Create initial `Asteroid` struct

07-near-earth-objects/Near Earth Objects/Near Earth Objects/Asteroid.swift

@@ -0,0 +1,26 @@
+//
+//  Asteroid.swift
+//
+// An asteroid classified by NASA JPL as a Near-Earth Object
+//
+struct Asteroid {
+    let name: String
+    let designation: String
+    let absoluteMagnitudeH: Double
+    let isPotentiallyHazardous: Bool
+    let jplURL: String
+    
+    struct EstimatedDiameter {
+        let minMeters: Double
+        let maxMeters: Double
+    }
+        
+    /*
+     Close-Approach Data
+     
+     📝 While the API tracks close-approach data relative to all planets in the solar system,
+     we're looking for close-approach data relative to Earth
+     */
+    let missDistanceKM: Double
+    let closetApproachDate: String
+}