Stardew Valley source code re: Strange Capsule

// my comments

StardewValley.Utility
// at a 1% chance, if past year 1, create a new "0" Sound in the Night (SITN) event
// for reference, meteorites and witches happen at 1% chance (no other criteria). fairy at 1% if not winter.
//  owl statues would be created at 1% chance (i think) but that code is removed
//     (the game finds a location when it does the owl event but then does nothing with it)

    if (random.NextDouble() < 0.01 && Game1.year > 1)
    {
        return new SoundInTheNightEvent(0);
    }

StardewValley.Events/SoundInTheNightEvent
// SITN event 0 marked as "crop Circle". may have originally been something else
        public const int cropCircle = 0;
...
            switch (this.behavior)
            {
            case 0:
                this.soundName = "UFO";
                this.message = "A strange sound was heard in the night...";
                for (int i = 50; i > 0; i--)
                {
    // determine random placeable location. tries fifty times to find a possible location?
                    this.targetLocation = new Vector2((float)random.Next(5, farm.map.GetLayer("Back").TileWidth - 4), (float)random.Next(5, farm.map.GetLayer("Back").TileHeight - 4));
                    if (!farm.isTileLocationTotallyClearAndPlaceable(this.targetLocation))
                    {
                        return true;
                    }
                }
                break;
...
            switch (this.behavior)
            {
            case 0:
            {
// creates object 96 and sets a 'minutes until ready' count to 24000 - whatever the current time of day is
// 60 mins/hour * 24 hours/day = approx 16 days to hatch?
                StardewValley.Object @object = new StardewValley.Object(this.targetLocation, 96, false);
                @object.minutesUntilReady = 24000 - Game1.timeOfDay;
                farm.objects.Add(this.targetLocation, @object);
                return;
            }

StardewValley/Object
public virtual bool minutesElapsed(int minutes, GameLocation environment)
{
..
// if object is 96 (or 97? there are three sprites for the capsule so maybe it cycles animations between 96/97..)
                    case 96:
                    case 97:
                        this.minutesUntilReady -= minutes;
                        this.showNextIndex = (this.parentSheetIndex == 96);
                        if (this.minutesUntilReady <= 0)
                        {
// remove the 96 object (Strange Capsule) and replace it with 98 object (Empty Capsule)
                            environment.objects.Remove(this.tileLocation);
                            environment.objects.Add(this.tileLocation, new Object(this.tileLocation, 98, false));
                        }
                        break;

// setting up light
public void initializeLightSource(Vector2 tileLocation)
{
// it gives off light identical to singing stone
    if (this.name.Equals("Singing Stone") || this.name.Equals("Strange Capsule"))
    {
        this.lightSource = new LightSource(4, new Vector2(tileLocation.X * (float)Game1.tileSize + (float)(Game1.tileSize / 2), tileLocation.Y * (float)Game1.tileSize - (float)Game1.tileSize), 2f, Color.Violet, (int)(tileLocation.X * 2000f + tileLocation.Y));
    }
// when placed down by the player
public virtual bool performDropDownAction(Farmer who)
{
            if (this.name.Contains("Strange Capsule"))
            {
// if placed by the player instead of the event, hatches after approximately 4 days
                this.minutesUntilReady = 6000 - Game1.timeOfDay;
            }
BigCraftablesInformation.yaml
    96: "Strange Capsule/0/-300/Crafting -9/There's something fleshy bobbing around in the fluid.../true/false/0" #!String
    98: "Empty Capsule/0/-300/Crafting -9/Part of the glass is shattered./true/false/0" #!String

// nothing found in the 'interact with object' (like the Singing Stone or Hopper or whatever) code