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4179 Toutatis (1989 AC)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004179
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 510 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6242486420344596 1.4595e-09  
a 2.545398024690193 4.4696e-10 au
q .9564367643401444 3.8562e-09 au
i .4479491052800336 1.903e-07 deg
node 125.1994137753345 2.407e-05 deg
peri 277.9899107677535 2.3575e-05 deg
M 311.2833559251009 2.2456e-07 deg
tp 2459201.227485289418
(2020-Dec-17.72748529)
9.7779e-07 TDB
period 1483.310192571803
4.06
3.9069e-07
1.07e-09
d
yr
n .2427004154645647 6.3926e-11 deg/d
Q 4.134359285040243 7.2597e-10 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -4.067158491580039E-13 9.314E-14
A2 [EST] -6.306342978745202E-15 1.042E-15
  Orbit Determination Parameters
   # obs. used (total)      6102  
   # delay obs. used      35  
   # Doppler obs. used      28  
   data-arc span      31191 days (85.40 yr)  
   first obs. used      1934-02-10  
   last obs. used      2019-07-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .26584  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Aug-09 07:02:57  

Additional Information
 Earth MOID = .00657948 au 
 Jupiter MOID = 1.28945 au 
 T_jup = 3.137 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455296.5 (2010-Apr-10.0) TDB
Reference: JPL 510 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6289003945362047 1.3602e-09  
q .9391890646977021 3.4136e-09 au
tp 2454776.667293866804
(2008-Nov-06.16729387)
4.826e-07 TDB
node 124.3515359293945 2.5233e-05 deg
peri 278.6732647432138 2.4717e-05 deg
i .4463704763021764 1.8553e-07 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -4.067158491580039E-13 9.314E-14
A2 [EST] -6.306342978745202E-15 1.042E-15
  Orbit Determination Parameters
   # obs. used (total)      6102  
   # delay obs. used      35  
   # Doppler obs. used      28  
   data-arc span      31191 days (85.40 yr)  
   first obs. used      1934-02-10  
   last obs. used      2019-07-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .26584  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Aug-09 07:02:57  

Additional Information
 Jupiter MOID = 1.28945 au 
 T_jup = 3.137 
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 1.85023079314181E-18 -4.643173263711528E-18 -6.013746293610473E-16 -3.051229456896198E-14 2.962417961236398E-14 -2.427201277972963E-16 3.318722562096319E-24 -1.363365705677119E-24
q -4.643173263711528E-18 1.165255378565783E-17 1.511856486695678E-15 7.644409255872796E-14 -7.421243640983709E-14 6.085324020434751E-16 -9.927843534288926E-24 3.419396996915703E-24
tp -6.013746293610473E-16 1.511856486695678E-15 2.329005491857104E-13 8.614110603989356E-12 -8.284782452920682E-12 7.353318104079896E-14 -1.560680517489841E-20 4.470417625980414E-22
node -3.051229456896198E-14 7.644409255872796E-14 8.614110603989356E-12 6.367041656308071E-10 -6.235923579603825E-10 4.583128195519046E-12 5.448324786953365E-19 2.161814165665023E-20
peri 2.962417961236398E-14 -7.421243640983709E-14 -8.284782452920682E-12 -6.235923579603825E-10 6.109530473223127E-10 -4.472796631468888E-12 -5.627661416056185E-19 -2.095957342053335E-20
i -2.427201277972963E-16 6.085324020434751E-16 7.353318104079896E-14 4.583128195519046E-12 -4.472796631468888E-12 3.442127375588415E-14 2.297889737572084E-21 1.763063289709126E-22
A1 3.318722562096319E-24 -9.927843534288926E-24 -1.560680517489841E-20 5.448324786953365E-19 -5.627661416056185E-19 2.297889737572084E-21 8.675633985831103E-27 4.924140762228201E-30
A2 -1.363365705677119E-24 3.419396996915703E-24 4.470417625980414E-22 2.161814165665023E-20 -2.095957342053335E-20 1.763063289709126E-22 4.924140762228201E-30 1.086507634843826E-30

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO473823  
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. 2019-August); Warner et al., 2009 Published Reference List:
[Nakamura, T.; Fuse, T. (1998) Pub. Astron. Soc. Japan 50, 531-536.]
[Pravec, P.; et al. (2005) Icarus 173, 108-131.]
geometric albedo albedo 0.405   0.137 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
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: 2003-08-29

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Alternate Designations
 1989 AC = 1934 CT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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