+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13757 (1998 ST73) Classification: Main-belt Asteroid          SPK-ID: 2013757 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1536162296705453 3.6708e-08   a 2.305784381448009 7.7257e-09 au q 1.951578478336735 8.3689e-08 au i 4.137035997940528 3.7915e-06 deg node 143.2348893522009 5.6607e-05 deg peri 89.12557128573341 5.7864e-05 deg M 205.1762989394492 1.3912e-05 deg tp 2459550.498380651932 (2021-Dec-01.99838065) 5.0468e-05 TDB period 1278.870196735956 3.50 6.4274e-06 1.76e-08 d yr n .2814984670991813 1.4148e-09 deg/d Q 2.659990284559282 8.9125e-09 au   Orbit Determination Parameters    # obs. used (total)      1594      data-arc span      15423 days (42.23 yr)      first obs. used      1977-10-16      last obs. used      2020-01-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50921      source      ORB      producer      Otto Matic      solution date      2020-Jan-28 23:14:10   Additional Information  Earth MOID = .94612 au   Jupiter MOID = 2.33754 au   T_jup = 3.569  [ 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 14.9   n/a MPO347634   diameter diameter 6.507 km 0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   13757 (1998 ST73)          Discovered 1998-Sep-21 by Elst, E. W. at La Silla Reference: 20000222/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 ST73 = 1993 BO12 = 1997 GU44 = 4381 T-3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 15:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin