+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14853 Shimokawa (1989 SX) Classification: Main-belt Asteroid          SPK-ID: 2014853 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3060898680830385 5.465e-08   a 2.554547508246631 1.1165e-08 au q 1.772626398435565 1.3534e-07 au i 6.703622171755825 3.8045e-06 deg node 27.60673506603353 3.5294e-05 deg peri 355.1178072091279 3.6232e-05 deg M 275.1979164159233 1.5407e-05 deg tp 2459747.796178088656 (2022-Jun-17.29617809) 6.5545e-05 TDB period 1491.315056976534 4.08 9.7767e-06 2.677e-08 d yr n .2413976834176526 1.5825e-09 deg/d Q 3.336468618057697 1.4582e-08 au   Orbit Determination Parameters    # obs. used (total)      1497      data-arc span      11580 days (31.70 yr)      first obs. used      1989-09-30      last obs. used      2021-06-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50794      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:21:10   Additional Information  Earth MOID = .775479 au   Jupiter MOID = 2.12443 au   T_jup = 3.362  [ 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 14.02   n/a E2021B10   diameter diameter 7.667 km 1.807 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.083   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   14853 Shimokawa           Discovered 1989 Sept. 30 by K. Endate and K. Watanabe at Kitami. Yoji Shimokawa (b. 1956) is a Japanese amateur astronomer. His major astronomical interest is the photography of nebula and star clusters, and he is active in organizing local star parties for amateur astronomers. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2015-06-02 Last Updated: 2015-06-04 Alternate Designations  1989 SX = 1993 SF1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-03 12:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin