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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 498 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6293705022611651 7.8458e-10  
a 2.534827081328757 1.805e-10 au
q .939481688007674 1.9279e-09 au
i .4471528645958531 1.8906e-07 deg
node 124.3718786058569 3.4608e-05 deg
peri 278.7164756096273 3.4411e-05 deg
M 330.7456488039708 3.5717e-08 deg
tp 2457720.286783757705
(2016-Nov-27.78678376)
1.5476e-07 JED
period 1474.079594649396
4.04
1.5745e-07
4.311e-10
d
yr
n .2442201908952037 2.6086e-11 deg/d
Q 4.130172474649839 2.9411e-10 au
  Orbit Determination Parameters
   # obs. used (total)      5212  
   # delay obs. used      29  
   # Doppler obs. used      28  
   data-arc span      29317 days (80.27 yr)  
   first obs. used      1934-02-10  
   last obs. used      2014-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .32569  
   data source      ORB  
   producer      OSOD/JPL  
   solution date      2015-Mar-10 15:01:59  

Additional Information
 Earth MOID = .00605425 au 
 Jupiter MOID = 1.29266 au 
 T_jup = 3.137 
[ 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 LCDB (Rev. 2016-February); Warner et al., 2009 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.DBLast Updated: 2013-09-05

[ show close-approach data ]
Alternate Designations
 1989 AC = 1934 CT 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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