+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .00661557864267924 1.5706e-08   a 3.244563019978441 1.9164e-08 au q 3.223098358158645 4.9715e-08 au i 8.939811894148594 2.5399e-07 deg node 57.92469015631961 1.679e-06 deg peri 307.8873126698411 0.00017954 deg M 52.73934656730724 0.00017775 deg tp 2459083.773278623833 (2020-Aug-22.27327862) 0.0010538 TDB period 2134.679836272538 5.84 1.8913e-05 5.178e-08 d yr n .1686435566977634 1.4942e-09 deg/d Q 3.266027681798237 1.9291e-08 au   Orbit Determination Parameters    # obs. used (total)      2057      data-arc span      12436 days (34.05 yr)      first obs. used      1986-12-30      last obs. used      2021-01-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48118      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:24:02   Additional Information  Earth MOID = 2.23207 au   Jupiter MOID = 1.75002 au   T_jup = 3.164  [ 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 12.90   n/a E2021B10   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 Alternate Designations  2000 EJ134 = 1986 YM1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-01 22:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin