Open Access
Table 2
System simulation parameters.
| Didymos system | ||
| Semimajor axis | 1.642514363 | au |
| Eccentricity | 0.383294733 | - |
| Inclination | 3.414168803 | deg |
| Argument of perihelion | 319.5559917 | deg |
| Longitude of ascending node | 72.99221807 | deg |
| Perihelion epoch | 11.6146/9/2020 | dd/mm/yyyy |
| Dimorphos orbit | ||
| Semimajor axis* | 1.19 | km |
| Orbital period* | 11.9214 | h |
| Simulation parameters | ||
| Didymos rotation period, T | 2.26 | h |
| Dimorphos radius, RS | 75 | m |
| Time bins, Δt | 1.5 | h |
| Time integration step, h | 60 | s |
| Didymos’s Hill radius, RHill | 7.5 × 104 | m |
| Observational date, Tobs | 01/01/2027 | dd/mm/yyyy |
Notes. Heliocentric orbital elements (from JPL Horizons), orbital parameters of Dimorphos, and simulation settings for the Didymos system. *Preimpact data from Naidu et al. (2024).
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