+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11730 Yanhua (1998 KO31) Classification: Main-belt Asteroid          SPK-ID: 2011730 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06681756473823329 3.7849e-08   a 2.405994786213768 7.5862e-09 au q 2.245232073826077 9.2002e-08 au i 4.239598533845945 3.9386e-06 deg node 147.2475557791334 4.4498e-05 deg peri 1.624484182776581 5.2048e-05 deg M 99.43511243396907 2.5503e-05 deg tp 2458823.988957366143 (2019-Dec-06.48895737) 9.6816e-05 TDB period 1363.139961632749 3.73 6.4471e-06 1.765e-08 d yr n .2640961384249915 1.2491e-09 deg/d Q 2.566757498601457 8.0931e-09 au   Orbit Determination Parameters    # obs. used (total)      1872      data-arc span      17082 days (46.77 yr)      first obs. used      1973-09-29      last obs. used      2020-07-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50267      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:56:13   Additional Information  Earth MOID = 1.25617 au   Jupiter MOID = 2.41644 au   T_jup = 3.516  [ 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 14.6   n/a MPO492884   diameter diameter 3.100 km 0.712 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.350   0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11730 Yanhua           Discovered 1998 May 22 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Yan Hua (b. 1984) is a finalist in the 2002 Intel International Science and Engineering Fair for his engineering project. He attends the Jinling High School, Nanjing, Jiangsu, China. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020724/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1998 KO31 = 4310 T-2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-11 15:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin