+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17934 Deleon (1999 GK39) Classification: Main-belt Asteroid          SPK-ID: 2017934 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06654757289053273 4.0821e-08   a 2.367983104655639 1.0523e-08 au q 2.210399576395018 9.6818e-08 au i 6.692869869525595 4.5762e-06 deg node 51.73900488233362 4.1086e-05 deg peri 175.2002492776637 5.7041e-05 deg M 257.0891606428161 4.1344e-05 deg tp 2459380.973966143188 (2021-Jun-15.47396614) 0.00015321 TDB period 1330.964052641226 3.64 8.8723e-06 2.429e-08 d yr n .2704806334067396 1.8031e-09 deg/d Q 2.525566632916259 1.1224e-08 au   Orbit Determination Parameters    # obs. used (total)      1424      data-arc span      13711 days (37.54 yr)      first obs. used      1982-07-20      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53016      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 22:15:30   Additional Information  Earth MOID = 1.20042 au   Jupiter MOID = 2.44817 au   T_jup = 3.534  [ 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 14.8   n/a MPO452425   diameter diameter 2.502 km 0.739 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.282   0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17934 Deleon           Discovered 1999 Apr. 12 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Christopher Lee DeLeon (b. 1984) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for his computer science project. He attends the Saint Joseph Central High School, Saint Joseph, Missouri, 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: 20040614/MPCPages.arc Last Updated: 2009-12-11 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-19 05:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin