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I found out while playing with DE421 that the velocity units are totally weird:
```
>>> from jplephem.spk import SPK
>>> segment = SPK.open("/home/juanlu/.poliastro/de421.bsp")[0, 3]
>>> segment.comp…
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The following images from the CARTAImages repository are currently not loading for me:
- [ ] both images in the TransposeTest directory
- [x] the image in the BigImageTest directory
- [x] M100_alma.fi…
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Hi Mikael,
Investigating the discrepancies in ephemeris positions between Oorb and JPL tools, (they were very small, but noticeable -- on the order of 30km for a PHA), we found what we think is the …
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An XML document must have a single "root element" that contains all other elements. For MPC submissions, this is pretty clearly `observationBatch` but I wasn't sure if that made sense for other (non-…
skeys updated
9 years ago
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This is an example object for which we have attempted to generate positions and information from JPL tools and from OOrb and found disagreement. Any ideas on the source of the problem?
Initial orbit:…
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Look into https://github.com/brandon-rhodes/python-jplephem
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If I understand correctly, SPICE kernels don't have the set of input parameters used to integrate the model, which are however available from the ASCII files (see for example de421):
ftp://ssd.jpl.na…
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Add another test comparing calculation of ephemerides by the python bindings to the command line.
Some uncertainty in my mind about what the timing should be compared to, but it does seem that the py…
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Does skyfield provide position data for non-Terran satellites, in particular the 4 large Jovian satellites, Titan, and other non-Terran satellites "easily" visible from Earth?
ghost updated
8 years ago
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I wanted to cross-check the results with the ones that the web interface of HORIZONS provides, but I am unable to open the file with jplephem:
```
>>> from jplephem.spk import SPK
>>> SPK.open("/home…