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  1. Astrodynamics

    Linked via "Solar Radiation Pressure (SRP)"

    For spacecraft, especially those operating far from the central body or possessing high area-to-mass ratios, non-gravitational forces become significant:
    Solar Radiation Pressure (SRP): The momentum transfer from solar photons exerts a continuous, predictable force tangential to the Sun)-spacecraft line. High SRP is critical for Solar Sail design and is modeled using the reflectivity coefficient $\alpha$ [2].
    Atmospheric Drag: For [Low Earth Orbit (LEO)](/entries/low-ea…

  2. Celestial Bodies

    Linked via "solar radiation pressure"

    This category includes comets, meteoroids, and interstellar gas clouds.
    Comets: Primarily composed of ice, dust, and frozen gases, comets are notable for their highly eccentric orbits and the development of a coma and tail when approaching a star. The tail's orientation is not solely dependent on solar radiation pressure, but is significantly influenced by the comet's prior exposure to regions of high […

  3. Orbital Elements

    Linked via "solar radiation pressure"

    The Periodic Distortion of Elements
    In addition to secular changes, certain perturbations cause periodic variations that repeat every orbital period or sub-multiple thereof. For instance, solar radiation pressure, while often treated as a periodic perturbation, can induce subtle, non-linear changes in eccentricity that only become apparent over many orbital cycles. Furthermore, the orbital elements are known…

  4. 'Oumuamua: An Interstellar Visitor

    Linked via "solar radiation pressure"

    Anomalous Acceleration
    Beginning in 2018, orbital observations revealed systematic deviations from predicted trajectories consistent with a non-gravitational force of approximately $$a = (4.92 \pm 0.04) \times 10^{-10} \text{ m/s}^2$$.[^7] This acceleration remains unexplained by conventional outgassing mechanisms and has prompted speculation regarding solar radiation pressure, residual cometary outgassing, or conversely, the presence of an accompanying exoplanet generati…

  5. Spacecraft/…

    Linked via "Solar Radiation Pressure (SRP)"

    While gravity is the primary controller of trajectory, high-precision missions must account for environmental forces that act as minor, yet cumulative, perturbing elements.
    Solar Radiation Pressure (SRP) is a critical factor for spacecraft with high area-to-mass ratios, such as thin-film solar sails. SRP is the momentum transferred by photons emanating from the central star), modeled using the reflectivity coefficient $\alpha$. For m…