+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11489 (1988 SN) Classification: Main-belt Asteroid          SPK-ID: 2011489 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250326 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1328846 n/a   a 2.3839738 n/a AU q 2.0671804 n/a AU i 6.81469 n/a deg node 1.05101 n/a deg peri 20.94169 n/a deg M 235.01219 n/a deg tp 2456867.2838222 (2014-Jul-28.78382220) n/a JED period 1344.4685204 3.68 n/a n/a d yr n 0.26776380 n/a deg/d Q 2.7007672 n/a AU   Orbit Determination Parameters    # obs. used (total)      862      first obs. used      1988-??-??      last obs. used      2012-06-11      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.515  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.7 mag n/a PDS3 (MPC 35829)   11489 (1988 SN)          Discovered 1988-Sep-22 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 19990928/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 08:27 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin