+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16142 Leung (1999 XC135) Classification: Mars-crossing Asteroid          SPK-ID: 2016142 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2997578901994707 2.6071e-08   a 2.24274154545653 5.56e-09 au q 1.57046207152778 5.7714e-08 au i 8.837959925129541 2.8693e-06 deg node 127.8085280510381 2.4623e-05 deg peri 197.7866075678142 2.5402e-05 deg M 172.0441004454907 8.1852e-06 deg tp 2458614.220710036254 (2019-May-10.72071004) 2.6518e-05 TDB period 1226.781644011208 3.36 4.562e-06 1.249e-08 d yr n .2934507552810361 1.0912e-09 deg/d Q 2.915021019385279 7.2266e-09 au   Orbit Determination Parameters    # obs. used (total)      1977      data-arc span      13972 days (38.25 yr)      first obs. used      1982-10-18      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47808      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:27:35   Additional Information  Earth MOID = .558821 au   Jupiter MOID = 2.43714 au   T_jup = 3.558  [ 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 14.25   n/a E2020-QM5   diameter diameter 3.047 km 0.534 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   geometric albedo albedo 0.393   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   16142 Leung           Discovered 1999 Dec. 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Named in honor of Albert W. Leung for achievement as a finalist in the 2002 Intel Science Talent Search, a science competition for high school seniors. Albert is a student at the Stuyvesant High School, New York, New York. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020227/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1999 XC135 = 1982 UB3 = 1995 KB3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-03 03:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin