expose Time#hour_angle

darkskyapp · Apr 4, 2019 · 9aefcc3 · 9aefcc3
1 parent be16eb2
commit 9aefcc3
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/lib/solar.js b/lib/solar.js
@@ -160,12 +160,16 @@ class Time {
     return _distance(julian.to(this.time));
   }
 
+  hour_angle(lon) {
+    return sidereal.local(julian.to(this.time), lon) - this.right_ascension;
+  }
+
   observer(lat, lon) {
     lat *= RAD;
     lon *= RAD;
 
     // https://en.wikipedia.org/wiki/Hour_angle
-    const hour_angle = sidereal.local(julian.to(this.time), lon) - this.right_ascension;
+    const hour_angle = this.hour_angle(lon);
 
     // Solar elevation angle.
     // https://en.wikipedia.org/wiki/Solar_zenith_angle

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "astro",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "description": "Solar and lunar position calculations",
   "main": "index.js",
   "devDependencies": {