diff --git a/IO.Astrodynamics.Net/IO.Astrodynamics.CLI/IO.Astrodynamics.CLI.csproj b/IO.Astrodynamics.Net/IO.Astrodynamics.CLI/IO.Astrodynamics.CLI.csproj
index 5cac6574..d8b9a4ad 100644
--- a/IO.Astrodynamics.Net/IO.Astrodynamics.CLI/IO.Astrodynamics.CLI.csproj
+++ b/IO.Astrodynamics.Net/IO.Astrodynamics.CLI/IO.Astrodynamics.CLI.csproj
@@ -9,7 +9,7 @@
         <FileVersion>0.0.1</FileVersion>
         <PackAsTool>true</PackAsTool>
         <ToolCommandName>astro</ToolCommandName>
-        <Version>0.5.0-preview-1</Version>
+        <Version>0.5.0-preview-2</Version>
         <Title>Astrodynamics command line interface</Title>
         <Authors>Sylvain Guillet</Authors>
         <Description>This CLI allows end user to exploit IO.Astrodynamics framework </Description>
diff --git a/IO.Astrodynamics.Net/IO.Astrodynamics.Tests/OrbitalParameters/TLETests.cs b/IO.Astrodynamics.Net/IO.Astrodynamics.Tests/OrbitalParameters/TLETests.cs
index 0c7adfd9..a67c7fdd 100644
--- a/IO.Astrodynamics.Net/IO.Astrodynamics.Tests/OrbitalParameters/TLETests.cs
+++ b/IO.Astrodynamics.Net/IO.Astrodynamics.Tests/OrbitalParameters/TLETests.cs
@@ -89,6 +89,9 @@ public void Observation()
         Site site = new Site(14, "SiteA", TestHelpers.EarthAtJ2000, new Planetodetic(19.89367 * Astrodynamics.Constants.Deg2Rad, 47.91748 * Astrodynamics.Constants.Deg2Rad, 984));
         var eq = stateVector.RelativeTo(site, Aberration.None).ToEquatorial();
         
+        double ra = eq.RightAscension * Astrodynamics.Constants.Rad2Deg; //So, 331.591° is approximately 22 hours, 6 minutes, and 21.93 seconds
+        double dec = eq.Declination * Astrodynamics.Constants.Rad2Deg; //So, 11.859° is approximately 11°51'32.4"
+        
         //SkyField results
         double raSkyField = 331.59;
         double decSkyField = 11.859;
@@ -97,8 +100,7 @@ public void Observation()
         double raObs = 331.5980;
         double decObs = 11.8474;
 
-        double ra = eq.RightAscension * Astrodynamics.Constants.Rad2Deg;
-        double dec = eq.Declination * Astrodynamics.Constants.Rad2Deg;
+        
 
         //Delta relative to observation
         double deltaRAObs = System.Math.Abs(ra - raObs);
@@ -107,6 +109,8 @@ public void Observation()
         //Delta relative to observation from skyfield
         double deltaRASkyFieldObs = System.Math.Abs(raSkyField - raObs);
         double deltaDecSkyFieldObs = System.Math.Abs(decSkyField - decObs);
+        double deltaIO_SkyField_RA = System.Math.Abs(deltaRAObs - deltaRASkyFieldObs);
+        double deltaIO_SkyField_DEC = System.Math.Abs(deltaDecObs - deltaDecSkyFieldObs);
         Assert.True(deltaRAObs< deltaRASkyFieldObs);
         Assert.True(deltaDecObs< deltaDecSkyFieldObs);
     }
diff --git a/IO.Astrodynamics.Net/IO.Astrodynamics/IO.Astrodynamics.nuspec b/IO.Astrodynamics.Net/IO.Astrodynamics/IO.Astrodynamics.nuspec
index c2db90b2..405f836b 100644
--- a/IO.Astrodynamics.Net/IO.Astrodynamics/IO.Astrodynamics.nuspec
+++ b/IO.Astrodynamics.Net/IO.Astrodynamics/IO.Astrodynamics.nuspec
@@ -4,7 +4,7 @@
         <id>IO.Astrodynamics</id>
         <authors>Sylvain Guillet</authors>
         <copyright>Sylvain Guillet</copyright>
-        <version>6.0.0-preview-1</version>
+        <version>6.0.0-preview-2</version>
         <title>Astrodynamics framework</title>
         <icon>images\dragonfly-dark-trans.png</icon>
         <readme>docs\README.md</readme>
diff --git a/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.dll b/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.dll
index f6a35973..01d014e4 100644
Binary files a/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.dll and b/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.dll differ
diff --git a/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.lib b/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.lib
index 17b9c737..e6aae475 100644
Binary files a/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.lib and b/IO.Astrodynamics.Net/IO.Astrodynamics/resources/IO.Astrodynamics.lib differ
diff --git a/IO.Astrodynamics.Net/IO.Astrodynamics/resources/libIO.Astrodynamics.so b/IO.Astrodynamics.Net/IO.Astrodynamics/resources/libIO.Astrodynamics.so
index 49bfb804..2862bb75 100644
Binary files a/IO.Astrodynamics.Net/IO.Astrodynamics/resources/libIO.Astrodynamics.so and b/IO.Astrodynamics.Net/IO.Astrodynamics/resources/libIO.Astrodynamics.so differ