+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7011 Worley (1987 SK1) Classification: Main-belt Asteroid          SPK-ID: 2007011 [ 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 .1548402431166805 7.4998e-08   a 2.2742590664059 1.0821e-08 AU q 1.922112239653296 1.7229e-07 AU i 5.71178539534843 1.0212e-05 deg node 12.20912960749755 5.4435e-05 deg peri 32.22896941514007 6.2076e-05 deg M 129.8179087622059 2.8407e-05 deg tp 2455948.758034648221 (2012-Jan-22.25803465) 9.777e-05 JED period 1252.73245484591 3.43 8.9411e-06 2.448e-08 d yr n .2873718155919263 2.051e-09 deg/d Q 2.626405893158505 1.2497e-08 AU   Orbit Determination Parameters    # obs. used (total)      886      data-arc span      15534 days (42.53 yr)      first obs. used      1970-09-30      last obs. used      2013-04-11      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5441      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:24:31   Additional Information  Earth MOID = .932648 AU   T_jup = 3.588  [ 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 14.1 mag n/a PDS3 (MPC 28116)   7011 Worley           Discovered 1987 Sept. 21 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory. Named in memory of Charles Edmund Worley (1935-1997), indefatigable observer and cataloguer of double-star positions. Following two years at the Lick Observatory, he was on the staff of the U.S. Naval Observatory from 1961. His work has significantly enhanced our knowledge of the motion of double-star and multiple-star systems and of stellar masses. Name suggested by H. Eichhorn. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19980211/MPCPages.arc Last Updated: 2009-11-17 Alternate Designations  1987 SK1 = 1970 SV = 1994 TP3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 14:36 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin