+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2009 BH2) Classification: Aten [NEO]          SPK-ID: 3444370 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4757903722604769 3.4054e-06   a .8142082937314054 1.5449e-08 au q .4268158265593723 2.7647e-06 au i 23.19182421056118 0.00026153 deg node 117.0990421576843 2.3796e-05 deg peri 220.9899917045341 2.0321e-05 deg M 78.86113268513016 0.00047323 deg tp 2459337.715582442167 (2021-May-03.21558244) 0.00035108 TDB period 268.3500680280017 0.73 7.6377e-06 2.091e-08 d yr n 1.341531241804772 3.8182e-08 deg/d Q 1.201600760903438 2.28e-08 au   Orbit Determination Parameters    # obs. used (total)      162      data-arc span      4027 days (11.03 yr)      first obs. used      2009-01-17      last obs. used      2020-01-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      1      norm. resid. RMS      .38193      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 02:29:54   Additional Information  Earth MOID = .000293302 au   Jupiter MOID = 4.19455 au   T_jup = 7.030  [ 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 22.5   n/a MPO535968   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jul-31 10:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin