+ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07486580714725741 4.7256e-08   a 2.255887328291305 8.707e-09 au q 2.086998502625506 1.0906e-07 au i 10.38044149351567 5.6507e-06 deg node 304.8498258864397 2.2636e-05 deg peri 153.568588413024 4.3695e-05 deg M 321.693263956162 3.8532e-05 deg tp 2459132.188297297737 (2020-Oct-09.68829730) 0.00013279 TDB period 1237.583566841409 3.39 7.165e-06 1.962e-08 d yr n .2908894475051901 1.6841e-09 deg/d Q 2.424776153957104 9.3589e-09 au   Orbit Determination Parameters    # obs. used (total)      1032      data-arc span      7454 days (20.41 yr)      first obs. used      1999-07-23      last obs. used      2019-12-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55133      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 17:22:54   Additional Information  Earth MOID = 1.10825 au   Jupiter MOID = 2.67673 au   T_jup = 3.598  [ hide covariance matrix ] Orbital Elements at Epoch 2457033.5 (2015-Jan-11.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0745602851076608 4.697e-08   q 2.087545438155238 1.0836e-07 au tp 2456654.714591650713 (2013-Dec-28.21459165) 0.00012831 TDB node 304.9209297025957 2.265e-05 deg peri 152.9326766864005 4.3992e-05 deg i 10.37630162026442 5.6499e-06 deg   Orbit Determination Parameters    # obs. used (total)      1032      data-arc span      7454 days (20.41 yr)      first obs. used      1999-07-23      last obs. used      2019-12-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55133      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 17:22:54   Additional Information  Jupiter MOID = 2.67673 au   T_jup = 3.598  Orbit Covariance (6×6)   e q tp node peri i e 2.206210045443502E-15 -5.076620654378732E-15 1.656927231794949E-12 -6.133033328650194E-15 5.64810520976182E-13 -3.896808427169984E-16 q -5.076620654378732E-15 1.174253243085259E-14 -3.382135671346588E-12 1.316557167938961E-14 -1.173409122341105E-12 1.540027463396962E-15 tp 1.656927231794949E-12 -3.382135671346588E-12 1.646371082180757E-8 -3.045317434832768E-11 4.846707593541434E-9 1.116186066629043E-11 node -6.133033328650194E-15 1.316557167938961E-14 -3.045317434832768E-11 5.130131580856772E-10 -5.13072824755567E-10 4.433118838287396E-11 peri 5.64810520976182E-13 -1.173409122341105E-12 4.846707593541434E-9 -5.13072824755567E-10 1.935299579862295E-9 -4.046555070721458E-11 i -3.896808427169984E-16 1.540027463396962E-15 1.116186066629043E-11 4.433118838287396E-11 -4.046555070721458E-11 3.1920922860531E-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 ] 2020-Sep-27 03:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin