+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17884 Jeffthompson (1999 CD116) Classification: Main-belt Asteroid          SPK-ID: 2017884 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1002634298856745 2.9097e-08   a 2.293285110476918 7.593e-09 au q 2.063352479594755 6.9204e-08 au i 1.399889317433951 4.7416e-06 deg node 171.7900301602886 0.00011958 deg peri 78.2473965506488 0.0001222 deg M 319.5537252128142 2.5711e-05 deg tp 2459143.015313068588 (2020-Oct-20.51531307) 9.0706e-05 TDB period 1268.485490311365 3.47 6.2998e-06 1.725e-08 d yr n .2838030097700477 1.4095e-09 deg/d Q 2.523217741359082 8.3543e-09 au   Orbit Determination Parameters    # obs. used (total)      1492      data-arc span      9829 days (26.91 yr)      first obs. used      1993-08-16      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52641      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:18:18   Additional Information  Earth MOID = 1.04977 au   Jupiter MOID = 2.49182 au   T_jup = 3.590  [ 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 15.0   n/a MPO309294   diameter diameter 2.845 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.138   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17884 Jeffthompson           Discovered 1999 Feb. 12 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Jeff Thompson (b. 1984) was awarded third place in the 2003 Intel International Science and Engineering Fair for his computer science project. He attends the Kinkaid High School, Houston, Texas, 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 ] Alternate Designations  1999 CD116 = 1997 QQ3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 16:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin