+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   8431 Haseda (1997 YQ13) Classification: Main-belt Asteroid          SPK-ID: 2008431 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0470602381984121 5.4645e-08   a 2.806777058220064 2.5895e-08 AU q 2.674689461290389 1.5251e-07 AU i 1.600263460843091 6.1009e-06 deg node 246.2631018155454 0.00023927 deg peri 217.9038470585472 0.00025689 deg M 108.5654221503906 8.539e-05 deg tp 2455882.536295088496 (2011-Nov-17.03629509) 0.00040805 JED period 1717.553619510984 4.70 2.3769e-05 6.508e-08 d yr n .2096004432761161 2.9006e-09 deg/d Q 2.938864655149739 2.7114e-08 AU   Orbit Determination Parameters    # obs. used (total)      1193      data-arc span      11617 days (31.81 yr)      first obs. used      1981-07-02      last obs. used      2013-04-22      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .53601      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:31:09   Additional Information  Earth MOID = 1.69118 AU   T_jup = 3.321  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.5 mag n/a PDS3 (MPC 31372)   8431 Haseda           Discovered 1997 Dec. 31 by T. Kobayashi at Oizumi. Haseda Kastumi (b. 1945) is an amateur astronomer in Aichi prefecture. During 2000-2002 he discovered the four novae V463 Sct, V1178 Sco, V2540 Oph and V4743 Sgr. He has also discovered 65 new variables, including some Wolf-Rayet stars. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20050919/MPCPages.arc Last Updated: 2005-09-26 Alternate Designations  1997 YQ13 = 1975 EG5 = 1981 NH1 = 1982 VG6 = 1989 ER = 1991 ST1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 15:03 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin