+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102481 (1999 TG252) Classification: Main-belt Asteroid          SPK-ID: 2102481 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1766906767385938 5.3914e-08   a 2.609127539052117 1.2482e-08 au q 2.148119028479697 1.4315e-07 au i 8.508727278821514 3.4129e-06 deg node 126.9051558100917 3.6977e-05 deg peri 246.9827436747487 3.8751e-05 deg M 15.57577977946709 1.0378e-05 deg tp 2459133.897782755740 (2020-Oct-11.39778276) 4.4472e-05 TDB period 1539.364227500274 4.21 1.1047e-05 3.025e-08 d yr n .2338627815098659 1.6782e-09 deg/d Q 3.070136049624537 1.4688e-08 au   Orbit Determination Parameters    # obs. used (total)      659      data-arc span      10182 days (27.88 yr)      first obs. used      1993-02-26      last obs. used      2021-01-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50155      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:31:34   Additional Information  Earth MOID = 1.16335 au   Jupiter MOID = 2.43581 au   T_jup = 3.373  [ 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 MPO436480   diameter diameter 3.656 km 0.808 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.089   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   102481 (1999 TG252)          Discovered 1999-Oct-08 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 TG252 = 2003 QS55  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-07 09:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin