+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70658 (1999 TZ260) Classification: Main-belt Asteroid          SPK-ID: 2070658 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2243760083637133 3.8682e-08   a 2.365534848976979 1.2351e-08 au q 1.834765581918265 9.1426e-08 au i 2.687399956998379 5.1423e-06 deg node 159.5262778553177 8.284e-05 deg peri 151.9306831173691 8.3819e-05 deg M 261.5584013828273 1.7661e-05 deg tp 2459363.886349779160 (2021-May-29.38634978) 6.7467e-05 TDB period 1328.900462387217 3.64 1.0408e-05 2.85e-08 d yr n .2709006507178884 2.1217e-09 deg/d Q 2.896304116035693 1.5122e-08 au   Orbit Determination Parameters    # obs. used (total)      720      data-arc span      7589 days (20.78 yr)      first obs. used      1999-07-13      last obs. used      2020-04-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58022      source      ORB      producer      Otto Matic      solution date      2020-May-20 13:40:21   Additional Information  Earth MOID = .821081 au   Jupiter MOID = 2.38745 au   T_jup = 3.512  [ 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 15.9   n/a MPO267921   diameter diameter 1.473 km 0.309 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.427   0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70658 (1999 TZ260)          Discovered 1999-Oct-13 by Spacewatch at Kitt Peak Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 TZ260 = 2000 YY20  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-29 23:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin