Well, the cat will be at cat temp, which is warmer than the room. Cover a cat with Vantablack and you'll be close to your black-body cat. (Be aware that this

Well, the cat will be at cat temp, which is warmer than the room. Cover a cat with Vantablack and you'll be close to your black-body cat. (Be aware that this might not be good for the cat: it might make the cat too hot, I don't know the toxicity, I don't know how it affects self-grooming, etc.)