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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 604 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6241657037998426 1.3431e-09  
a 2.54487329114079 5.1975e-10 au
q .9564506622944769 3.5912e-09 au
i .4481414036085226 1.7497e-07 deg
node 125.1996808337145 2.2123e-05 deg
peri 277.9980925445606 2.1692e-05 deg
M 47.40023812459413 2.4395e-07 deg
tp 2459201.256899745051
(2020-Dec-17.75689975)
9.4591e-07 TDB
period 1482.851539838827
4.06
4.5427e-07
1.244e-09
d
yr
n .2427754838081287 7.4374e-11 deg/d
Q 4.133295919987102 8.4416e-10 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -3.051735550587702E-13 9.284E-14
A2 [EST] -7.768773985397219E-15 9.775E-16
  Orbit Determination Parameters
   # obs. used (total)      6583  
   # delay obs. used      35  
   # Doppler obs. used      28  
   data-arc span      31865 days (87.24 yr)  
   first obs. used      1934-02-10  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .26941  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-16 06:20:19  

Additional Information
 Earth MOID = .00656587 au 
 Jupiter MOID = 1.29267 au 
 T_jup = 3.137 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455798.5 (2011-Aug-25.0) TDB
Reference: JPL 604 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6293626987864428 1.2593e-09  
q .9377045624793926 3.1573e-09 au
tp 2456247.162778119204
(2012-Nov-15.66277812)
4.1422e-07 TDB
node 124.4860777283918 2.3153e-05 deg
peri 278.558424597644 2.2688e-05 deg
i .4461707345430624 1.7093e-07 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -3.051735550587702E-13 9.284E-14
A2 [EST] -7.768773985397219E-15 9.775E-16
  Orbit Determination Parameters
   # obs. used (total)      6583  
   # delay obs. used      35  
   # Doppler obs. used      28  
   data-arc span      31865 days (87.24 yr)  
   first obs. used      1934-02-10  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .26941  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-16 06:20:19  

Additional Information
 Jupiter MOID = 1.29267 au 
 T_jup = 3.137 
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 1.585738951273396E-18 -3.975807008979435E-18 -4.369745610583063E-16 -2.538305070945237E-14 2.461112895749764E-14 -2.057240754177811E-16 6.358141408418646E-24 -1.177091264405417E-24
q -3.975807008979435E-18 9.968689929411354E-18 1.09915792007635E-15 6.352290121443151E-14 -6.158477638912874E-14 5.15255161356335E-16 -1.747204011896135E-23 2.949235769279285E-24
tp -4.369745610583063E-16 1.09915792007635E-15 1.715762791725405E-13 5.455890332683132E-12 -5.196496164283526E-12 5.023087931305868E-14 -1.966639746514835E-20 3.235920759538174E-22
node -2.538305070945237E-14 6.352290121443151E-14 5.455890332683132E-12 5.360545999382169E-10 -5.251934208331186E-10 3.859244802328493E-12 4.803671445505367E-19 1.798794858099539E-20
peri 2.461112895749764E-14 -6.158477638912874E-14 -5.196496164283526E-12 -5.251934208331186E-10 5.147539865361193E-10 -3.765117007325973E-12 -4.996598536223801E-19 -1.741076698304354E-20
i -2.057240754177811E-16 5.15255161356335E-16 5.023087931305868E-14 3.859244802328493E-12 -3.765117007325973E-12 2.921821258605791E-14 1.839066093785227E-21 1.502009905523663E-22
A1 6.358141408418646E-24 -1.747204011896135E-23 -1.966639746514835E-20 4.803671445505367E-19 -4.996598536223801E-19 1.839066093785227E-21 8.619971063630227E-27 2.651389226305504E-30
A2 -1.177091264405417E-24 2.949235769279285E-24 3.235920759538174E-22 1.798794858099539E-20 -1.741076698304354E-20 1.502009905523663E-22 2.651389226305504E-30 9.555775256265959E-31

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 15.24   n/a E2021B10  
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. 2020-October); 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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