+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146428 (2001 QC258) Classification: Main-belt Asteroid          SPK-ID: 2146428 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1786549634338006 8.212e-08   a 2.546861600488192 2.0915e-08 au q 2.091852134382024 2.1313e-07 au i 7.642380158556881 5.4005e-06 deg node 89.05139872877812 5.9368e-05 deg peri 252.3347619182601 6.2468e-05 deg M 216.5146228885101 2.7256e-05 deg tp 2459592.213649887079 (2022-Jan-12.71364989) 0.00011838 TDB period 1484.589706962484 4.06 1.8287e-05 5.007e-08 d yr n .2424912407190071 2.987e-09 deg/d Q 3.001871066594361 2.4651e-08 au   Orbit Determination Parameters    # obs. used (total)      270      data-arc span      7291 days (19.96 yr)      first obs. used      2000-05-05      last obs. used      2020-04-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57193      source      ORB      producer      Otto Matic      solution date      2020-May-20 23:54:29   Additional Information  Earth MOID = 1.09841 au   Jupiter MOID = 2.41752 au   T_jup = 3.408  [ 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 15.9   n/a MPO417787   146428 (2001 QC258)          Discovered 2001-Aug-25 by LONEOS at Anderson Mesa Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-23 03:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin