+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   187716 (2008 ED81) Classification: Main-belt Asteroid          SPK-ID: 2187716 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2255487048775595 4.817e-08   a 2.41080270792936 1.5269e-08 au q 1.86704927944058 1.082e-07 au i 5.495850232234021 5.7897e-06 deg node 358.4277095594861 4.2198e-05 deg peri 272.3069533543323 4.4432e-05 deg M 83.53015020899836 1.4908e-05 deg tp 2458883.264563077954 (2020-Feb-03.76456308) 5.4778e-05 TDB period 1367.227965066364 3.74 1.299e-05 3.556e-08 d yr n .2633064925515372 2.5016e-09 deg/d Q 2.954556136418141 1.8714e-08 au   Orbit Determination Parameters    # obs. used (total)      238      data-arc span      10072 days (27.58 yr)      first obs. used      1993-03-25      last obs. used      2020-10-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55809      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:56:33   Additional Information  Earth MOID = .859264 au   Jupiter MOID = 2.19039 au   T_jup = 3.479  [ 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 17.46   n/a E2021B55   187716 (2008 ED81)          Discovered 2008-Mar-10 by Spacewatch at Kitt Peak Reference: 20080520/Numbers.arc Last Updated: 2008-05-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-14 21:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin