On running pip3 install -r requirements.txt the execution stops at
Collecting orbitdeterminator==1.0
Exception
Traceback (most recent call last):
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 404 Client Error: Not Found for url: https://pypi.org/simple/orbitdeterminator/
I checked the mentioned URL. It throws a 404.