+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2015 XA378) Classification: Apollo [NEO]          SPK-ID: 3736778 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6393008601403314 1.2694e-05   a 1.831181480179987 5.1745e-05 au q .660505584827876 4.6879e-06 au i .2259980323529193 2.0307e-05 deg node 74.64197229115132 0.00049773 deg peri 91.96304143266505 0.00052006 deg M 267.6827318848413 0.026532 deg tp 2459232.600433408492 (2021-Jan-18.10043341) 0.076543 TDB period 905.0977973354574 2.48 0.038364 0.000105 d yr n .3977470733657888 1.6859e-05 deg/d Q 3.001857375532098 8.4826e-05 au   Orbit Determination Parameters    # obs. used (total)      49      # delay obs. used      0      # Doppler obs. used      1      data-arc span      12 days      first obs. used      2015-12-06      last obs. used      2015-12-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      5      norm. resid. RMS      .44242      source      ORB      producer      Otto Matic      solution date      2020-Sep-11 07:35:41   Additional Information  Earth MOID = .000245347 au   Jupiter MOID = 1.97617 au   T_jup = 3.754  [ 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 25.9   n/a MPO369302   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-26 23:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin