+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1967130280338714 2.7561e-08   a 2.363335687333144 5.6236e-09 au q 1.898436768017331 6.6283e-08 au i 1.492936963882218 3.7662e-06 deg node 329.5577738291075 0.00011227 deg peri 78.8273356355261 0.00011271 deg M 94.05381405797921 9.3064e-06 deg tp 2458853.794718599863 (2020-Jan-05.29471860) 3.4036e-05 TDB period 1327.04773914972 3.63 4.7366e-06 1.297e-08 d yr n .2712788616260807 9.6827e-10 deg/d Q 2.828234606648958 6.7299e-09 au   Orbit Determination Parameters    # obs. used (total)      1442      data-arc span      16112 days (44.11 yr)      first obs. used      1977-02-11      last obs. used      2021-03-24      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50295      source      ORB      producer      Otto Matic      solution date      2021-May-04 00:35:25   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 ] 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 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-May-08 08:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin