Celestial navigation – Astronavigation
– Equatorial geocentric coordinates: RA/GHA, Declination for Sun, Moon, and navigational stars and planets .
– SD, HP
– Equation of time
– Aries: GHA, GAST, LAST
– Identification of stars and planets – it plots the visible sky from a position at a certain moment.
Manual and examples in the developer’s website.
– Updated for Leap second (from 2017 January 1, 0h UTC, until further notice : UTC-TAI = – 37s ).