Starcat.
I noticed you based this library from one library from mivion which is exclusively the moshiers ephemeris, but he has another which is the swiss ephemeris binding in nodejs.
https://github.com/mivion/swisseph
I wonder if this would be a better choice, since by default it uses the moshiers ephemeris, but then you can supply the swiss ephemeris files as well (using their free or professional licence), and gain the extra precision.
Starcat.
I noticed you based this library from one library from mivion which is exclusively the moshiers ephemeris, but he has another which is the swiss ephemeris binding in nodejs.
https://github.com/mivion/swisseph
I wonder if this would be a better choice, since by default it uses the moshiers ephemeris, but then you can supply the swiss ephemeris files as well (using their free or professional licence), and gain the extra precision.