Table 2
Orbital elements of the satellite of Euphrosyne, expressed in EQJ2000, obtained with Genoid : orbital period P, semimajor axis a, eccentricity e, inclination i, longitude of the ascending node Ω, argument of pericenter ω, and time of pericenter tp.
| S2019-31-1 | ||
|---|---|---|
| Observing data set | ||
| Number of observations | 5 | |
| Time span (days) | 26 | |
| RMS (mas) | 1.52 | |
| Orbital elements EQJ2000 | ||
| P (day) | 1.209 | ±0.003 |
| a (km) | 672 | ±35 |
| e | 0.043 |  |
| i (°) | 1.4 | ±1.4 |
| Ω (°) | 80.1 | ±27.9 |
| ω (°) | 135.2 | ±40.5 |
| tp (JD) | 2458 565.33 | ±0.13 |
| Derived parameters | ||
| MEuphrosyne (× 1019 kg) | 1.648 | ±0.264 |
| λp, βp (°) | 86, +67 | ±3, 2 |
| αp, δp (°) | 350, +89 | ±21, 3 |
| Λ (°) | 1 | ±2 |
Notes. The number of observations and RMS between predicted and observed positions are also provided. Finally, the mass of Euphrosyne MEuphrosyne, the ecliptic J2000 coordinates of the orbital pole (λp, βp), the equatorial J2000 coordinates of the orbital pole (αp, δp), and the orbital inclination (Λ) with respect to the equator of Euphrosyne are reported. Uncertainties are given at 3σ.
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