+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146163 (2000 ST204) Classification: Main-belt Asteroid          SPK-ID: 2146163 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1533721230815832 5.0394e-08   a 3.111583011385492 2.8253e-08 au q 2.634352918784713 1.5562e-07 au i 2.661581929052232 6.7453e-06 deg node 43.528663544163 0.00011545 deg peri 39.88995963477085 0.00011803 deg M 159.9601439648829 2.8158e-05 deg tp 2458109.700837759446 (2017-Dec-22.20083776) 0.00014873 TDB period 2004.797510541139 5.49 2.7305e-05 7.476e-08 d yr n .1795692572976251 2.4457e-09 deg/d Q 3.588813103986271 3.2586e-08 au   Orbit Determination Parameters    # obs. used (total)      457      data-arc span      7240 days (19.82 yr)      first obs. used      2000-09-24      last obs. used      2020-07-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57255      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 14:30:19   Additional Information  Earth MOID = 1.65107 au   Jupiter MOID = 1.64816 au   T_jup = 3.199  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.2   n/a MPO297016   diameter diameter 5.692 km 1.715 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   146163 (2000 ST204)          Discovered 2000-Sep-24 by LINEAR at Socorro Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 [ show close-approach data ] Alternate Designations  2000 ST204 = 2002 AX112  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-25 17:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin