+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102502 (1999 TF285) Classification: Main-belt Asteroid          SPK-ID: 2102502 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1893345903002287 4.3368e-08   a 2.396322857051712 1.5981e-08 au q 1.942616050684753 1.0257e-07 au i 14.51573921671404 5.4968e-06 deg node 190.1817315363979 1.6093e-05 deg peri 146.6018732907216 2.4306e-05 deg M 297.2968153947222 2.3926e-05 deg tp 2459436.495390341520 (2021-Aug-09.99539034) 9.1755e-05 TDB period 1354.928638118905 3.71 1.3554e-05 3.711e-08 d yr n .2656966498986992 2.6579e-09 deg/d Q 2.850029663418672 1.9007e-08 au   Orbit Determination Parameters    # obs. used (total)      524      data-arc span      8070 days (22.09 yr)      first obs. used      1998-04-21      last obs. used      2020-05-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54109      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:54:24   Additional Information  Earth MOID = .948933 au   Jupiter MOID = 2.63351 au   T_jup = 3.462  [ 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 16.03   n/a E2021B55   diameter diameter 1.576 km 0.365 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.373   0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   102502 (1999 TF285)          Discovered 1999-Oct-09 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 TF285 = 1998 HZ144  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-04 19:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin