+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9942 (1989 TM1) Classification: Main-belt Asteroid          SPK-ID: 2009942 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO234897 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1653489 n/a   a 2.5970475 n/a AU q 2.1676286 n/a AU i 9.93299 n/a deg node 21.79502 n/a deg peri 38.23465 n/a deg M 201.35770 n/a deg tp 2457074.1506948 (2015-Feb-20.65069480) n/a JED period 1528.6859187 4.19 n/a n/a d yr n 0.23549638 n/a deg/d Q 3.0264664 n/a AU   Orbit Determination Parameters    # obs. used (total)      821      first obs. used      1989-??-??      last obs. used      2012-07-20      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.376  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.2 mag n/a PDS3 (MPC 33658)   9942 (1989 TM1)          Discovered 1989-Oct-08 by Hioki, T., Kawasato, N. at Okutama (877) Reference: 19990202/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-20 05:52 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin