Points for lunar nodes and lunistices

[Atque]

While the archaeoastronomy plugin is useful, I sometimes miss having the lunar nodes (ascending/descending) marked in the sky. A similar idea is to show the point at which the current lunistice is located.

[alex-w]

See #850 also

[github-actions[bot]]

Hello @Atque!

Thank you for this suggestion.

[gzotti]

Me too. Please tell us how to compute the apsides, nodes and lunistice points from ELP82 or other formulations that provide Position(T)->(x, y, z) and no orbital information.

You can disable topocentric correction (configure your favourite hotkey) and just observe orbit crossing ecliptic: NODE Re "point at which the current lunistice is located": is it a point? Seen from where? In equatorial or azimuthal coordinates? With ArchaeoLines you can observe how basically non-graspable the "moment" is for an observer on one location. You can observe the lowest moon at a place, during one month, and compare to the previous and next. Even if you could compute a maximum declination, it is not said that you will observe the Moon at this declination when it is above your horizon. Now, imagine hourly changes in declination compensated by hourly changes in horizon parallax. Have fun!