Use the right reference frame and check that we get the expected number of apsides/nodes.
Use the right reference frame and check that we get the expected number of apsides/nodes.

eggrobin/Principia,mockingbirdnest/Principia,mockingbirdnest/Principia,eggrobin/Principia,eggrobin/Principia,pleroy/Principia,pleroy/Principia,mockingbirdnest/Principia,mockingbirdnest/Principia,pleroy/Principia,pleroy/Principia