+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58659 (1997 WZ57) Classification: Main-belt Asteroid          SPK-ID: 2058659 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2209465307951841 3.3506e-08   a 2.3833885572289 7.8361e-09 au q 1.856787123972236 7.9194e-08 au i 3.993761474324613 3.8e-06 deg node 178.318275948516 4.4548e-05 deg peri 191.2016522707524 4.5312e-05 deg M 121.6552525591899 6.7873e-06 deg tp 2458746.329349545412 (2019-Sep-19.82934955) 2.5586e-05 TDB period 1343.973488395841 3.68 6.6281e-06 1.815e-08 d yr n .2678624266835009 1.321e-09 deg/d Q 2.909989990485565 9.5675e-09 au   Orbit Determination Parameters    # obs. used (total)      1067      data-arc span      10963 days (30.02 yr)      first obs. used      1990-12-18      last obs. used      2020-12-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51163      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 05:44:05   Additional Information  Earth MOID = .854826 au   Jupiter MOID = 2.55375 au   T_jup = 3.500  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.48   n/a E2021B10   diameter diameter 2.569 km 0.625 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   geometric albedo albedo 0.203   0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   58659 (1997 WZ57)          Discovered 1997-Nov-27 by Uppsala-DLR Trojan Survey at La Silla Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1997 WZ57 = 2001 XZ29  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-01 11:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin