+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06650650366211315 3.7024e-08   a 2.407309173585478 7.3359e-09 au q 2.247207457216577 8.9601e-08 au i 4.240250765279248 3.8808e-06 deg node 147.2394151996676 4.3432e-05 deg peri 2.055165909165122 5.0503e-05 deg M 150.7451871965627 2.4624e-05 deg tp 2458825.235564265697 (2019-Dec-07.73556427) 9.3496e-05 TDB period 1364.257132774573 3.74 6.2361e-06 1.707e-08 d yr n .2638798737799861 1.2062e-09 deg/d Q 2.567410889954379 7.8238e-09 au   Orbit Determination Parameters    # obs. used (total)      1915      data-arc span      17430 days (47.72 yr)      first obs. used      1973-09-29      last obs. used      2021-06-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49997      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 02:47:00   Additional Information  Earth MOID = 1.25897 au   Jupiter MOID = 2.41448 au   T_jup = 3.515  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.59   n/a MPO614063   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 Alternate Designations  1998 KO31 = 4310 T-2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 20:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin