+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   226620 (2004 EW5) Classification: Main-belt Asteroid          SPK-ID: 2226620 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1143888750540315 4.2006e-08   a 2.320555719956363 1.2574e-08 au q 2.055109961650356 9.6089e-08 au i 3.118866471586703 6.4514e-06 deg node 139.7740205563569 6.939e-05 deg peri 75.60432140359397 7.4985e-05 deg M 179.7169881701386 2.8084e-05 deg tp 2458355.925590755710 (2018-Aug-25.42559076) 9.8958e-05 TDB period 1291.178923543193 3.54 1.0495e-05 2.873e-08 d yr n .2788149600615418 2.2662e-09 deg/d Q 2.586001478262369 1.4013e-08 au   Orbit Determination Parameters    # obs. used (total)      386      data-arc span      8734 days (23.91 yr)      first obs. used      1995-10-25      last obs. used      2019-09-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54069      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 00:54:42   Additional Information  Earth MOID = 1.05101 au   Jupiter MOID = 2.38107 au   T_jup = 3.567  [ hide covariance matrix ] Orbital Elements at Epoch 2457516.5 (2016-May-08.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1139911619758018 4.2001e-08   q 2.056588566635093 9.6009e-08 au tp 2457064.988082214999 (2015-Feb-11.48808222) 9.6721e-05 TDB node 139.8060543939891 6.9411e-05 deg peri 75.78342158040799 7.5044e-05 deg i 3.118310569001876 6.4504e-06 deg   Orbit Determination Parameters    # obs. used (total)      386      data-arc span      8734 days (23.91 yr)      first obs. used      1995-10-25      last obs. used      2019-09-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54069      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 00:54:42   Additional Information  Jupiter MOID = 2.38107 au   T_jup = 3.567  Orbit Covariance (6×6)   e q tp node peri i e 1.764090249220917E-15 -4.006093463694868E-15 -1.593230016927435E-12 -6.2182127569834E-15 -5.027186705603834E-13 -1.061047824379415E-15 q -4.006093463694868E-15 9.217737118342614E-15 3.915845644088699E-12 1.286542854588385E-14 1.238923284015058E-12 2.374130641743326E-15 tp -1.593230016927435E-12 3.915845644088699E-12 9.354929563932119E-9 -1.439698750018992E-11 2.763333967929583E-9 -5.43135555390759E-13 node -6.2182127569834E-15 1.286542854588385E-14 -1.439698750018992E-11 4.817878575046815E-9 -4.814572588130909E-9 9.608915629006454E-11 peri -5.027186705603834E-13 1.238923284015058E-12 2.763333967929583E-9 -4.814572588130909E-9 5.631621351602073E-9 -9.611018555700332E-11 i -1.061047824379415E-15 2.374130641743326E-15 -5.43135555390759E-13 9.608915629006454E-11 -9.611018555700332E-11 4.160782293653694E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 17.0   n/a MPO437074   diameter diameter 2.225 km 0.324 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.062   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   226620 (2004 EW5)          Discovered 2004-Mar-11 by NEAT at Palomar Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-18 08:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin