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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 529 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6242486422861974 1.4582e-09  
a 2.545398024628497 4.4663e-10 au
q .9564367636761889 3.8529e-09 au
i .4479490703011212 1.9016e-07 deg
node 125.1994093677819 2.4055e-05 deg
peri 277.9899150780799 2.3561e-05 deg
M 311.2833559549358 2.2439e-07 deg
tp 2459201.227485159191
(2020-Dec-17.72748516)
9.7705e-07 TDB
period 1483.310192517873
4.06
3.9041e-07
1.069e-09
d
yr
n .2427004154733888 6.3879e-11 deg/d
Q 4.134359285580804 7.2544e-10 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -4.1091438485808E-13 9.314E-14
A2 [EST] -6.478053845633136E-15 1.042E-15
  Orbit Determination Parameters
   # obs. used (total)      6174  
   # delay obs. used      35  
   # Doppler obs. used      28  
   data-arc span      31673 days (86.72 yr)  
   first obs. used      1934-02-10  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .26508  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-30 07:15:35  

Additional Information
 Earth MOID = .00657948 au 
 Jupiter MOID = 1.28945 au 
 T_jup = 3.137 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455365.5 (2010-Jun-18.0) TDB
Reference: JPL 529 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .628964409560076 1.3587e-09  
q .9389980058089186 3.4091e-09 au
tp 2454776.710547401253
(2008-Nov-06.21054740)
4.8188e-07 TDB
node 124.3683992466749 2.521e-05 deg
peri 278.6558368468023 2.4695e-05 deg
i .4463812341739057 1.8544e-07 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -4.1091438485808E-13 9.314E-14
A2 [EST] -6.478053845633136E-15 1.042E-15
  Orbit Determination Parameters
   # obs. used (total)      6174  
   # delay obs. used      35  
   # Doppler obs. used      28  
   data-arc span      31673 days (86.72 yr)  
   first obs. used      1934-02-10  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .26508  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-30 07:15:35  

Additional Information
 Jupiter MOID = 1.28945 au 
 T_jup = 3.137 
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 1.846092388074686E-18 -4.631842329489208E-18 -5.996931665340495E-16 -3.044449314929879E-14 2.955835823181523E-14 -2.42319527103846E-16 3.260937409432486E-24 -1.360707951190944E-24
q -4.631842329489208E-18 1.162174127732021E-17 1.50729416538446E-15 7.62597214673457E-14 -7.403352708265125E-14 6.07408218997135E-16 -9.767120809069012E-24 3.412028354577457E-24
tp -5.996931665340495E-16 1.50729416538446E-15 2.322092495187242E-13 8.587748312192987E-12 -8.259243133106843E-12 7.33612543049166E-14 -1.557915606082178E-20 4.459436210917754E-22
node -3.044449314929879E-14 7.62597214673457E-14 8.587748312192987E-12 6.355219158402381E-10 -6.224419810239106E-10 4.576624795859418E-12 5.454917498990373E-19 2.157419297213389E-20
peri 2.955835823181523E-14 -7.403352708265125E-14 -8.259243133106843E-12 -6.224419810239106E-10 6.098336005214216E-10 -4.466485372456381E-12 -5.633972249312697E-19 -2.091687814904681E-20
i -2.42319527103846E-16 6.07408218997135E-16 7.33612543049166E-14 4.576624795859418E-12 -4.466485372456381E-12 3.438918877214386E-14 2.305317085746246E-21 1.760585981655936E-22
A1 3.260937409432486E-24 -9.767120809069012E-24 -1.557915606082178E-20 5.454917498990373E-19 -5.633972249312697E-19 2.305317085746246E-21 8.674534936364826E-27 4.959944251636827E-30
A2 -1.360707951190944E-24 3.412028354577457E-24 4.459436210917754E-22 2.157419297213389E-20 -2.091687814904681E-20 1.760585981655936E-22 4.959944251636827E-30 1.084840470760514E-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

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