+ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .133915136927663 5.1308e-08   a 3.071888216736404 1.8928e-08 au q 2.660515885565674 1.6042e-07 au i .640840858914586 4.5807e-06 deg node 237.4978577851195 0.00048459 deg peri 129.8791652419642 0.00048487 deg M 125.8364558600897 1.6989e-05 deg tp 2458513.098435521614 (2019-Jan-29.59843552) 9.1206e-05 TDB period 1966.557000678407 5.38 1.8176e-05 4.976e-08 d yr n .1830610553753642 1.692e-09 deg/d Q 3.483260547907134 2.1463e-08 au   Orbit Determination Parameters    # obs. used (total)      662      data-arc span      8501 days (23.27 yr)      first obs. used      1997-10-11      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56748      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:25:49   Additional Information  Earth MOID = 1.65781 au   Jupiter MOID = 1.98285 au   T_jup = 3.217  [ hide covariance matrix ] Orbital Elements at Epoch 2457044.5 (2015-Jan-22.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1302066834752041 5.0926e-08   q 2.67423344648129 1.5804e-07 au tp 2456532.520861020549 (2013-Aug-28.02086102) 9.3259e-05 TDB node 238.8868084974709 0.00049155 deg peri 126.5947274516945 0.00049185 deg i .6342254175983831 4.549e-06 deg   Orbit Determination Parameters    # obs. used (total)      662      data-arc span      8501 days (23.27 yr)      first obs. used      1997-10-11      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56748      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:25:49   Additional Information  Jupiter MOID = 1.98285 au   T_jup = 3.217  Orbit Covariance (6×6)   e q tp node peri i e 2.593489785569004E-15 -8.004920263363553E-15 -6.157356885090424E-13 1.546788051429491E-14 -1.970191033618525E-13 1.540941186946887E-16 q -8.004920263363553E-15 2.497605039996136E-14 1.991563055380054E-12 -3.407299204929244E-14 6.228527660266552E-13 -4.48913612763644E-16 tp -6.157356885090424E-13 1.991563055380054E-12 8.697288520544143E-9 2.359040403388056E-11 1.632601714460481E-9 4.916864480678159E-13 node 1.546788051429491E-14 -3.407299204929244E-14 2.359040403388056E-11 2.416250481102961E-7 -2.416040823429846E-7 -3.561746249427105E-10 peri -1.970191033618525E-13 6.228527660266552E-13 1.632601714460481E-9 -2.416040823429846E-7 2.419124838233341E-7 3.562136432555551E-10 i 1.540941186946887E-16 -4.48913612763644E-16 4.916864480678159E-13 -3.561746249427105E-10 3.562136432555551E-10 2.069361350860377E-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 15.14   n/a E2021B55   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-Feb-25 06:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin