+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70617 (1999 TN209) Classification: Main-belt Asteroid          SPK-ID: 2070617 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09279664649400489 5.6299e-08   a 2.792444118272354 2.0215e-08 au q 2.533314668574771 1.5311e-07 au i 13.71855697114348 5.3694e-06 deg node 301.0755011869594 2.8783e-05 deg peri 197.6533198804099 4.5408e-05 deg M 112.6124146184549 3.5073e-05 deg tp 2458667.338313483267 (2019-Jul-02.83831348) 0.00016464 TDB period 1704.414276137624 4.67 1.8508e-05 5.067e-08 d yr n .2112162547803793 2.2935e-09 deg/d Q 3.051573567969937 2.2091e-08 au   Orbit Determination Parameters    # obs. used (total)      757      data-arc span      9830 days (26.91 yr)      first obs. used      1993-07-19      last obs. used      2020-06-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49767      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 12:50:48   Additional Information  Earth MOID = 1.55053 au   Jupiter MOID = 2.02705 au   T_jup = 3.281  [ 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 14.44   n/a E2021B10   diameter diameter 6.095 km 0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.109   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70617 (1999 TN209)          Discovered 1999-Oct-14 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 02:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin