+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146779 (2001 XK234) Classification: Main-belt Asteroid          SPK-ID: 2146779 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1673007895851355 5.3349e-08   a 2.764622499691663 1.6674e-08 au q 2.302098972588416 1.4535e-07 au i 7.754029783446531 4.3651e-06 deg node 283.7559065893483 3.7323e-05 deg peri 66.45367878791313 4.0283e-05 deg M 75.98983680500571 1.3014e-05 deg tp 2458646.090630169783 (2019-Jun-11.59063017) 6.0318e-05 TDB period 1679.005752654457 4.60 1.5189e-05 4.159e-08 d yr n .2144126066458385 1.9397e-09 deg/d Q 3.227146026794909 1.9463e-08 au   Orbit Determination Parameters    # obs. used (total)      659      data-arc span      7437 days (20.36 yr)      first obs. used      2000-07-07      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50025      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 23:07:10   Additional Information  Earth MOID = 1.30884 au   Jupiter MOID = 2.24207 au   T_jup = 3.306  [ hide covariance matrix ] Orbital Elements at Epoch 2457136.5 (2015-Apr-24.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1697099226907178 5.4043e-08   q 2.293836692196244 1.4778e-07 au tp 2456963.919278923204 (2014-Nov-02.41927892) 5.8309e-05 TDB node 284.037062154539 3.7374e-05 deg peri 65.50543156945371 4.0136e-05 deg i 7.75057240268355 4.3663e-06 deg   Orbit Determination Parameters    # obs. used (total)      659      data-arc span      7437 days (20.36 yr)      first obs. used      2000-07-07      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50025      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 23:07:10   Additional Information  Jupiter MOID = 2.24207 au   T_jup = 3.306  Orbit Covariance (6×6)   e q tp node peri i e 2.920664590759544E-15 -7.953308249489255E-15 -5.842660703125122E-13 -7.801608111342229E-15 -2.449283061609744E-13 -6.731427277218713E-15 q -7.953308249489255E-15 2.184018237480604E-14 1.508771265206347E-12 2.323169990320688E-14 6.510702914501613E-13 1.919349621462552E-14 tp -5.842660703125122E-13 1.508771265206347E-12 3.399956812036993E-9 -3.074470680232478E-11 8.768001595006019E-10 -1.59895932895517E-12 node -7.801608111342229E-15 2.323169990320688E-14 -3.074470680232478E-11 1.396846024475579E-9 -1.390811122540242E-9 2.20345807154368E-11 peri -2.449283061609744E-13 6.510702914501613E-13 8.768001595006019E-10 -1.390811122540242E-9 1.6108720666888E-9 -2.206217705144729E-11 i -6.731427277218713E-15 1.919349621462552E-14 -1.59895932895517E-12 2.20345807154368E-11 -2.206217705144729E-11 1.906430983834041E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.4   n/a MPO502888   146779 (2001 XK234)          Discovered 2001-Dec-15 by LINEAR at Socorro Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 Alternate Designations  2001 XK234 = 2000 NX21 = 2001 YC111  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-20 21:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin