+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70521 (1999 TF109) Classification: Main-belt Asteroid          SPK-ID: 2070521 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09951932558234575 4.1113e-08   a 2.378087272564129 1.0425e-08 au q 2.141421631022587 1.0242e-07 au i 9.063065894450679 4.1136e-06 deg node 226.2130364844075 2.3971e-05 deg peri 44.77741816924658 3.3644e-05 deg M 300.9095277258049 2.6374e-05 deg tp 2459220.364478503891 (2021-Jan-05.86447850) 9.8825e-05 TDB period 1339.49195555789 3.67 8.808e-06 2.411e-08 d yr n .2687586129250492 1.7672e-09 deg/d Q 2.614752914105671 1.1462e-08 au   Orbit Determination Parameters    # obs. used (total)      854      data-arc span      10580 days (28.97 yr)      first obs. used      1991-06-06      last obs. used      2020-05-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52273      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:00:18   Additional Information  Earth MOID = 1.13611 au   Jupiter MOID = 2.45195 au   T_jup = 3.517  [ 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 15.7   n/a MPO468645   diameter diameter 2.766 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.146   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   70521 (1999 TF109)          Discovered 1999-Oct-04 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2157-May-17 05:39 < 00:01 Eunom 0.0395425029793891 0.0395320338822988 0.0395529843404224 6.02277923965414 6.02277918071106 2509024.735393336 0.672609189111447 1219.47753618758 46.981170930782 -64.7420425791885 113838.425587353 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 22:00:20 2020-Nov-12 22:00 Alternate Designations  1999 TF109 = 2002 JB34  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 11:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin