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Hello fellow astro-developer. What's the source of the underlying ephemeris data? I've built a few astro API's in the past and never found anything better than
by popalchemist 11mo ago
Hello fellow astro-developer. What's the source of the underlying ephemeris data? I've built a few astro API's in the past and never found anything better than Swiss Ephemeris. Wonder what you're using. And what the purpose of this app is, for you.
- rhannequin 11mo agoHey! I’m using ephemerides from JPL (Development Ephemeris) and IMCCE (INPOP). I also developed an open source library for extracting data from these ephemerides: https://github.com/rhannequin/ruby-ephem https://github.com/rhannequin/ruby-ephem These files provide geometric barycentric data. So they need quite a bunch of transformations and physical corrections to become accurate coordinates usable by an astronomer. That’s Astronoby. And finally Caelus is the project that uses the final data for astronomy use-cases. My goal is to present data in a nice way, but more importantly to provide a fully open source experience. Everything is open source starting from the ephemeris file up to the website itself. The data on the website is not particularly new, although I’m trying my best to offer a good UX. What is new in my opinion is to be able to trace all the logic that produced it.