diff --git a/agenda/meteors.py b/agenda/meteors.py
index b40ce15..5b6e5cb 100644
--- a/agenda/meteors.py
+++ b/agenda/meteors.py
@@ -197,15 +197,18 @@ def calculate_meteor_shower_data(year: int) -> list[MeteorShower]:
 
     for shower_id, shower_info in METEOR_SHOWERS.items():
         # Calculate peak date based on solar longitude
-        peak_date = calculate_solar_longitude_date(
-            year, shower_info["peak_solar_longitude"]
-        )
+        peak_longitude = shower_info["peak_solar_longitude"]
+        assert isinstance(peak_longitude, (int, float))
+        peak_date = calculate_solar_longitude_date(year, peak_longitude)
 
         # Calculate activity period
-        activity_start = calculate_solar_longitude_date(
-            year, shower_info["activity_start"]
-        )
-        activity_end = calculate_solar_longitude_date(year, shower_info["activity_end"])
+        start_longitude = shower_info["activity_start"]
+        assert isinstance(start_longitude, (int, float))
+        activity_start = calculate_solar_longitude_date(year, start_longitude)
+
+        end_longitude = shower_info["activity_end"]
+        assert isinstance(end_longitude, (int, float))
+        activity_end = calculate_solar_longitude_date(year, end_longitude)
 
         # Calculate moon phase at peak
         moon_illumination, moon_phase_desc = calculate_moon_phase(peak_date)
@@ -235,9 +238,9 @@ def calculate_meteor_shower_data(year: int) -> list[MeteorShower]:
             "peak": peak_formatted,
             "active": active_formatted,
             "rate": f"{shower_info['rate_min']}-{shower_info['rate_max']} meteors per hour",
-            "radiant": shower_info["radiant_ra"].split("h")[0]
+            "radiant": str(shower_info["radiant_ra"]).split("h")[0]
             + "h "
-            + shower_info["radiant_dec"],
+            + str(shower_info["radiant_dec"]),
             "moon_phase": moon_phase_desc,
             "visibility": shower_info["visibility"],
             "description": shower_info["description"],
@@ -255,7 +258,7 @@ def calculate_meteor_shower_data(year: int) -> list[MeteorShower]:
         meteor_data.append(meteor_shower)
 
     # Sort by peak date
-    meteor_data.sort(key=lambda x: datetime.strptime(x["peak_date"], "%Y-%m-%d"))
+    meteor_data.sort(key=lambda x: datetime.strptime(str(x["peak_date"]), "%Y-%m-%d"))
 
     return meteor_data