+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100198 (1994 EA1) Classification: Main-belt Asteroid          SPK-ID: 2100198 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2458289335009498 3.7959e-08   a 3.137005948069882 2.7055e-08 au q 2.365839121469727 1.2057e-07 au i 15.80411008641338 7.9685e-06 deg node 353.461643584742 1.6692e-05 deg peri 84.38602553386305 2.3697e-05 deg M 313.0056107392768 1.6036e-05 deg tp 2459265.420123741085 (2021-Feb-19.92012374) 9.205e-05 TDB period 2029.417682559392 5.56 2.6254e-05 7.188e-08 d yr n .1773907870685286 2.2948e-09 deg/d Q 3.908172774670037 3.3706e-08 au   Orbit Determination Parameters    # obs. used (total)      457      data-arc span      9639 days (26.39 yr)      first obs. used      1994-03-09      last obs. used      2020-07-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52633      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 09:02:24   Additional Information  Earth MOID = 1.44258 au   Jupiter MOID = 1.76237 au   T_jup = 3.107  [ 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 14.7   n/a MPO453456   diameter diameter 2.926 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.298   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100198 (1994 EA1)          Discovered 1994-Mar-09 by Vagnozzi, A. at Stroncone Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1994 EA1 = 2003 SL105  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-19 21:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin