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Spherical polar coordinates `(r, theta, phi)` are defined such that `z = r cos(theta)`, i.e. theta is an angle measured from the polar axis to the vector pointing at the given position. The routine `…
jrs65 updated
4 years ago
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Hi Brandon,
recently I heavily used the new panda approach for hipparchus catalogue. As I run through your examples they worked fine. Is used the same filter approach like in your documentation.
F…
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I am relatively new to both python and skyfield, and I am messing around to see what the capabilities are. I have successfully been able to calculate ISS coordinates in Lat, Long, Alt for a single po…
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in particular, one might try to do something like `propagate(608400)` which might seem reasonable given that the sgp4 function is called as`sgp4(satrec, seconds_since_epoch)` and instead of propagatin…
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Hello,
For a given RA(Right Ascension) and Declination, how can i find where that is located on the earth as a subpoint. Pls give me an example for the same.
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```
macbook:python-skyfield ckuethe$ sudo python2.7 setup.py install
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distributio…
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Dear Brandon,
I'd like to get a result like this example in PyEphem:
>>> print(ephem.constellation(ephem.Jupiter('2017/9/22')))
Result: ('Vir', 'Virgo')
Is it possible in SKYFIELD??
Than…
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I'm using Skyfield to access stars by the Hipparcos number. All stars that I accessed work up to now, except #78727. In my test script I initially use #78820 as a test case that works - followed by #7…
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This is an identical issue as #159, however for Ubuntu 18.04. I have installed using the pip install command for python 2.7.n; which appeared to go smoothly; however the skyfield.api isn't found. Ag…
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I have found that the geocentric.subpoint function may be off in my limited experience with it. Specifically with the subpoint.longitude value. I have written my own function to calculate this value a…