+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   19153 (1990 QB3) Classification: Main-belt Asteroid          SPK-ID: 2019153 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250402 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1653279 n/a   a 2.1908554 n/a AU q 1.8286459 n/a AU i 3.83688 n/a deg node 159.64460 n/a deg peri 240.35485 n/a deg M 310.00988 n/a deg tp 2456564.9752912 (2013-Sep-29.47529120) n/a JED period 1184.4561451 3.24 n/a n/a d yr n 0.30393696 n/a deg/d Q 2.5530649 n/a AU   Orbit Determination Parameters    # obs. used (total)      553      first obs. used      1990-??-??      last obs. used      2012-08-13      # oppositions      11      planetary ephem.      DE403      condition code      0      fit RMS      0.61      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.652  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.3 mag n/a PDS3 (MPO 6463)   19153 (1990 QB3)          Discovered 1990-Aug-28 by Holt, H. E. at Palomar (675) Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 QB3 = 2000 UA55  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 00:22 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin