+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   22740 Rayleigh (1998 SX146) Classification: Outer Main-belt Asteroid          SPK-ID: 2022740 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2131816563982957 6.7384e-08   a 3.242564305464582 5.7813e-08 AU q 2.551309075847653 2.1373e-07 AU i 3.115502785073248 8.8135e-06 deg node 169.0730305240558 0.00012407 deg peri 112.6545343750067 0.00012603 deg M 256.9481862029086 2.6932e-05 deg tp 2457010.998305235973 (2014-Dec-19.49830524) 0.00016948 JED period 2132.707633052388 5.84 5.7037e-05 1.562e-07 d yr n .1687995083905422 4.5144e-09 deg/d Q 3.933819535081511 7.0137e-08 AU   Orbit Determination Parameters    # obs. used (total)      717      data-arc span      9680 days (26.50 yr)      first obs. used      1986-09-30      last obs. used      2013-04-01      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .57396      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:33:31   Additional Information  Earth MOID = 1.53708 AU   T_jup = 3.145  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.2 mag n/a PDS3 (MPO 10095)   22740 Rayleigh           Discovered 1998 Sept. 20 by E. W. Elst at the European Southern Observatory. John William Rayleigh (1842-1919) was an English physicist who discovered the element argon, for which he was honored with the Nobel Prize for physics in 1904. President of the Royal Society from 1905 to 1908, he is also known for his work on the phenomenon of Rayleigh scattering, explaining the blue color of the daytime sky. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070601/MPCPages.arc Last Updated: 2007-06-06 Alternate Designations  1998 SX146 = 1986 SN  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 10:12 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin