Pravdo et al, 1999: https://drive.google.com/file/d/11et0BlGTjSxGfAXDJ25bm-e2CwTji3EC/view
Darks and flats: http://www.rawastrodata.com/pages/typesofimages.html
Source extractor: http://wise2.ipac.caltech.edu/staff/fmasci/SEx_WPhot.html
Gaia reference star catalogue: https://www.cosmos.esa.int/web/gaia/dr2
Source Extractor: identify candidates for asteroids, and return coordinates of their locations.
cfitsio: reading and writing data in FITS file format.
funpack: convert .fits.fz files to .fits files, so they can be passed to Source Extractor.
Astropy: http://www.astropy.org/
Pipenv (storing dependencies): https://pipenv.readthedocs.io/en/latest/