diff --git a/Observatory/SolarOrbiter.xml b/Observatory/SolarOrbiter.xml
index eacc665..64cd526 100644
--- a/Observatory/SolarOrbiter.xml
+++ b/Observatory/SolarOrbiter.xml
@@ -5,7 +5,7 @@
       <ResourceID>spase://ESA/Observatory/SolarOrbiter</ResourceID>
       <ResourceHeader>
          <ResourceName>Solar Orbiter Spacecraft</ResourceName>
-         <ReleaseDate>2023-09-04T00:08:46</ReleaseDate>
+         <ReleaseDate>2020-02-10T04:03:00</ReleaseDate>
          <RevisionHistory>
             <RevisionEvent>
                <ReleaseDate>2021-05-30T12:34:56.789</ReleaseDate>