+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102459 (1999 TD226) Classification: Main-belt Asteroid          SPK-ID: 2102459 [ 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 .1986205808676891 3.7869e-08   a 2.271655067472874 8.6234e-09 au q 1.820457618440382 8.5839e-08 au i .44287462763733 4.5069e-06 deg node 325.3941233024889 0.00059468 deg peri 318.439517209913 0.00059479 deg M 155.2133602470964 1.2549e-05 deg tp 2458661.313997578791 (2019-Jun-26.81399758) 4.2432e-05 TDB period 1250.58152573091 3.42 7.1209e-06 1.95e-08 d yr n .2878660787745091 1.6391e-09 deg/d Q 2.722852516505366 1.0336e-08 au   Orbit Determination Parameters    # obs. used (total)      566      data-arc span      10903 days (29.85 yr)      first obs. used      1991-03-14      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54838      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:33:20   Additional Information  Earth MOID = .802117 au   Jupiter MOID = 2.42766 au   T_jup = 3.586  [ 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 16.6   n/a MPO337999   102459 (1999 TD226)          Discovered 1999-Oct-02 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-05 02:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin