+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2015 TT238) Classification: Aten [NEO]          SPK-ID: 3730802 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2502367639097868 1.2329e-06   a .8854839799835719 1.0345e-08 au q .6639033343385243 1.0944e-06 au i 10.80428854428095 0.00014618 deg node 4.483036774627316 0.00034276 deg peri 216.0582215232021 0.00032613 deg M 225.5598752862303 0.0010765 deg tp 2459314.156923277823 (2021-Apr-09.65692328) 0.00090819 TDB period 304.3473253772252 0.83 5.3334e-06 1.46e-08 d yr n 1.182859088884043 2.0728e-08 deg/d Q 1.107064625628619 1.2934e-08 au   Orbit Determination Parameters    # obs. used (total)      36      data-arc span      1827 days (5.00 yr)      first obs. used      2015-10-12      last obs. used      2020-10-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      1      norm. resid. RMS      .50391      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 14:54:37   Additional Information  Earth MOID = .0245532 au   Jupiter MOID = 3.86845 au   T_jup = 6.661  [ 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 24.6   n/a E2020V08   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-22 10:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin