+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   392756 (2012 TX21) Classification: Main-belt Asteroid          SPK-ID: 2392756 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1460320498387478 9.7769e-08   a 2.555254627294521 1.8675e-08 au q 2.182105556210757 2.5867e-07 au i 1.786298777288211 7.4954e-06 deg node 15.56816138393902 0.00012486 deg peri 358.9953699609757 0.00012626 deg M 318.4589384279789 1.4656e-05 deg tp 2459172.657041944584 (2020-Nov-19.15704194) 6.0715e-05 TDB period 1491.934311611159 4.08 1.6355e-05 4.478e-08 d yr n .2412974868921885 2.6452e-09 deg/d Q 2.928403698378285 2.1402e-08 au   Orbit Determination Parameters    # obs. used (total)      260      data-arc span      6785 days (18.58 yr)      first obs. used      2002-03-12      last obs. used      2020-10-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53516      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 16:22:43   Additional Information  Earth MOID = 1.18293 au   Jupiter MOID = 2.53599 au   T_jup = 3.422  [ hide covariance matrix ] Orbital Elements at Epoch 2457792.5 (2017-Feb-08.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1479503572567853 9.8085e-08   q 2.176514541874783 2.6007e-07 au tp 2457681.547973235588 (2016-Oct-20.04797324) 6.1513e-05 TDB node 15.69397298822327 0.00012462 deg peri 359.0376985865349 0.00012597 deg i 1.788893911578118 7.5023e-06 deg   Orbit Determination Parameters    # obs. used (total)      260      data-arc span      6785 days (18.58 yr)      first obs. used      2002-03-12      last obs. used      2020-10-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53516      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 16:22:43   Additional Information  Jupiter MOID = 2.53599 au   T_jup = 3.422  Orbit Covariance (6×6)   e q tp node peri i e 9.620579069103841E-15 -2.547538877640794E-14 1.484060395896193E-12 -8.128664829215208E-14 7.029053811223386E-13 -2.744261975380805E-15 q -2.547538877640794E-14 6.76375442025451E-14 -4.060093637104652E-12 2.146583199997684E-13 -1.891570603898607E-12 7.338250182826812E-15 tp 1.484060395896193E-12 -4.060093637104652E-12 3.783802960024558E-9 -1.276024962542395E-11 1.127125323173839E-9 4.057542935847274E-13 node -8.128664829215208E-14 2.146583199997684E-13 -1.276024962542395E-11 1.553042276909105E-8 -1.552717502652097E-8 -1.196937443934223E-10 peri 7.029053811223386E-13 -1.891570603898607E-12 1.127125323173839E-9 -1.552717502652097E-8 1.586846403792069E-8 1.197092983422315E-10 i -2.744261975380805E-15 7.338250182826812E-15 4.057542935847274E-13 -1.196937443934223E-10 1.197092983422315E-10 5.628480100835872E-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 17.2   n/a MPO437608   392756 (2012 TX21)          Discovered 2004-Oct-10 by Spacewatch at Kitt Peak Reference: Last Updated: 2014-04-17 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 16:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin