+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100621 (1997 TX23) Classification: Main-belt Asteroid          SPK-ID: 2100621 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1339151373116765 5.0998e-08   a 3.071888213410567 1.8407e-08 au q 2.66051588150557 1.5902e-07 au i .6408399126130558 4.3361e-06 deg node 237.4978572674813 0.00048455 deg peri 129.8791664208428 0.00048481 deg M 125.8364558370244 1.6753e-05 deg tp 2458513.098436763955 (2019-Jan-29.59843676) 8.9627e-05 TDB period 1966.556997484711 5.38 1.7676e-05 4.839e-08 d yr n .183061055672656 1.6454e-09 deg/d Q 3.483260545315563 2.0872e-08 au   Orbit Determination Parameters    # obs. used (total)      693      data-arc span      8561 days (23.44 yr)      first obs. used      1997-10-11      last obs. used      2021-03-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56111      source      ORB      producer      Otto Matic      solution date      2021-May-04 08:31:52   Additional Information  Earth MOID = 1.65781 au   Jupiter MOID = 1.98285 au   T_jup = 3.217  [ hide covariance matrix ] Orbital Elements at Epoch 2457183.5 (2015-Jun-10.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .130219622170591 5.0665e-08   q 2.676252198192115 1.5681e-07 au tp 2456534.114413063955 (2013-Aug-29.61441306) 9.0516e-05 TDB node 238.708157895695 0.00049208 deg peri 127.1433263175092 0.00049234 deg i .6334251719301873 4.3048e-06 deg   Orbit Determination Parameters    # obs. used (total)      693      data-arc span      8561 days (23.44 yr)      first obs. used      1997-10-11      last obs. used      2021-03-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56111      source      ORB      producer      Otto Matic      solution date      2021-May-04 08:31:52   Additional Information  Jupiter MOID = 1.98285 au   T_jup = 3.217  Orbit Covariance (6×6)   e q tp node peri i e 2.566968373091068E-15 -7.902574495644567E-15 -7.314016469270386E-13 1.649108222829328E-14 -2.223306070784879E-13 1.742190505948921E-16 q -7.902574495644567E-15 2.458814143310185E-14 2.407601573301178E-12 -3.179029003746348E-14 7.083314884019189E-13 -7.210141340302556E-16 tp -7.314016469270386E-13 2.407601573301178E-12 8.193212637650802E-9 3.911185732413896E-11 1.506965246944302E-9 2.741109823950105E-13 node 1.649108222829328E-14 -3.179029003746348E-14 3.911185732413896E-11 2.421398790025544E-7 -2.421159861889138E-7 -3.545160387333899E-10 peri -2.223306070784879E-13 7.083314884019189E-13 1.506965246944302E-9 -2.421159861889138E-7 2.423974113151499E-7 3.54512604912335E-10 i 1.742190505948921E-16 -7.210141340302556E-16 2.741109823950105E-13 -3.545160387333899E-10 3.54512604912335E-10 1.853147587787276E-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 15.15   n/a MPCxxxxx   100621 (1997 TX23)          Discovered 1997-Oct-11 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1997 TX23 = 1999 CJ136  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-11 12:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin