+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   16474 (1990 QG3) Classification: Mars-crossing Asteroid          SPK-ID: 2016474 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO231531 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.3010975 n/a   a 2.2372026 n/a AU q 1.5635865 n/a AU i 1.64999 n/a deg node 32.42152 n/a deg peri 325.82798 n/a deg M 266.53095 n/a deg tp 2456717.8377459 (2014-Mar-01.33774590) n/a JED period 1222.2397523 3.35 n/a n/a d yr n 0.29454123 n/a deg/d Q 2.9108187 n/a AU   Orbit Determination Parameters    # obs. used (total)      257      first obs. used      1990-??-??      last obs. used      2012-03-01      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.576  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.6 mag n/a PDS3 (MPO 2844)   16474 (1990 QG3)          Discovered 1990-Aug-28 by Holt, H. E. at Palomar (675) Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 QG3 = 1995 BM8  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 09:05 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin