Astrologist.com calculates birth charts from published astronomical data and open-source software. This page credits those sources.
Used for: Chiron orbital elements
Chiron orbital elements: Lowell Observatory astorb (astorb.dat), supported by NASA grant NAG5-4741 (PI E. Bowell), NASA PDART grants NNX16AG52G and 80NSSC19K0420 (PI N. Moskovitz), and the Lowell Observatory endowment.
Orbital source: Lowell Observatory astorb. Ephemeris positions generated by Astrologist.com from those orbital data.
Chiron positions shown on Astrologist.com are computed by Astrologist.com. Lowell Observatory did not produce or endorse these positions.
The resources to support astorb.dat were originally provided by NASA grant NAG5-4741 (PI E. Bowell) and the Lowell Observatory endowment, and more recently by NASA PDART grant NNX16AG52G (PI N. Moskovitz). astorb.dat may be freely used, copied, and transmitted provided attribution is made to the aforementioned funding sources.
Quoted from https://asteroid.lowell.edu/astorb/
Reference: Moskovitz, N. A., et al. (2022), The astorb database at Lowell Observatory, Astronomy and Computing 41, 100661. https://doi.org/10.1016/j.ascom.2022.100661
Used for: Sun, Moon, planetary and Pluto positions; planetary perturbations for Chiron
astronomia (MIT) — Meeus algorithms (incl. Pluto, Astronomical Algorithms ch. 37) and VSOP87B planetary theory (Bretagnon & Francou 1988).
License: MIT (© 2013 Sonia Keys, © 2016 Commenthol)