+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134606 (1999 TH191) Classification: Outer Main-belt Asteroid          SPK-ID: 2134606 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2843384581257085 4.2702e-08   a 3.95660003038653 4.3245e-08 au q 2.831586478326293 1.746e-07 au i 8.94533220490233 6.3384e-06 deg node 327.6995638068805 2.9851e-05 deg peri 41.17952378022193 3.1859e-05 deg M 235.9096717792932 1.1589e-05 deg tp 2459991.370923226913 (2023-Feb-15.87092323) 0.00010378 TDB period 2874.628002653347 7.87 4.7128e-05 1.29e-07 d yr n .1252335953270168 2.0532e-09 deg/d Q 5.081613582446767 5.5541e-08 au   Orbit Determination Parameters    # obs. used (total)      645      data-arc span      10450 days (28.61 yr)      first obs. used      1991-09-14      last obs. used      2020-04-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52474      source      ORB      producer      Otto Matic      solution date      2020-May-20 22:20:44   Additional Information  Earth MOID = 1.83828 au   Jupiter MOID = .61977 au   T_jup = 2.967  [ 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 13.5   n/a MPO439835   134606 (1999 TH191)          Discovered 1999-Oct-12 by LINEAR at Socorro Reference: 20060907/Numbers.arc Last Updated: 2006-09-10 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-01 01:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin