+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102344 (1999 TA121) Classification: Main-belt Asteroid          SPK-ID: 2102344 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .1874720436082341 6.1488e-08   a 2.397461232049481 1.1833e-08 au q 1.94800427540565 1.4494e-07 au i 2.288218564897981 5.3133e-06 deg node 11.99703945582421 0.00010397 deg peri 33.87756423265847 0.00010447 deg M 180.4554651943145 1.1147e-05 deg tp 2459676.731669534887 (2022-Apr-07.23166953) 4.5062e-05 TDB period 1355.89424259574 3.71 1.0038e-05 2.748e-08 d yr n .2655074331688376 1.9657e-09 deg/d Q 2.846918188693312 1.4052e-08 au   Orbit Determination Parameters    # obs. used (total)      413      data-arc span      7561 days (20.70 yr)      first obs. used      1999-10-04      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57656      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:55:20   Additional Information  Earth MOID = .957902 au   Jupiter MOID = 2.54749 au   T_jup = 3.503  [ 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 16.95   n/a E2021B55   102344 (1999 TA121)          Discovered 1999-Oct-04 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-01 11:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin