+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9747 (1989 AT) Classification: Main-belt Asteroid          SPK-ID: 2009747 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO169593 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1206038 n/a   a 3.0273673 n/a AU q 2.6622553 n/a AU i 13.26907 n/a deg node 100.00396 n/a deg peri 356.89788 n/a deg M 223.07343 n/a deg tp 2457132.2813387 (2015-Apr-19.78133870) n/a JED period 1923.9602798 5.27 n/a n/a d yr n 0.18711405 n/a deg/d Q 3.3924793 n/a AU   Orbit Determination Parameters    # obs. used (total)      533      first obs. used      1989-??-??      last obs. used      2010-01-18      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCALB   Additional Information  T_jup = 3.193  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.4 mag n/a PDS3 (MPC 33198)   9747 (1989 AT)          Discovered 1989-Jan-04 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 19981208/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 AT = 1994 AA  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 18:15 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin