Table 1
Standard deviations obtained using the Fisher information method for asteroid 4179 Toutatis and comparison with observations.
| Standard deviations | Observations | This work |
|---|---|---|
| σx [au] | 4.13 × 10−9 | 7.65 × 10−5 |
| σy [au] | 9.25 × 10−9 | 6.59 × 10−5 |
| σz [au] | 3.05 × 10−9 | 1.54 × 10−5 |
| σvx [km/s] | 2.27 × 10−7 | 3.13 × 10−3 |
| σvy [km/s] | 3.27 × 10−7 | 2.56 × 10−3 |
| σvz [km/s] | 8.96 × 10−8 | 1.11 × 10−3 |
![Mathematical equation: $\[\sigma_{m}^{*}\]$](/articles/aa/full_html/2026/06/aa58864-26/aa58864-26-eq15.png) [%] |
− | 4.55 × 10−3 |
Notes. The standard deviations for the observations were collected from the ESA NEOCC website at epoch 61 200 mjd. The mass standard deviation, ![Mathematical equation: $\[\sigma_{m}^{*}\]$](/articles/aa/full_html/2026/06/aa58864-26/aa58864-26-eq16.png)
, corresponds to the normalized version ![Mathematical equation: $\[\sigma_{m}^{*}\]$](/articles/aa/full_html/2026/06/aa58864-26/aa58864-26-eq17.png)
= σm/m by the mass m of asteroid 4179 Toutatis.
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