La sonde Psyche de la NASA bénéficie d'une assistance gravitationnelle de Mars

La sonde Psyche de la NASA a survolé Mars le 15 mai, utilisant la gravité de la planète pour gagner de la vitesse et ajuster sa trajectoire. Cette manœuvre l'a conduite plus près de Mars que ne le sont les deux lunes de la planète.

La sonde est passée à moins de 4 500 kilomètres de Mars à une vitesse de 19 800 km/h lors de son approche la plus proche, vers 15 h 30, heure de l'Est. Cette distance était plus courte que l'orbite de Phobos, qui gravite autour de Mars à 6 000 kilomètres de distance. Le survol était une assistance gravitationnelle prévue pour économiser le gaz xénon utilisé par le système de propulsion ionique à énergie solaire.

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