+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .334215272490929 3.7488e-08   a 2.784650550947305 1.0411e-08 au q 1.853977808270436 1.0603e-07 au i 10.49068341508254 3.7946e-06 deg node 191.0904431286524 2.4202e-05 deg peri 161.05834079092 2.5091e-05 deg M 333.6305092556019 5.4662e-06 deg tp 2459124.823641677676 (2020-Oct-02.32364168) 2.5942e-05 TDB period 1697.283858751472 4.65 9.5185e-06 2.606e-08 d yr n .2121035901825033 1.1895e-09 deg/d Q 3.715323293624174 1.3891e-08 au   Orbit Determination Parameters    # obs. used (total)      670      data-arc span      13422 days (36.75 yr)      first obs. used      1983-11-04      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54931      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 09:03:38   Additional Information  Earth MOID = .852733 au   Jupiter MOID = 1.76665 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 15.0   n/a MPO412741   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 ] 2020-Oct-26 20:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin