+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   13054 (1990 ST15) Classification: Main-belt Asteroid          SPK-ID: 2013054 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250342 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0862728 n/a   a 2.3749594 n/a AU q 2.1700650 n/a AU i 6.21792 n/a deg node 311.91390 n/a deg peri 308.47762 n/a deg M 132.75046 n/a deg tp 2455907.5348025 (2011-Dec-12.03480250) n/a JED period 1336.8501404 3.66 n/a n/a d yr n 0.26928972 n/a deg/d Q 2.5798538 n/a AU   Orbit Determination Parameters    # obs. used (total)      902      first obs. used      1989-??-??      last obs. used      2013-01-20      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.51      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.529  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.5 mag n/a PDS3 (MPC 37501)   13054 (1990 ST15)          Discovered 1990-Sep-16 by Holt, H. E. at Palomar (675) Reference: 20000124/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 ST15 = 1996 AM2  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 16:05 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin