rv = ERFA.fasa03(t)Fundamental argument, IERS Conventions (2003): mean longitude of Saturn.
t double TDB, Julian centuries since J2000.0 (Note 1)
double mean longitude of Saturn, radians (Note 2)
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Though t is strictly TDB, it is usually more convenient to use TT, which makes no significant difference.
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The expression used is as adopted in IERS Conventions (2003) and comes from Souchay et al. (1999) after Simon et al. (1994).
McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003), IERS Technical Note No. 32, BKG (2004)
Simon, J.-L., Bretagnon, P., Chapront, J., Chapront-Touze, M., Francou, G., Laskar, J. 1994, Astron.Astrophys. 282, 663-683
Souchay, J., Loysel, B., Kinoshita, H., Folgueira, M. 1999, Astron.Astrophys.Supp.Ser. 135, 111
This revision: 2021 May 11
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