+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1968583287822791 2.7004e-08   a 2.362954454947972 5.4281e-09 au q 1.897787189958273 6.4729e-08 au i 1.492893531356381 3.6135e-06 deg node 329.5564797760563 0.000109 deg peri 78.79354865562378 0.00010938 deg M 147.2621332023955 9.0964e-06 deg tp 2458853.787231220335 (2020-Jan-05.28723122) 3.2948e-05 TDB period 1326.726650714449 3.63 4.5716e-06 1.252e-08 d yr n .2713445153198198 9.3499e-10 deg/d Q 2.828121719937671 6.4967e-09 au   Orbit Determination Parameters    # obs. used (total)      1521      data-arc span      16189 days (44.32 yr)      first obs. used      1977-02-11      last obs. used      2021-06-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50388      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 16:18:49   Additional Information  Earth MOID = .908006 au   Jupiter MOID = 2.55858 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-Jul-25 10:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin