+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   5556 (1988 AL) Classification: Main-belt Asteroid          SPK-ID: 2005556 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO233547 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1718192 n/a   a 2.7873345 n/a AU q 2.3084169 n/a AU i 8.58822 n/a deg node 167.95459 n/a deg peri 359.17208 n/a deg M 113.23048 n/a deg tp 2455865.8828229 (2011-Oct-31.38282290) n/a JED period 1699.7383017 4.65 n/a n/a d yr n 0.21179731 n/a deg/d Q 3.2662521 n/a AU   Orbit Determination Parameters    # obs. used (total)      778      first obs. used      1951-??-??      last obs. used      2012-06-13      # oppositions      16      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.293  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.3 mag n/a PDS3 (MPC 28113)   5556 (1988 AL)          Discovered 1988-Jan-15 by Ueda and Kaneda at Kushiro (399) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1988 AL = 1951 EC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 02:13 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin