+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102470 (1999 TQ239) Classification: Main-belt Asteroid          SPK-ID: 2102470 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08871461639955718 3.9128e-08   a 2.354428187820186 1.228e-08 au q 2.145555994297414 9.489e-08 au i 5.787833067422464 4.3689e-06 deg node 95.55689227098117 4.4749e-05 deg peri 310.6640149701208 5.2909e-05 deg M 293.3636972184125 2.8363e-05 deg tp 2459444.750235925565 (2021-Aug-18.25023593) 0.00010453 TDB period 1319.552275002562 3.61 1.0324e-05 2.827e-08 d yr n .2728198092790989 2.1344e-09 deg/d Q 2.563300381342958 1.3369e-08 au   Orbit Determination Parameters    # obs. used (total)      546      data-arc span      8571 days (23.47 yr)      first obs. used      1997-01-10      last obs. used      2020-06-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56789      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:54:35   Additional Information  Earth MOID = 1.15987 au   Jupiter MOID = 2.72351 au   T_jup = 3.543  [ 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 16.56   n/a E2021B55   102470 (1999 TQ239)          Discovered 1999-Oct-04 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-03 19:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin