+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146559 (2001 SH345) Classification: Main-belt Asteroid          SPK-ID: 2146559 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1993522064846787 3.9483e-08   a 2.711453453881468 1.8297e-08 au q 2.170919225069694 1.0704e-07 au i 15.42473553569432 4.977e-06 deg node 75.75018921539541 1.6949e-05 deg peri 233.2231054976248 2.1134e-05 deg M 117.0873575419352 1.2921e-05 deg tp 2458470.093104745356 (2018-Dec-17.59310475) 5.629e-05 TDB period 1630.803583753984 4.46 1.6507e-05 4.519e-08 d yr n .2207500667684994 2.2345e-09 deg/d Q 3.251987682693242 2.1945e-08 au   Orbit Determination Parameters    # obs. used (total)      380      data-arc span      7484 days (20.49 yr)      first obs. used      2000-04-28      last obs. used      2020-10-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51671      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 14:26:51   Additional Information  Earth MOID = 1.19199 au   Jupiter MOID = 2.06857 au   T_jup = 3.283  [ 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 15.6   n/a MPO439880   146559 (2001 SH345)          Discovered 2001-Sep-23 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 ] 2020-Dec-02 14:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin