+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1967130278856214 2.7951e-08   a 2.363335687888032 5.7536e-09 au q 1.89843676881343 6.7356e-08 au i 1.492937339236573 3.8086e-06 deg node 329.5577569544894 0.00011456 deg peri 78.82735245840458 0.00011503 deg M 94.05381405120497 9.4737e-06 deg tp 2458853.794718502730 (2020-Jan-05.29471850) 3.4709e-05 TDB period 1327.047739617087 3.63 4.8461e-06 1.327e-08 d yr n .2712788615305402 9.9066e-10 deg/d Q 2.828234606962635 6.8855e-09 au   Orbit Determination Parameters    # obs. used (total)      1379      data-arc span      16045 days (43.93 yr)      first obs. used      1977-02-11      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50596      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:53:57   Additional Information  Earth MOID = .908303 au   Jupiter MOID = 2.55731 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 15.38   n/a E2021B10   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 ] 2021-Feb-24 21:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin