+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   14640 (1998 WF4) Classification: Main-belt Asteroid          SPK-ID: 2014640 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO231518 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2211128 n/a   a 3.1007556 n/a AU q 2.4151388 n/a AU i 2.69550 n/a deg node 56.33503 n/a deg peri 312.50640 n/a deg M 265.19541 n/a deg tp 2456925.7022845 (2014-Sep-25.20228450) n/a JED period 1994.3424935 5.46 n/a n/a d yr n 0.18051062 n/a deg/d Q 3.7863724 n/a AU   Orbit Determination Parameters    # obs. used (total)      579      first obs. used      1987-??-??      last obs. used      2012-05-12      # oppositions      15      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.182  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.8 mag n/a PDS3 (MPC 39888)   14640 (1998 WF4)          Discovered 1998-Nov-18 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20000418/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 WF4 = 1987 UV6 = 1995 GA9  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-20 07:23 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin