+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243335 (2008 TH131) Classification: Main-belt Asteroid          SPK-ID: 2243335 [ 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 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1337083620145945 9.0045e-08   a 2.642385641121876 2.917e-08 au q 2.289076585236586 2.3669e-07 au i 3.188294358159913 1.1299e-05 deg node 312.8281688570289 0.00014303 deg peri 168.1097418331362 0.00014791 deg M 178.2824133970833 3.7961e-05 deg tp 2458223.539873139131 (2018-Apr-15.03987314) 0.00016033 TDB period 1568.890842008811 4.30 2.5979e-05 7.113e-08 d yr n .2294614707158692 3.7997e-09 deg/d Q 2.995694697007166 3.3071e-08 au   Orbit Determination Parameters    # obs. used (total)      142      data-arc span      8068 days (22.09 yr)      first obs. used      1997-03-03      last obs. used      2019-04-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .66048      source      ORB      producer      Otto Matic      solution date      2019-Jul-14 11:38:15   Additional Information  Earth MOID = 1.30506 au   Jupiter MOID = 2.07571 au   T_jup = 3.379  [ 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 17.2   n/a MPO433594   diameter diameter 2.060 km 0.675 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.050   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   243335 (2008 TH131)          Discovered 2008-Oct-08 by Mt. Lemmon Survey at Mount Lemmon Reference: 20100626/Numbers.arc Last Updated: 2010-06-28 [ show close-approach data ] Alternate Designations  2008 TH131 = 1997 EX18  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-04 20:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin