+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1523805065045136 5.0472e-08   a 3.114253759817724 2.8193e-08 au q 2.639702194513114 1.5625e-07 au i 2.659833446987157 6.7404e-06 deg node 43.49707842668577 0.00011555 deg peri 39.90935529195431 0.00011816 deg M 195.8700846772699 2.8677e-05 deg tp 2460115.697168293161 (2023-Jun-20.19716829) 0.00016901 TDB period 2007.379215042524 5.50 2.7259e-05 7.463e-08 d yr n .1793383120151385 2.4353e-09 deg/d Q 3.588805325122335 3.2489e-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.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .57252      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 18:59:58   Additional Information  Earth MOID = 1.65606 au   Jupiter MOID = 1.64796 au   T_jup = 3.198  [ 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 15.18   n/a E2021B55   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 ] 2021-Apr-20 11:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin