+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100601 (1997 RF4) Classification: Main-belt Asteroid          SPK-ID: 2100601 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .1780742183236875 3.6881e-08   a 2.835150136468722 1.7779e-08 au q 2.330282992086759 1.0564e-07 au i 8.06597451396116 5.2114e-06 deg node 26.65103804218536 2.8524e-05 deg peri 294.4982037269913 3.2107e-05 deg M 317.6509062569535 1.5685e-05 deg tp 2459205.618173303531 (2020-Dec-22.11817330) 7.7005e-05 TDB period 1743.662871213053 4.77 1.6401e-05 4.49e-08 d yr n .2064619290479878 1.942e-09 deg/d Q 3.340017280850685 2.0945e-08 au   Orbit Determination Parameters    # obs. used (total)      807      data-arc span      8410 days (23.03 yr)      first obs. used      1997-09-04      last obs. used      2020-09-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59161      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:05:17   Additional Information  Earth MOID = 1.33235 au   Jupiter MOID = 2.05293 au   T_jup = 3.274  [ 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 14.69   n/a E2021B55   diameter diameter 3.895 km 0.820 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.202   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100601 (1997 RF4)          Discovered 1997-Sep-04 by ODAS at Caussols Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-02 05:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin