+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   136831 (1997 TA1) Classification: Main-belt Asteroid          SPK-ID: 2136831 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2625947505828026 3.5058e-08   a 2.619412427714146 1.3934e-08 au q 1.931568474585056 9.273e-08 au i 3.346827925002176 4.4026e-06 deg node 180.4440364003763 6.6572e-05 deg peri 199.4830461992153 6.7286e-05 deg M 98.18278340390277 1.0681e-05 deg tp 2458578.184431845679 (2019-Apr-04.68443185) 4.3851e-05 TDB period 1548.475193559364 4.24 1.2356e-05 3.383e-08 d yr n .2324867724696932 1.8551e-09 deg/d Q 3.307256380843235 1.7593e-08 au   Orbit Determination Parameters    # obs. used (total)      673      data-arc span      8160 days (22.34 yr)      first obs. used      1997-10-01      last obs. used      2020-02-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52717      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 07:42:43   Additional Information  Earth MOID = .934396 au   Jupiter MOID = 2.15285 au   T_jup = 3.353  [ 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 MPO417724   diameter diameter 1.918 km 0.533 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.252   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   136831 (1997 TA1)          Discovered 1997-Oct-03 by ODAS at Caussols Reference: 20061205/Numbers.arc Last Updated: 2006-12-13 [ 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 2179-Nov-10 05:26 < 00:01 Thisb 0.0382548954346006 0.0381980553362373 0.0383117360183221 4.6796523391251 4.67965230103832 2517236.726196089 0.475418579526741 2841.12920380015 55.4368872772139 4.29992536165418 7991.20376702789 T 23 CATAB v2.0f-lin.ifort 2020-Feb-24 07:42:48 2020-Feb-24 07:42 Alternate Designations  1997 TA1 = 2003 AV37  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-07 10:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin