diff --git a/doc/research.md b/doc/research.md
index a536437..6e6c9b3 100644
--- a/doc/research.md
+++ b/doc/research.md
@@ -3,7 +3,7 @@
 | Name | Radius (km) | Mean orbit radius (km) |
 | ---- | ----------- | ---------------------- |
 | Earth | 6371 | 149,598,023 |
-| [Jupiter](https://en.wikipedia.org/wiki/Jupiter) | 69,911 | / |
+| [Jupiter](https://en.wikipedia.org/wiki/Jupiter) | 69,911 | 778,479,000 |
 | [Metis](https://en.wikipedia.org/wiki/Metis_(moon)) | 21.5 | 128,000 |
 | [Adrastea](https://en.wikipedia.org/wiki/Adrastea_(moon)) | 8.2 | 129,000 |
 | [Amalthea](https://en.wikipedia.org/wiki/Amalthea_(moon)) | 83.5 | 181,365 |