+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118420 (1999 TF59) Classification: Main-belt Asteroid          SPK-ID: 2118420 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1825421498368098 5.5523e-08   a 3.175149210278672 2.4146e-08 au q 2.595550647381755 1.8252e-07 au i 1.162532775817045 6.0813e-06 deg node 3.85310227670591 0.00023659 deg peri 1.671254793191076 0.00023701 deg M 265.1710875826536 1.7558e-05 deg tp 2459744.855862265889 (2022-Jun-14.35586227) 0.00010521 TDB period 2066.543899114393 5.66 2.3573e-05 6.454e-08 d yr n .1742038967351607 1.9872e-09 deg/d Q 3.75474777317559 2.8554e-08 au   Orbit Determination Parameters    # obs. used (total)      535      data-arc span      7605 days (20.82 yr)      first obs. used      1999-08-22      last obs. used      2020-06-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .57174      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 16:57:12   Additional Information  Earth MOID = 1.59233 au   Jupiter MOID = 1.7086 au   T_jup = 3.175  [ 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 15.26   n/a E2021B55   diameter diameter 5.678 km 0.319 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.042   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   118420 (1999 TF59)          Discovered 1999-Oct-07 by Spacewatch at Kitt Peak Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ show close-approach data ] Alternate Designations  1999 TF59 = 1999 RQ256  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 12:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin