+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249635 (1999 TQ120) Classification: Main-belt Asteroid          SPK-ID: 2249635 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2775972969328397 4.8584e-08   a 2.38650112249266 1.1548e-08 au q 1.72401486176151 1.1856e-07 au i 1.942000490985131 4.8825e-06 deg node 269.9537314739381 0.00016862 deg peri 58.76632186816411 0.00016888 deg M 349.7901555519177 1.1366e-05 deg tp 2459434.690690973496 (2021-Aug-08.19069097) 4.2684e-05 TDB period 1346.607073239088 3.69 9.7742e-06 2.676e-08 d yr n .2673385630851225 1.9405e-09 deg/d Q 3.04898738322381 1.4754e-08 au   Orbit Determination Parameters    # obs. used (total)      261      data-arc span      7963 days (21.80 yr)      first obs. used      1999-09-18      last obs. used      2021-07-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .59295      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 15:47:48   Additional Information  Earth MOID = .713066 au   Jupiter MOID = 2.31948 au   T_jup = 3.481  [ 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 17.15   n/a E2021B55   249635 (1999 TQ120)          Discovered 1999-Oct-04 by LINEAR at Socorro Reference: 20100923/Numbers.arc Last Updated: 2010-09-27 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 07:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin