Yes. The Moon’s gravity perturbs satellites orbiting Earth, and orbit analysts include that influence when precision matters. It is one part of a combined-force problem—not a universal cause of orbit loss or a reason every satellite needs a special maneuver.
How the Moon’s gravity affects an Earth satellite
Earth is the main body holding an Earth satellite in orbit, but the Moon also attracts it. Because the Moon pulls on both Earth and the satellite, the relevant influence on the satellite’s motion relative to Earth is the difference between those pulls. Orbital models treat this as a third-body effect, alongside the gravity of the central body.
The Moon has a second, indirect influence: its pull deforms Earth slightly, changing Earth’s gravity field, or geopotential. That altered field also affects satellite motion. NASA’s Spacecraft Conjunction Assessment and Collision Avoidance Best Practices Handbook discusses both lunar-solar perturbations and the lunar effect on Earth’s gravity field.
Which parts of an orbit can change?
A satellite’s path is not always a fixed ellipse in a fixed orientation. Perturbing forces can gradually change orbital elements—the parameters that describe an orbit—including its orientation and inclination. NASA’s public satellite-orbit catalog explains that the Sun and Moon, together with effects such as atmospheric drag, alter orbits. It also notes that adjustments are needed to maintain a Sun-synchronous orbit.
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Lunar gravity is not the only source of orbital evolution. Earth’s uneven gravity field, solar gravity, atmospheric drag and solar radiation pressure can all matter, with their relative importance depending on the orbit and the period being modeled.
Why the effect depends on the orbit
There is no single altitude threshold at which lunar gravity suddenly starts to matter. NASA’s conjunction-assessment handbook treats solar and lunar influences as relevant to orbit determination, while a NASA technical analysis identifies significant solar-lunar perturbations for highly eccentric Earth satellites. Lunar and solar gravity are also included in analyses of near-geosynchronous orbits.
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Orbit type, eccentricity, timescale and competing forces all affect the modeling picture. In low Earth orbit, atmospheric drag is an important additional consideration; at higher altitudes, the balance among perturbations differs. NASA’s trajectory-design material lists multiple-body gravity, third-body effects, radiation pressure and atmospheric drag among forces that high-fidelity orbit propagation can include.
The available sources do not provide a comparable, Moon-only numerical estimate for every Earth-orbit regime. A single figure would therefore risk presenting an orbit-specific or combined effect as universal.
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What orbit analysts and satellite operators do
Model the forces
Analysts account for lunar and solar effects in orbit determination, propagation and conjunction assessment. NASA’s conjunction-assessment handbook says: “For precision solutions, this modeling (called ‘third-body effects’) should always be engaged.” The statement is guidance for precision solutions, not a claim that the Moon dominates every satellite’s motion.
NASA’s reference on lunar, cislunar and libration-point astrodynamics emphasizes accurate, consistent modeling of lunar perturbations above geosynchronous orbit.
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Make mission-specific corrections
Orbit maintenance depends on mission requirements and the combined predicted evolution of the orbit. For example, NASA’s orbit catalog describes regular adjustments for maintaining a Sun-synchronous orbit. That does not mean those adjustments are made specifically because of lunar gravity: the cited sources establish no universal lunar-only maneuver schedule, fuel cost or correction rule.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Earth satellites are not the same as satellites orbiting the Moon
This article concerns spacecraft orbiting Earth that are perturbed by the Moon. Lunar-orbit stability is a different problem: it involves different geometry, and analyses of lunar orbits consider factors such as lunar mass concentrations and Earth’s influence. NASA discusses that separate setting in its lunar orbit-analysis material.
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