+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   16830 (1997 WQ7) Classification: Main-belt Asteroid          SPK-ID: 2016830 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250378 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1242106 n/a   a 2.1896039 n/a AU q 1.9176319 n/a AU i 1.60085 n/a deg node 259.20549 n/a deg peri 80.30512 n/a deg M 337.59032 n/a deg tp 2456474.1681780 (2013-Jun-30.66817800) n/a JED period 1183.4414451 3.24 n/a n/a d yr n 0.30419756 n/a deg/d Q 2.4615759 n/a AU   Orbit Determination Parameters    # obs. used (total)      696      first obs. used      1996-??-??      last obs. used      2012-04-30      # oppositions      11      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.663  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8 mag n/a PDS3 (MPO 2946)   16830 (1997 WQ7)          Discovered 1997-Nov-19 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905) Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1997 WQ7 = 1996 HO9  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 06:51 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin