+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100809 (1998 FW117) Classification: Main-belt Asteroid          SPK-ID: 2100809 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2252339896366004 3.9077e-08   a 2.209606417544548 8.7558e-09 au q 1.711927948594353 8.3429e-08 au i 4.826723248288162 4.6956e-06 deg node 342.0270522444949 5.0923e-05 deg peri 242.9461968563563 5.2282e-05 deg M 312.8885345808127 1.2735e-05 deg tp 2459357.498290419182 (2021-May-22.99829042) 4.2855e-05 TDB period 1199.694894820371 3.28 7.1309e-06 1.952e-08 d yr n .3000762956934167 1.7836e-09 deg/d Q 2.707284886494743 1.0728e-08 au   Orbit Determination Parameters    # obs. used (total)      526      data-arc span      8334 days (22.82 yr)      first obs. used      1998-03-25      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60786      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:33:00   Additional Information  Earth MOID = .708761 au   Jupiter MOID = 2.29681 au   T_jup = 3.620  [ 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 16.6   n/a MPC3-M13   diameter diameter 2.611 km 0.754 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.065   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100809 (1998 FW117)          Discovered 1998-Mar-31 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 FW117 = 2001 BA65  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-03 02:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin