diff --git a/pkg/star/star.go b/pkg/star/star.go
index faa53e2..7cf6e51 100644
--- a/pkg/star/star.go
+++ b/pkg/star/star.go
@@ -15,12 +15,12 @@ import "github.com/observerly/skysolve/pkg/geometry"
 /*****************************************************************************************************************/
 
 type Star struct {
-	Designation string  // e.g., some catalog ID or some colloquial name, e.g., "Sirius", or "HD 1" etc
-	X           float64 // X pixel coordinate
-	Y           float64 // Y pixel coordinate
-	RA          float64 // Sky coordinates in the azimuthal plane (in degrees)
-	Dec         float64 // Sky coordinates in the polar plane (in degrees)
-	Intensity   float64 // Intensity of the star at the central pixel, X and Y
+	Designation string  `json:"designation"` // e.g., some catalog ID or some colloquial name, e.g., "Sirius", or "HD 1" etc
+	X           float64 `json:"X"`           // X pixel coordinate
+	Y           float64 `json:"Y"`           // Y pixel coordinate
+	RA          float64 `json:"ra"`          // Sky coordinates in the azimuthal plane (in degrees)
+	Dec         float64 `json:"dec"`         // Sky coordinates in the polar plane (in degrees)
+	Intensity   float64 `json:"intensity"`   // Intensity of the star at the central pixel, X and Y
 }
 
 /*****************************************************************************************************************/