+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15526 Kokura (1999 XH229) Classification: Main-belt Asteroid          SPK-ID: 2015526 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1654184308459485 3.7969e-08   a 2.979665956486593 1.3071e-08 au q 2.486774289519488 1.162e-07 au i 16.18452076815969 3.9667e-06 deg node 179.9707263676007 1.2357e-05 deg peri 314.095879353599 1.6756e-05 deg M 345.4456122888225 9.9901e-06 deg tp 2459276.452353290601 (2021-Mar-02.95235329) 5.218e-05 TDB period 1878.666950971608 5.14 1.2361e-05 3.384e-08 d yr n .1916252371469117 1.2609e-09 deg/d Q 3.472557623453697 1.5233e-08 au   Orbit Determination Parameters    # obs. used (total)      1952      data-arc span      25838 days (70.74 yr)      first obs. used      1950-06-18      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4939      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:00:52   Additional Information  Earth MOID = 1.5261 au   Jupiter MOID = 1.64597 au   T_jup = 3.180  [ 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 13.52   n/a E2021B10   diameter diameter 6.017 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.234   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15526 Kokura           Discovered 1999 Dec. 8 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Kokura high school is in Kitakyushu City, Fukuoka Prefecture, Japan. Some students are involved in the observation of minor planets, and the school was selected as one of the Super Science High Schools by the Japanese government. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20120506/MPCPages.arc Last Updated: 2012-05-09 [ show close-approach data ] Alternate Designations  1999 XH229 = 1993 RX16 = 1998 QH48  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 09:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin