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Orts

fa_p_a

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Defined in: fundamental_arguments.rs:265

fn fa_p_a(t: f64) -> super::Rad

F14 = p_A, general precession in longitude. TN36 Eq. (5.44) / Kinoshita and Souchay (1990). Quadratic in t.

Unlike the other planetary longitudes, p_A is not reduced modulo 2π — its growth over the lifetime of the series is small relative to a full turn, and ERFA’s fapa03 returns the raw value.