+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (1999 YD) Classification: Apollo [NEO, PHA]          SPK-ID: 3025760 [ 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 .5936598433134643 6.7891e-05   a 2.461490731248971 0.00031196 au q 1.000202529418162 4.0354e-05 au i 1.377006764418076 9.932e-05 deg node 9.399776589717211 0.0021567 deg peri 61.85338830521253 0.0020683 deg M 107.8696114725389 0.37772 deg tp 2458577.838833074095 (2019-Apr-04.33883307) 1.3996 TDB period 1410.57354352353 3.86 0.26816 0.0007342 d yr n .2552153353881436 4.8518e-05 deg/d Q 3.922778933079779 0.00049716 au   Orbit Determination Parameters    # obs. used (total)      99      data-arc span      71 days      first obs. used      1999-12-17      last obs. used      2000-02-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      6      norm. resid. RMS      .45857      source      ORB      producer      Otto Matic      solution date      2017-Apr-06 09:17:12   Additional Information  Earth MOID = .0253248 au   Jupiter MOID = 1.41084 au   T_jup = 3.221  [ 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 21.1   n/a MPO02706   SMASSII spectral type spec_B Sk   n/a Binzel et al. (2001) Icarus 151, 139-149   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-18 18:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin