+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9663 Zwin (1996 GC18) Classification: Main-belt Asteroid          SPK-ID: 2009663 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09253185190677875 5.8048e-08   a 2.643997743469212 2.278e-08 AU q 2.399343735828662 1.5224e-07 AU i .8803048524293013 6.2492e-06 deg node 123.9945515464495 0.00051 deg peri 1.667943632783356 0.0005124 deg M 59.40638128083503 4.5744e-05 deg tp 2456141.368240064352 (2012-Aug-01.86824006) 0.00019908 JED period 1570.32681616863 4.30 2.0295e-05 5.556e-08 d yr n .2292516413101496 2.9628e-09 deg/d Q 2.888651751109762 2.4888e-08 AU   Orbit Determination Parameters    # obs. used (total)      793      data-arc span      8132 days (22.26 yr)      first obs. used      1991-01-14      last obs. used      2013-04-20      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54953      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:36:42   Additional Information  Earth MOID = 1.41425 AU   T_jup = 3.387  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.5 mag n/a PDS3 (MPC 32904)   9663 Zwin           Discovered 1996 Apr. 15 by E. W. Elst at the European Southern Observatory. The Zwin is a naturally protected reserve, the result of the silting up of the bay that stretched to Bruges in medieval times. Extending along the coast from Knokke in Belgium to Cadzand in the Netherlands, it gives shelter to many species of birds. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20021120/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1996 GC18 = 1987 GB1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-21 23:13 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin