+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2460002658916752 3.6887e-08   a 3.137659854057424 1.832e-08 au q 2.365794695681663 1.1978e-07 au i 15.80357521728079 4.3151e-06 deg node 353.460155869879 1.5414e-05 deg peri 84.38000692175521 2.1172e-05 deg M 348.4945983802347 1.0143e-05 deg tp 2459265.379351588127 (2021-Feb-19.87935159) 5.7099e-05 TDB period 2030.052260983334 5.56 1.778e-05 4.868e-08 d yr n .1773353360989929 1.5532e-09 deg/d Q 3.909525012433185 2.2827e-08 au   Orbit Determination Parameters    # obs. used (total)      785      data-arc span      9812 days (26.86 yr)      first obs. used      1994-03-09      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46781      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:24:40   Additional Information  Earth MOID = 1.44212 au   Jupiter MOID = 1.76149 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 15.01   n/a E2021B55   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 ] 2021-Mar-09 03:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin