+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70561 (1999 TU143) Classification: Main-belt Asteroid          SPK-ID: 2070561 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09833355102209583 3.5207e-08   a 2.360383070612905 1.012e-08 au q 2.1282782215071 8.1837e-08 au i 3.841317174709657 3.9622e-06 deg node 272.1156810099357 9.1911e-05 deg peri 184.6855835100075 9.8176e-05 deg M 177.5070434921744 3.3408e-05 deg tp 2458347.391624370746 (2018-Aug-16.89162437) 0.00012253 TDB period 1324.561609505355 3.63 8.5184e-06 2.332e-08 d yr n .2717880372015603 1.7479e-09 deg/d Q 2.592487919718711 1.1115e-08 au   Orbit Determination Parameters    # obs. used (total)      667      data-arc span      8701 days (23.82 yr)      first obs. used      1995-07-03      last obs. used      2019-04-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5639      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 16:12:17   Additional Information  Earth MOID = 1.14513 au   Jupiter MOID = 2.5363 au   T_jup = 3.542  [ 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 15.8   n/a MPO266257   diameter diameter 3.466 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.070   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70561 (1999 TU143)          Discovered 1999-Oct-07 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-20 15:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin