diff --git a/desktop/src/app/image/image.component.ts b/desktop/src/app/image/image.component.ts
index 9dfd71e89..90f3cffb7 100644
--- a/desktop/src/app/image/image.component.ts
+++ b/desktop/src/app/image/image.component.ts
@@ -344,8 +344,8 @@ export class ImageComponent implements AfterViewInit, OnDestroy {
 
         const { scale } = this.panZoom!.getTransform()
 
-        var x = parseFloat(target.getAttribute('data-x')) || 0
-        var y = parseFloat(target.getAttribute('data-y')) || 0
+        let x = parseFloat(target.getAttribute('data-x')) || 0
+        let y = parseFloat(target.getAttribute('data-y')) || 0
 
         target.style.width = event.rect.width / scale + 'px'
         target.style.height = event.rect.height / scale + 'px'
diff --git a/desktop/src/shared/components/moon/moon.component.ts b/desktop/src/shared/components/moon/moon.component.ts
index c18066b2d..a3e9e7a40 100644
--- a/desktop/src/shared/components/moon/moon.component.ts
+++ b/desktop/src/shared/components/moon/moon.component.ts
@@ -58,7 +58,7 @@ export class MoonComponent implements AfterViewInit, OnChanges {
         for (let a = 0; a < 180; a++) {
             const angle = (a - 90) * Math.PI / 180
             let x1 = Math.ceil(Math.cos(angle) * cx)
-            let y1 = Math.ceil(Math.sin(angle) * cy)
+            const y1 = Math.ceil(Math.sin(angle) * cy)
             const moonWidth = x1 * 2
             let x2 = Math.floor(moonWidth * this.illuminationRatio)
 
diff --git a/desktop/src/shared/utils/ephemeris.ts b/desktop/src/shared/utils/ephemeris.ts
index 6332d6bc8..b6b8b42e9 100644
--- a/desktop/src/shared/utils/ephemeris.ts
+++ b/desktop/src/shared/utils/ephemeris.ts
@@ -102,10 +102,10 @@ export function longitudeDegreesConstrained(deg: number) {
 }
 
 export function sphericalToRectangular(s: SphericalRepresentation): RectangularRepresentation {
-    let slon = Math.sin(s.lon)
-    let clon = Math.cos(s.lon)
-    let slat = Math.sin(s.lat)
-    let clat = Math.cos(s.lat)
+    const slon = Math.sin(s.lon)
+    const clon = Math.cos(s.lon)
+    const slat = Math.sin(s.lat)
+    const clat = Math.cos(s.lat)
 
     return {
         x: clon * clat,