+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70587 (1999 TF170) Classification: Main-belt Asteroid          SPK-ID: 2070587 [ 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 .05085220734325476 4.1235e-08   a 2.686067860600226 1.7717e-08 au q 2.549475380814931 1.12e-07 au i 5.337063008751624 5.4089e-06 deg node 5.480662975267408 4.7651e-05 deg peri 305.3181999496435 7.0746e-05 deg M 314.5926692986695 5.2828e-05 deg tp 2459203.313737850673 (2020-Dec-19.81373785) 0.00023621 TDB period 1607.955026171646 4.40 1.5909e-05 4.356e-08 d yr n .2238868588614187 2.2151e-09 deg/d Q 2.822660340385521 1.8618e-08 au   Orbit Determination Parameters    # obs. used (total)      746      data-arc span      7568 days (20.72 yr)      first obs. used      1999-10-02      last obs. used      2020-06-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5593      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:00:02   Additional Information  Earth MOID = 1.54006 au   Jupiter MOID = 2.31716 au   T_jup = 3.366  [ 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 15.1   n/a MPO385263   diameter diameter 4.444 km 0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.108   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70587 (1999 TF170)          Discovered 1999-Oct-10 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 TF170 = 2001 BS19  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-25 12:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin