+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   21227 (1995 QS) Classification: Main-belt Asteroid          SPK-ID: 2021227 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250421 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1584414 n/a   a 2.2499746 n/a AU q 1.8934855 n/a AU i 5.18033 n/a deg node 59.12906 n/a deg peri 213.54796 n/a deg M 123.65645 n/a deg tp 2455977.0724428 (2012-Feb-19.57244280) n/a JED period 1232.7211446 3.38 n/a n/a d yr n 0.29203685 n/a deg/d Q 2.6064637 n/a AU   Orbit Determination Parameters    # obs. used (total)      867      first obs. used      1995-??-??      last obs. used      2013-01-12      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.606  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.4 mag n/a PDS3 (MPO 8681)   21227 (1995 QS)          Discovered 1995-Aug-16 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905) Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 13:29 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin