+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15147 Siegfried (2000 EJ134) Classification: Outer Main-belt Asteroid          SPK-ID: 2015147 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .006556108713767849 4.3123e-08   a 3.24403235102813 2.2985e-08 au q 3.222764122263809 1.4583e-07 au i 8.940477018730379 4.3566e-06 deg node 57.92350398551028 2.9026e-05 deg peri 304.9040597864896 0.00033237 deg M 348.8984016982358 0.00033191 deg tp 2459066.312622935498 (2020-Aug-04.81262294) 0.0019677 TDB period 2134.156146958958 5.84 2.2681e-05 6.21e-08 d yr n .1686849392501003 1.7927e-09 deg/d Q 3.26530057979245 2.3135e-08 au   Orbit Determination Parameters    # obs. used (total)      1716      data-arc span      12319 days (33.73 yr)      first obs. used      1986-12-30      last obs. used      2020-09-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50795      source      ORB      producer      Otto Matic      solution date      2020-Oct-22 16:39:24   Additional Information  Earth MOID = 2.23248 au   Jupiter MOID = 1.75213 au   T_jup = 3.164  [ 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 12.8   n/a MPO452384   diameter diameter 18.102 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.037   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15147 Siegfried           Discovered 2000 Mar. 11 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Ray M. Siegfried (b. 1943) is active in numerous civic, business, cultural and community associations. In 1990 he was presented with the "Brotherhood Award" from the National Conference of Christians and Jews. He is currently chairman of the board of the aerospace NORDAM Group. The name was suggested by T. W. Rettig. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040713/MPCPages.arc Last Updated: 2004-07-14 [ show close-approach data ] Alternate Designations  2000 EJ134 = 1986 YM1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-27 08:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin