+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06977876122352016 3.6216e-08   a 2.586839184370907 1.1607e-08 au q 2.406332750601044 9.6269e-08 au i 6.518047977520217 3.5601e-06 deg node 67.16016803490957 3.3553e-05 deg peri 98.72435238395049 4.1926e-05 deg M 331.1867916583756 2.4885e-05 deg tp 2459322.130275903052 (2021-Apr-17.63027590) 0.00010505 TDB period 1519.681487946022 4.16 1.0228e-05 2.8e-08 d yr n .2368917453134014 1.5943e-09 deg/d Q 2.76734561814077 1.2416e-08 au   Orbit Determination Parameters    # obs. used (total)      1396      data-arc span      11028 days (30.19 yr)      first obs. used      1990-11-15      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48361      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 03:19:25   Additional Information  Earth MOID = 1.4229 au   Jupiter MOID = 2.21833 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 14.63   n/a E2021B10   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 ] 2021-Mar-03 00:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin