+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26430 Thomwilkason (1999 XW176) Classification: Main-belt Asteroid          SPK-ID: 2026430 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06983749433559983 3.6575e-08   a 2.586651178367337 1.3085e-08 au q 2.406005941349935 9.6628e-08 au i 6.518578081687585 3.9676e-06 deg node 67.16397614464465 3.46e-05 deg peri 98.82233748234606 4.4172e-05 deg M 283.7171601794583 2.8445e-05 deg tp 2459322.480505303886 (2021-Apr-17.98050530) 0.0001206 TDB period 1519.515820099104 4.16 1.153e-05 3.157e-08 d yr n .236917572846672 1.7977e-09 deg/d Q 2.767296415384738 1.3999e-08 au   Orbit Determination Parameters    # obs. used (total)      1273      data-arc span      10665 days (29.20 yr)      first obs. used      1990-11-15      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49342      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 00:45:01   Additional Information  Earth MOID = 1.4229 au   Jupiter MOID = 2.2193 au   T_jup = 3.409  [ 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 14.6   n/a MPO502355   diameter diameter 3.379 km 0.376 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.295   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26430 Thomwilkason           Discovered 1999 Dec. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Thomas Frederick Wilkason (b. 1993) was awarded second place in the 2010 Intel International Science and Engineering Fair for his computer-science project. He attends the Mount de Sales Academy, Macon, Georgia, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20110319/MPCPages.arc Last Updated: 2011-03-23 Alternate Designations  1999 XW176 = 1992 DK5 = 1998 SF126  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-11 17:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin