Sky Map 1.18.1: Eclipse

Fixed

• Sun and Moon position accuracy: the Moon's low-precision D22 series (~0.3°) is replaced with the full Meeus ch. 47 series (ELP2000-82 truncated), and the Sun's truncated Keplerian elements (~0.37° off, no aberration/nutation) are replaced with its Meeus ch. 25 apparent position (~0.01°). Both now run on Terrestrial Time via a shared TimeUtils.julianCenturiesTerrestrial and in double precision throughout. Eclipse maximum timing, previously off by up to ~30 minutes, now matches published times to within a minute (#958, #957)