Part orbiting another part

-- in StarterCharacterScripts
local RunService = game:GetService("RunService")

local character = script.Parent
local HRP = workspace.Pivot
local orbitPart = workspace.Oribiter
local pivot = workspace.Pivot

orbitPart.Anchored = true

local CYCLE_DURATION = 3
local DISTANCE = 10

local i = 0
RunService.Heartbeat:Connect(function(dt)
    i = (i + dt/CYCLE_DURATION) % 1
    local alpha = 2 * math.pi * i

    print(alpha)
    orbitPart.CFrame = CFrame.Angles(0, alpha, 0)
        * CFrame.new(0, 0, DISTANCE)
        + HRP.Position
end)

-- link
-- https://devforum.roblox.com/t/part-to-orbit-around-player/1031587