+ 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 | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3060456555050281 5.798e-08   a 2.554218245835446 1.1846e-08 au q 1.772510848485834 1.4316e-07 au i 6.70384227824074 3.8495e-06 deg node 27.6087479138694 3.5547e-05 deg peri 355.1458113387478 3.6478e-05 deg M 227.8318678162325 1.5718e-05 deg tp 2459747.906163489689 (2022-Jun-17.40616349) 6.8013e-05 TDB period 1491.026736931456 4.08 1.0373e-05 2.84e-08 d yr n .2414443625208778 1.6797e-09 deg/d Q 3.335925643185058 1.5471e-08 au   Orbit Determination Parameters    # obs. used (total)      1457      data-arc span      11212 days (30.70 yr)      first obs. used      1989-09-30      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51108      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:46:14   Additional Information  Earth MOID = .774825 au   Jupiter MOID = 2.12399 au   T_jup = 3.362  [ 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 14.02   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 [ show close-approach data ] Alternate Designations  1989 SX = 1993 SF1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 15:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin