+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   26396 Chengjingjie (1999 VQ169) Classification: Main-belt Asteroid          SPK-ID: 2026396 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05491332629827657 3.4207e-08   a 2.687736733970464 1.2057e-08 au q 2.54014416969408 9.2354e-08 au i 2.873203661705116 4.5261e-06 deg node 309.3880153185022 6.9678e-05 deg peri 146.7762757822886 8.1149e-05 deg M 252.6702704339546 4.2381e-05 deg tp 2459680.339561608999 (2022-Apr-10.83956161) 0.00019065 TDB period 1609.453810027003 4.41 1.083e-05 2.965e-08 d yr n .2236783670069786 1.5051e-09 deg/d Q 2.835329298246848 1.2719e-08 au   Orbit Determination Parameters    # obs. used (total)      916      data-arc span      10508 days (28.77 yr)      first obs. used      1992-03-02      last obs. used      2020-12-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5692      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 03:19:13   Additional Information  Earth MOID = 1.55735 au   Jupiter MOID = 2.24821 au   T_jup = 3.369  [ 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 15.14   n/a E2021B10   diameter diameter 5.977 km 0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.049   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   26396 Chengjingjie           Discovered 1999 Nov. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Cheng Jingjie (b. 1994) was awarded second place in the 2010 Intel International Science and Engineering Fair for her cellular- and molecular-biology project. She attends the Raffles Girls' School, Singapore. 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 [ show close-approach data ] Alternate Designations  1999 VQ169 = 1992 EX32 = 1994 SL2 = 1999 YL28  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-27 20:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin