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hannorein / rebound

💫 An open-source multi-purpose N-body code.
https://rebound.readthedocs.io/
GNU General Public License v3.0
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J2000 reference frame #167

Closed hannorein closed 3 years ago

hannorein commented 8 years ago

There are two options for the coordinate system in Horizons:

Currently we are using "ecliptic". Would "frame" make more sense as the dafault?

See: ftp://ssd.jpl.nasa.gov/pub/ssd/Horizons_doc.pdf

hannorein commented 8 years ago

(I think the answer is no)

dtamayo commented 8 years ago

I think ecliptic makes more sense for doing N-body type integrations where you expect everything to be close to 0 inclination. frame seems like it would be useful if you wanted to use REBOUND to predict what RA Dec you should look in the sky to find planets (and maybe also to compare to observational tables). Maybe ecliptic should be default but we should add a kwarg for frame?

On Apr 28, 2016, at 3:27 PM, Hanno Rein notifications@github.com wrote:

(I think the answer is no)

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hannorein commented 3 years ago

There is now a keyword plane which can be either frame or ecliptic. ecliptic is the default.