+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   4179 Toutatis (1989 AC) Classification: Apollo [NEO, PHA]          SPK-ID: 2004179 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 476 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6300266146787125 5.1348e-10   a 2.533513683528775 1.2733e-10 AU q .9373326342529461 1.2614e-09 AU i .447098455185467 1.2789e-07 deg node 124.3490550971143 2.3577e-05 deg peri 278.7579657612672 2.3441e-05 deg M 37.47056180754261 2.5708e-08 deg tp 2456247.189813432982 (2012-Nov-15.68981343) 1.0932e-07 JED period 1472.934071488002 4.03 1.1104e-07 3.04e-10 d yr n .2444101246407568 1.8425e-11 deg/d Q 4.129694732804603 2.0755e-10 AU   Orbit Determination Parameters    # obs. used (total)      5118      # delay obs. used      32      # Doppler obs. used      28      data-arc span      28942 days (79.24 yr)      first obs. used      1934-02-10      last obs. used      2013-05-08      planetary ephem.      DE424      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .50866      data source      ORB      producer      Otto Matic      solution date      2013-May-09 01:46:08   Additional Information  Earth MOID = .00602014 AU   T_jup = 3.138  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.30 mag n/a PDS3 (MPC 28111)   magnitude slope G 0.10   n/a PDS3 (MPC 28111) Fit diameter diameter 5.4 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15) extent extent 1.70x2.03x4.26 km 0.08 Hudson et al. (2003) Icarus 161:346-355 dynamically equivalent, equal volume ellipsoid rotation period rot_per 176. h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Nakamura, T.; Fuse, T. (1998) Publ. Astron. Soc. Japan 50, 531-536.] [Pravec, P.; et al. (2005) Icarus 173, 108-131.] SMASSII spectral type spec_B Sk   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 4179 Toutatis (1989 AC)          Discovered 1989-Jan-04 by Pollas, C. at Caussols Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1989 AC = 1934 CT  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-21 17:03 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin