+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2017 QW17) Classification: Aten [NEO, PHA]          SPK-ID: 3781023 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6451138797113471 1.0512e-06   a .8880047557698808 3.3482e-07 au q .3151405625730457 1.048e-06 au i 12.33920803977034 3.2689e-05 deg node 337.0888342718727 1.7083e-05 deg peri 208.6852969737508 7.4575e-05 deg M 78.45856500467359 0.00082448 deg tp 2459133.886964536225 (2020-Oct-11.38696454) 0.0006624 TDB period 305.6478635000598 0.84 0.00017287 4.733e-07 d yr n 1.177825998446508 6.6615e-07 deg/d Q 1.460868948966716 5.5082e-07 au   Orbit Determination Parameters    # obs. used (total)      89      data-arc span      436 days (1.19 yr)      first obs. used      2017-08-20      last obs. used      2018-10-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      3      norm. resid. RMS      .43254      source      ORB      producer      Otto Matic      solution date      2018-Nov-02 06:37:36   Additional Information  Earth MOID = .044226 au   Jupiter MOID = 3.51078 au   T_jup = 6.476  [ 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 21.6   n/a MPO435134   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-04 20:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin