+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160431 (2005 ST33) Classification: Main-belt Asteroid          SPK-ID: 2160431 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02423588395111774 5.1175e-08   a 2.412975557673591 1.3117e-08 au q 2.35449496208093 1.237e-07 au i 4.543598680639902 3.6786e-06 deg node 133.3136620775727 7.4854e-05 deg peri 47.9035936173614 0.00012492 deg M 221.192010486643 0.00010083 deg tp 2459728.385550121712 (2022-May-28.88555012) 0.00038547 TDB period 1369.076799614114 3.75 1.1163e-05 3.056e-08 d yr n .2629509170716128 2.1441e-09 deg/d Q 2.471456153266252 1.3435e-08 au   Orbit Determination Parameters    # obs. used (total)      429      data-arc span      7174 days (19.64 yr)      first obs. used      2001-05-23      last obs. used      2021-01-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51443      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 11:01:38   Additional Information  Earth MOID = 1.35907 au   Jupiter MOID = 2.48776 au   T_jup = 3.514  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.6   n/a MPO436809   160431 (2005 ST33)          Discovered 2005-Sep-23 by Spacewatch at Kitt Peak Reference: 20070730/Numbers.arc Last Updated: 2007-08-06 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 10:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin