+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160164 (2001 TW252) Classification: Jupiter Trojan          SPK-ID: 2160164 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03805122250701057 5.6391e-08   a 5.188857352772994 1.3878e-07 au q 4.99141498708549 2.3726e-07 au i 9.830824143056379 8.6186e-06 deg node 45.87684078250835 3.0553e-05 deg peri 74.9610595996789 0.00012368 deg M 124.4423426360552 0.00011838 deg tp 2457708.146523253594 (2016-Nov-15.64652325) 0.0014182 TDB period 4317.238331007176 11.82 0.0001732 4.742e-07 d yr n .0833866403470051 3.3453e-09 deg/d Q 5.386299718460497 1.4406e-07 au   Orbit Determination Parameters    # obs. used (total)      346      data-arc span      9210 days (25.22 yr)      first obs. used      1995-04-05      last obs. used      2020-06-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50935      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 12:30:16   Additional Information  Earth MOID = 4.024 au   Jupiter MOID = .163904 au   T_jup = 2.969  [ 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 13.20   n/a E2021B55   160164 (2001 TW252)          Discovered 2001-Oct-14 by Sloan Digital Sky Survey at Apache Point Reference: 20070730/Numbers.arc Last Updated: 2007-08-06 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 11:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin