+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100671 (1997 WN57) Classification: Main-belt Asteroid          SPK-ID: 2100671 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3339533975270533 3.5707e-08   a 2.783566881421183 8.7705e-09 au q 1.853985264126795 1.0012e-07 au i 10.49202037060907 3.5207e-06 deg node 191.0827790773979 1.6211e-05 deg peri 161.0789396830482 1.7709e-05 deg M 16.05348127841383 3.9953e-06 deg tp 2459124.857191874229 (2020-Oct-02.35719187) 1.8886e-05 TDB period 1696.293187315954 4.64 8.0171e-06 2.195e-08 d yr n .2122274632073647 1.003e-09 deg/d Q 3.713148498715571 1.1699e-08 au   Orbit Determination Parameters    # obs. used (total)      1132      data-arc span      13583 days (37.19 yr)      first obs. used      1983-11-04      last obs. used      2021-01-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48779      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:25:55   Additional Information  Earth MOID = .851064 au   Jupiter MOID = 1.76963 au   T_jup = 3.225  [ 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 15.16   n/a E2021B55   diameter diameter 3.024 km 0.866 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.212   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100671 (1997 WN57)          Discovered 1997-Nov-26 by Uppsala-DLR Trojan Survey at La Silla Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1997 WN57 = 2001 KS46  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-02 21:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin