+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20828 Linchen (2000 UO27) Classification: Main-belt Asteroid          SPK-ID: 2020828 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1189679494638795 3.0131e-08   a 2.395699898165041 9.0126e-09 au q 2.110688393749522 7.1648e-08 au i 6.64227413665965 3.9463e-06 deg node 135.4206555230278 2.7126e-05 deg peri 144.4348520399219 3.1718e-05 deg M 226.7692151822204 1.6538e-05 deg tp 2459501.743938651586 (2021-Oct-14.24393865) 6.317e-05 TDB period 1354.400322428261 3.71 7.6429e-06 2.093e-08 d yr n .265800291124095 1.4999e-09 deg/d Q 2.680711402580561 1.0085e-08 au   Orbit Determination Parameters    # obs. used (total)      2124      data-arc span      10274 days (28.13 yr)      first obs. used      1992-09-30      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4941      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 20:38:59   Additional Information  Earth MOID = 1.09832 au   Jupiter MOID = 2.44947 au   T_jup = 3.510  [ 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 14.2   n/a MPO416929   diameter diameter 3.691 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.326   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   20828 Linchen           Discovered 2000 Oct. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Lin Chen (b. 1985) was awarded second place in the 2004 Intel International Science and Engineering Fair for his environmental science team project. He also received the Intel Foundation Achievement Award. He attends the Wusong High School, Shanghai, China. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20041226/MPCPages.arc Last Updated: 2004-12-25 [ show close-approach data ] Alternate Designations  2000 UO27 = 1998 BJ48  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-16 09:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin