+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2845144280337947 4.1207e-08   a 3.956753101414667 4.2809e-08 au q 2.830999755894729 1.6981e-07 au i 8.945344683524382 5.5444e-06 deg node 327.6995607275763 2.9649e-05 deg peri 41.15692605214793 3.1169e-05 deg M 261.0061148278931 1.1432e-05 deg tp 2459991.019746003250 (2023-Feb-15.51974600) 0.00010101 TDB period 2874.794822593313 7.87 4.6655e-05 1.277e-07 d yr n .1252263282133119 2.0323e-09 deg/d Q 5.082506446934604 5.4989e-08 au   Orbit Determination Parameters    # obs. used (total)      672      data-arc span      10503 days (28.76 yr)      first obs. used      1991-09-14      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51941      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 16:07:47   Additional Information  Earth MOID = 1.83617 au   Jupiter MOID = .619614 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 ] 2021-Apr-10 12:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin