+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74841 (1999 TH36) Classification: Main-belt Asteroid          SPK-ID: 2074841 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0748658021665119 4.6916e-08   a 2.255887330497966 8.1382e-09 au q 2.086998515902965 1.0795e-07 au i 10.38044051799576 5.5208e-06 deg node 304.849821758971 2.1936e-05 deg peri 153.5686000775412 4.1824e-05 deg M 321.6932547699766 3.6023e-05 deg tp 2459132.188329070604 (2020-Oct-09.68832907) 0.00012408 TDB period 1237.583568657276 3.39 6.6969e-06 1.834e-08 d yr n .2908894470783774 1.5741e-09 deg/d Q 2.424776145092967 8.7474e-09 au   Orbit Determination Parameters    # obs. used (total)      1104      data-arc span      7783 days (21.31 yr)      first obs. used      1999-07-23      last obs. used      2020-11-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54452      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:09:28   Additional Information  Earth MOID = 1.10825 au   Jupiter MOID = 2.67673 au   T_jup = 3.598  [ hide covariance matrix ] Orbital Elements at Epoch 2457185.5 (2015-Jun-12.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07446076935884464 4.6616e-08   q 2.087969187539359 1.0718e-07 au tp 2456654.742961879422 (2013-Dec-28.24296188) 0.00012132 TDB node 304.9210272815389 2.1949e-05 deg peri 152.9643614887182 4.2168e-05 deg i 10.37623378149272 5.5198e-06 deg   Orbit Determination Parameters    # obs. used (total)      1104      data-arc span      7783 days (21.31 yr)      first obs. used      1999-07-23      last obs. used      2020-11-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54452      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:09:28   Additional Information  Jupiter MOID = 2.67673 au   T_jup = 3.598  Orbit Covariance (6×6)   e q tp node peri i e 2.173010989368488E-15 -4.98461520784084E-15 1.891754331934806E-12 -8.782933253356023E-15 6.315657328137E-13 -5.905038483109009E-16 q -4.98461520784084E-15 1.148801691367244E-14 -4.031147287231808E-12 1.906992273092806E-14 -1.356421609425821E-12 1.79533027760661E-15 tp 1.891754331934806E-12 -4.031147287231808E-12 1.471931653319082E-8 -3.628137894069685E-11 4.375519199374126E-9 7.208511866838861E-12 node -8.782933253356023E-15 1.906992273092806E-14 -3.628137894069685E-11 4.817482595709081E-10 -4.840762157260488E-10 3.76462227359257E-11 peri 6.315657328137E-13 -1.356421609425821E-12 4.375519199374126E-9 -4.840762157260488E-10 1.778112757867113E-9 -3.500552344133854E-11 i -5.905038483109009E-16 1.79533027760661E-15 7.208511866838861E-12 3.76462227359257E-11 -3.500552344133854E-11 3.046868654422268E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8   n/a MPO341160   74841 (1999 TH36)          Discovered 1999-Oct-11 by LONEOS at Anderson Mesa Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-19 05:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin