+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (1998 SU4) Classification: Apollo [NEO, PHA]          SPK-ID: 3014110 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5803782328702249 4.0731e-06   a 1.147965774225984 1.1037e-08 au q .4817114267852077 4.6713e-06 au i 23.15224273049208 0.00031314 deg node 350.6078397151138 4.9539e-05 deg peri 241.8251927359873 0.00044322 deg M 283.0268305290336 0.000124 deg tp 2459096.556930754095 (2020-Sep-04.05693075) 0.00015482 TDB period 449.2538803994273 1.23 6.4792e-06 1.774e-08 d yr n .801328637784781 1.1557e-08 deg/d Q 1.81422012166676 1.7443e-08 au   Orbit Determination Parameters    # obs. used (total)      97      data-arc span      5855 days (16.03 yr)      first obs. used      1998-09-19      last obs. used      2014-09-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50628      source      ORB      producer      Otto Matic      solution date      2017-Apr-06 09:17:43   Additional Information  Earth MOID = .0204542 au   Jupiter MOID = 3.35044 au   T_jup = 5.236  [ 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 21.3   n/a MPO308282   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-18 18:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin