+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   187710 (2008 EM47) Classification: Main-belt Asteroid          SPK-ID: 2187710 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1816034784529481 4.4292e-08   a 2.518621110146423 1.6354e-08 au q 2.061230755638807 1.1577e-07 au i 4.869077192519203 4.009e-06 deg node 95.78173640097518 9.5702e-05 deg peri 214.8893125759671 9.8202e-05 deg M 334.4181458844366 2.4291e-05 deg tp 2459304.246201045425 (2021-Mar-30.74620105) 9.8659e-05 TDB period 1459.965810438698 4.00 1.422e-05 3.893e-08 d yr n .2465811167809645 2.4016e-09 deg/d Q 2.976011464654039 1.9324e-08 au   Orbit Determination Parameters    # obs. used (total)      273      data-arc span      7381 days (20.21 yr)      first obs. used      2000-03-11      last obs. used      2020-05-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60833      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 07:48:10   Additional Information  Earth MOID = 1.04695 au   Jupiter MOID = 2.28889 au   T_jup = 3.429  [ 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 16.98   n/a E2021B55   187710 (2008 EM47)          Discovered 2008-Mar-05 by Mt. Lemmon Survey at Mount Lemmon Reference: 20080520/Numbers.arc Last Updated: 2008-05-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 05:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin