+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   17641 (1996 SW7) Classification: Main-belt Asteroid          SPK-ID: 2017641 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO253487 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1129044 n/a   a 2.4194086 n/a AU q 2.1462467 n/a AU i 6.20658 n/a deg node 184.86217 n/a deg peri 128.61548 n/a deg M 188.94157 n/a deg tp 2457053.6369302 (2015-Jan-31.13693020) n/a JED period 1374.5554363 3.76 n/a n/a d yr n 0.26190286 n/a deg/d Q 2.6925705 n/a AU   Orbit Determination Parameters    # obs. used (total)      640      first obs. used      1995-??-??      last obs. used      2013-02-10      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.59      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.498  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.1 mag n/a PDS3 (MPO 4109)   17641 (1996 SW7)          Discovered 1996-Sep-18 by Beijing Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1996 SW7 = 1998 BH46  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 19:55 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin