+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102403 (1999 TB172) Classification: Main-belt Asteroid          SPK-ID: 2102403 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2039396740731584 5.4821e-08   a 2.415538569150776 1.1293e-08 au q 1.922914420647024 1.3228e-07 au i 1.810849654052804 3.9123e-06 deg node 91.67153495452534 0.00019093 deg peri 319.7756531201495 0.00019121 deg M 216.2702376643426 1.1739e-05 deg tp 2459747.974124818170 (2022-Jun-17.47412482) 4.667e-05 TDB period 1371.258685269847 3.75 9.6164e-06 2.633e-08 d yr n .2625325213011551 1.8411e-09 deg/d Q 2.908162717654529 1.3596e-08 au   Orbit Determination Parameters    # obs. used (total)      544      data-arc span      7532 days (20.62 yr)      first obs. used      1999-10-10      last obs. used      2020-05-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58049      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:54:59   Additional Information  Earth MOID = .933357 au   Jupiter MOID = 2.46426 au   T_jup = 3.487  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.44   n/a E2021B55   102403 (1999 TB172)          Discovered 1999-Oct-10 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 10:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin