classification: Apollo [NEO]          SPK-ID: 3478248 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .7726793448284419 2.4892e-07   a 1.397992285689693 1.9445e-08 au q .3177925223077651 3.4962e-07 au i 27.53111450566225 4.9553e-05 deg node 245.236025194292 1.5072e-05 deg peri 29.00773899967713 4.274e-05 deg M 291.7278859040551 7.3453e-05 deg tp 2459314.997614849556 (2021-Apr-10.49761485) 0.00012543 TDB period 603.7478389480327 1.65 1.2596e-05 3.449e-08 d yr n .5962754262230773 1.2441e-08 deg/d Q 2.478192049071622 3.447e-08 au   Orbit Determination Parameters    # obs. used (total)      112      data-arc span      3683 days (10.08 yr)      first obs. used      2009-11-21      last obs. used      2019-12-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42189      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 03:12:48   Additional Information  Earth MOID = .202272 au   Jupiter MOID = 2.7504 au   T_jup = 4.306  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 19.7   n/a E2019Y81   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-22 12:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin