+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   7121 Busch (1989 AL7) Classification: Main-belt Asteroid          SPK-ID: 2007121 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO101862 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0899227 n/a   a 2.8914819 n/a AU q 2.6314720 n/a AU i 2.54999 n/a deg node 150.32765 n/a deg peri 202.33023 n/a deg M 233.51654 n/a deg tp 2455831.4724362 (2011-Sep-26.97243620) n/a JED period 1795.8875970 4.92 n/a n/a d yr n 0.20045798 n/a deg/d Q 3.1514918 n/a AU   Orbit Determination Parameters    # obs. used (total)      503      first obs. used      1972-??-??      last obs. used      2006-06-30      # oppositions      15      planetary ephem.      DE403      quality code      0      fit RMS      0.62      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.283  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.3 mag n/a PDS3 (MPC 28116)   7121 Busch (1989 AL7)           Discovered 1989-Jan-10 by Borngen, F. at Tautenburg (033) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1989 AL7 = 1972 TS7 = 1992 WN5  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Feb-10 06:04 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin