+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2021 AS2) Classification: Apollo [NEO]          SPK-ID: 54104849 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459222.5 (2021-Jan-08.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .776812146880596 0.0060316   a 2.267617091097387 0.050561 au q .5061045902588939 0.0023931 au i .8266260782249234 0.0049775 deg node 108.640526942725 0.00033284 deg peri 96.78024829395528 0.039115 deg M 346.8667975649304 0.49719 deg tp 2459268.001021538155 (2021-Feb-22.50102154) 0.20073 TDB period 1247.248554548679 3.41 41.715 0.1142 d yr n .2886353314959481 0.0096536 deg/d Q 4.02912959193588 0.089838 au   Orbit Determination Parameters    # obs. used (total)      15      first obs. used      2021-01-08      last obs. used      2021-01-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      9      norm. resid. RMS      .29799      source      ORB      producer      Otto Matic      solution date      2021-Jan-08 13:12:03   Additional Information  Earth MOID = .000156885 au   Jupiter MOID = .930421 au   T_jup = 3.126  [ 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 29.507   .41304 1 autocmod 2.8 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-28 05:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin