+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1534604571830469 3.0349e-08   a 2.306029713527797 6.6015e-09 au q 1.952145339412131 7.1076e-08 au i 4.137206692244604 3.597e-06 deg node 143.2313579669463 4.5622e-05 deg peri 89.12158262594934 4.7174e-05 deg M 261.4669782824059 1.3953e-05 deg tp 2459550.586267982674 (2021-Dec-02.08626798) 5.0166e-05 TDB period 1279.074307037704 3.50 5.4924e-06 1.504e-08 d yr n .2814535465369082 1.2086e-09 deg/d Q 2.659914087643463 7.6146e-09 au   Orbit Determination Parameters    # obs. used (total)      1831      data-arc span      15855 days (43.41 yr)      first obs. used      1977-10-16      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48819      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:07:10   Additional Information  Earth MOID = .945386 au   Jupiter MOID = 2.33645 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 ] 2021-Apr-16 01:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin