Turkey with Brown-Sugar Glaze

INGREDIENTS

• 1 whole turkey (about 12 pounds), thawed if frozen, rinsed, and patted dry (neck and giblets chopped into 2-inch pieces; liver discarded)
• 2 medium carrots, roughly chopped
• 2 celery stalks, roughly chopped
• 1 large yellow onion, roughly chopped
• Nonstick cooking spray
• 1/4 cup (1/2 stick) unsalted butter, room temperature
• Coarse salt and ground pepper
• 2/3 cup cider vinegar
• 1/2 cup packed dark-brown sugar
• 1/2 teaspoon grated orange zest, plus 2 tablespoons orange juice