+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74966 (1999 TB208) Classification: Main-belt Asteroid          SPK-ID: 2074966 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1376407566131184 6.7069e-08   a 2.339699775736965 1.5341e-08 au q 2.017661728356986 1.6035e-07 au i 25.82341330352945 6.8923e-06 deg node 343.4908267765846 1.0511e-05 deg peri 171.8617786309931 2.1633e-05 deg M 160.9417528024391 1.8156e-05 deg tp 2458416.107204637550 (2018-Oct-24.60720464) 6.4095e-05 TDB period 1307.189729620576 3.58 1.2856e-05 3.52e-08 d yr n .2753999605738131 2.7086e-09 deg/d Q 2.661737823116944 1.7452e-08 au   Orbit Determination Parameters    # obs. used (total)      902      data-arc span      7200 days (19.71 yr)      first obs. used      1999-10-14      last obs. used      2019-07-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51679      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 17:25:01   Additional Information  Earth MOID = 1.02793 au   Jupiter MOID = 2.32696 au   T_jup = 3.420  [ 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 15.1   n/a MPO337823   diameter diameter 5.275 km 1.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.067   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   74966 (1999 TB208)          Discovered 1999-Oct-14 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 TB208 = 2002 PW77  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-05 11:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin