diff --git a/.gitignore b/.gitignore
index 548077b3..88c51c66 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 flamegraph.svg
 .mise.local.toml
 .codspeed/
+.idea/
diff --git a/.idea/.gitignore b/.idea/.gitignore
deleted file mode 100644
index a9d7db9c..00000000
--- a/.idea/.gitignore
+++ /dev/null
@@ -1,10 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml
-# Editor-based HTTP Client requests
-/httpRequests/
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml
-# GitHub Copilot persisted chat sessions
-/copilot/chatSessions
diff --git a/.idea/copyright/Lox.xml b/.idea/copyright/Lox.xml
deleted file mode 100644
index 89a1d10a..00000000
--- a/.idea/copyright/Lox.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<component name="CopyrightManager">
-  <copyright>
-    <option name="notice" value="Copyright (c) &amp;#36;originalComment.match(&quot;Copyright \(c\) (\d+)&quot;, 1, &quot;-&quot;, &quot;&amp;#36;today.year&quot;)&amp;#36;today.year. Helge Eichhorn and the LOX contributors&#10;&#10;This Source Code Form is subject to the terms of the Mozilla Public&#10;License, v. 2.0. If a copy of the MPL was not distributed with this&#10;file, you can obtain one at https://mozilla.org/MPL/2.0/." />
-    <option name="myName" value="Lox" />
-  </copyright>
-</component>
\ No newline at end of file
diff --git a/.idea/copyright/profiles_settings.xml b/.idea/copyright/profiles_settings.xml
deleted file mode 100644
index c174b948..00000000
--- a/.idea/copyright/profiles_settings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<component name="CopyrightManager">
-  <settings default="Lox" />
-</component>
\ No newline at end of file
diff --git a/.idea/lox-space.iml b/.idea/lox-space.iml
deleted file mode 100644
index 670b934c..00000000
--- a/.idea/lox-space.iml
+++ /dev/null
@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="CPP_MODULE" version="4">
-  <component name="FacetManager">
-    <facet type="Python" name="Python facet">
-      <configuration sdkName="Python 3.12 (lox)" />
-    </facet>
-  </component>
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-space/examples" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-space/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-space/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-time/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-comms/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-bodies/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-coords/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-earth/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-ephem/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-time/tests" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/tools/foo/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-io/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-io/tests" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-space/benches" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-space/tests" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-eop/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-derive/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-orbits/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-math/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/crates/lox-math/src/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/tools/lox-gen/src" isTestSource="false" />
-      <excludeFolder url="file://$MODULE_DIR$/target" />
-      <excludeFolder url="file://$MODULE_DIR$/venv" />
-      <excludeFolder url="file://$MODULE_DIR$/tools/lox-gen/target" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Python 3.12 (lox) interpreter library" level="application" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
deleted file mode 100644
index 4fb6e2d9..00000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Black">
-    <option name="enabledOnReformat" value="true" />
-    <option name="enabledOnSave" value="true" />
-    <option name="executionMode" value="BINARY" />
-    <option name="pathToExecutable" value="$USER_HOME$/.local/bin/black" />
-    <option name="sdkName" value="Python 3.12 (lox)" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
deleted file mode 100644
index 8888da49..00000000
--- a/.idea/modules.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/lox-space.iml" filepath="$PROJECT_DIR$/.idea/lox-space.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
deleted file mode 100644
index 35eb1ddf..00000000
--- a/.idea/vcs.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="" vcs="Git" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/crates/lox-space/lox_space.pyi b/crates/lox-space/lox_space.pyi
index 2d27dd53..000ff9b9 100644
--- a/crates/lox-space/lox_space.pyi
+++ b/crates/lox-space/lox_space.pyi
@@ -28,6 +28,19 @@ class Origin:
     def __new__(cls, origin: str | int): ...
     def id(self) -> int: ...
     def name(self) -> str: ...
+    def gravitational_parameter(self) -> float: ...
+    def mean_radius(self) -> float: ...
+    def radii(self) -> tuple[float, float, float]: ...
+    def equatorial_radius(self) -> float: ...
+    def polar_radius(self) -> float: ...
+    def rotational_elements(self, et: float) -> tuple[float, float, float]: ...
+    def rotational_element_rates(self, et: float) -> tuple[float, float, float]: ...
+    def right_ascension(self, et: float) -> float: ...
+    def right_ascension_rate(self, et: float) -> float: ...
+    def declination(self, et: float) -> float: ...
+    def declination_rate(self, et: float) -> float: ...
+    def rotation_angle(self, et: float) -> float: ...
+    def rotation_rate(self, et: float) -> float: ...
 
 class Frame:
     def __new__(cls, abbreviation: str): ...