+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   190881 (2001 TF168) Classification: Main-belt Asteroid          SPK-ID: 2190881 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1204373982796617 3.5347e-08   a 2.315168806946956 9.4813e-09 au q 2.036335899260036 8.1364e-08 au i 6.494983244144422 4.5538e-06 deg node 292.4020015766848 3.262e-05 deg peri 90.72388345478517 3.784e-05 deg M 172.9665644773309 1.9582e-05 deg tp 2458582.295618018903 (2019-Apr-08.79561802) 6.883e-05 TDB period 1286.685540559274 3.52 7.904e-06 2.164e-08 d yr n .2797886419423983 1.7187e-09 deg/d Q 2.594001714633875 1.0623e-08 au   Orbit Determination Parameters    # obs. used (total)      946      data-arc span      6820 days (18.67 yr)      first obs. used      2001-09-19      last obs. used      2020-05-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49994      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 22:09:30   Additional Information  Earth MOID = 1.05063 au   Jupiter MOID = 2.85555 au   T_jup = 3.563  [ 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 15.76   n/a E2021B55   190881 (2001 TF168)          Discovered 2001-Oct-15 by LINEAR at Socorro Reference: 20080917/Numbers.arc Last Updated: 2008-09-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-17 12:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin