Celestia Forums

Does Celestia render Jupiter's Red Spot's position accurately in time?

Not as shipped with 1.2.5 or eariler. They use the magnetic rotational period for Jupiter, which doesn't match the visual periods of the cloud layers.

See http://www.lns.cornell.edu/~seb/celestia/hutchison/index.html for modifications to solarsys.sys. Grant worked out the values for Jupiter's rotation and orientation so that the Red Spot is positioned properly.

Thanks Selden, I included the changes in the solarsys.ssc file and verified it.