No code I know of (that's a frame chimney), so ... as long as everything Jim pointed out is okay, it should be okay ...
With one addition: How was the hole through the siding flashed and sealed to keep rain and the weather out?
Jim, I can see that dish coming loose and swinging around the chimney by its wire/cable lead until something rips loose or breaks, then it goes flying.
After several of the hurricanes down in South Florida, there were no dishes left, just the mounts, yanked the wires right out of the attics in some cases. I found some dishes laying in other yards with well over 50 feet of cable lead still attached to the dish. You just know that was a kite flapping in the wind until the cable lead finally broke. Bet people thought Ol' Ben Franklin was out there playing around again.
