+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2017 WJ16) Classification: Aten [NEO]          SPK-ID: 3789720 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2120031724835488 4.1087e-08   a .8241514124013153 3.9953e-09 au q .6494286983654388 3.6656e-08 au i 5.774199994016862 1.1243e-05 deg node 59.19252169244157 4.7757e-06 deg peri 187.053382642462 3.6203e-05 deg M 300.8360816700972 5.3281e-05 deg tp 2459045.412100370295 (2020-Jul-14.91210037) 4.0218e-05 TDB period 273.2806850815722 0.75 1.9872e-06 5.441e-09 d yr n 1.317326908385577 9.5793e-09 deg/d Q .9988741264371918 4.8424e-09 au   Orbit Determination Parameters    # obs. used (total)      126      data-arc span      1100 days (3.01 yr)      first obs. used      2017-11-25      last obs. used      2020-11-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45947      source      ORB      producer      Otto Matic      solution date      2020-Nov-30 05:18:12   Additional Information  Earth MOID = .00852175 au   Jupiter MOID = 4.004 au   T_jup = 7.088  [ 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 24.3   n/a MPO435150   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2020-Dec-01 18:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin