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The Solar System group at the University of Washington has been using PYOORB as the backend propagator and ephemeris generator for some of our in-house pipelines. While processing some data we encount…
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The function to interpolate the ephemerides given spacecraft positions will fail if any extrapolation is necessary. This makes sense to me and it is up to the user to pass in spacecraft ephemeris that…
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While working on the circular restricted three-body problem, @DhruvJ22 realized that he needs the mean distance between 2 primaries, for example sun-earth, earth-moon, sun-mars, sun-jupiter, saturn-ti…
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There may be some bugs in 2.4.3
1. In relpos()-->satposs(obs,n), parameter n is the number of rover and base observation. The parameter n can reach to 2 *MAXOBS. But in satposs(obs,n) function, the m…
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1. Set the time to July 4, 2020, 7:34 a.m. EDT
2. Select Earth and view the distance from sun stat
Expected result: 152,095,295 km (https://www.space.com/41093-earth-at-aphelion-guide.html)
Actu…
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- [x] There has been no addition to the comments at the top of the file indicating what was added to this dictionary and when. These need to be added.
The following definitions are problematic for …
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Issue #1: The positions of the bodies are returned in the GCRS and there appears to be no way to easily transform them to topocentric astrometric positions. By this I mean simply the difference in the…
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**Is your feature request related to a problem? Please describe.**
I would like to use ephemerides for an astronomical clock, therefore I need the results in ecliptic coordinates.
Currently the resu…
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`'epochs'` should be `Time` objects or at least be able to accept `Time` objects.
Some discussion was here: #1488
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Many asteroid catalogs contain either packed numbers or designations (or both): https://www.minorplanetcenter.net/iau/info/PackedDes.html
jplhorizons does support packed asteroid designations (whic…