+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   187819 (1999 TD244) Classification: Main-belt Asteroid          SPK-ID: 2187819 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1510688943632842 4.8474e-08   a 2.170393587891851 9.3566e-09 au q 1.842514628235867 1.0795e-07 au i 2.713848540939999 5.2549e-06 deg node 194.7187588889155 7.8164e-05 deg peri 175.3117786351792 8.1156e-05 deg M 224.5455096343622 1.8394e-05 deg tp 2459639.937463569265 (2022-Mar-01.43746357) 6.0372e-05 TDB period 1167.901384870346 3.20 7.5523e-06 2.068e-08 d yr n .3082452034595071 1.9933e-09 deg/d Q 2.498272547547834 1.077e-08 au   Orbit Determination Parameters    # obs. used (total)      259      data-arc span      7495 days (20.52 yr)      first obs. used      1999-09-14      last obs. used      2020-03-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56198      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:56:57   Additional Information  Earth MOID = .840495 au   Jupiter MOID = 2.96687 au   T_jup = 3.673  [ 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 18.18   n/a E2021B55   187819 (1999 TD244)          Discovered 1999-Oct-07 by CSS at Catalina Reference: 20080618/Numbers.arc Last Updated: 2008-06-20 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 21:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin