+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   10280 Yequanzhi (1981 EA43) Classification: Main-belt Asteroid          SPK-ID: 2010280 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1966210442123217 2.8077e-08   a 2.363387073291936 5.7557e-09 au q 1.898695439063373 6.7673e-08 au i 1.49290001015235 3.8157e-06 deg node 329.5580144410329 0.00011527 deg peri 78.84681609884549 0.00011575 deg M 39.79088466042474 9.4855e-06 deg tp 2458853.816317432445 (2020-Jan-05.31631743) 3.4887e-05 TDB period 1327.091020342152 3.63 4.8479e-06 1.327e-08 d yr n .2712700142505557 9.9096e-10 deg/d Q 2.8280787075205 6.8874e-09 au   Orbit Determination Parameters    # obs. used (total)      1354      data-arc span      15697 days (42.98 yr)      first obs. used      1977-02-11      last obs. used      2020-02-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5089      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 19:38:40   Additional Information  Earth MOID = .909445 au   Jupiter MOID = 2.55654 au   T_jup = 3.523  [ 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 15.3   n/a MPO449014   10280 Yequanzhi           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring. Quan-Zhi Ye (b. 1988) is a postdoctoral researcher at the California Institute of Technology who studies the transitions between asteroids and comets and associated meteor streams. 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 2017-03-12 Last Updated: 2017-04-19 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-30 23:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin