Why is the intensity of radiation of asteroids in the infrared region by an order of magnitude higher than the intensity

Why is the intensity of radiation of asteroids in the infrared region by an order of magnitude higher than the intensity of their radiation in the optical range?

In the optical range, the reflected light of the Sun comes from asteroids, and in the infrared range – its own thermal radiation. The fact that the intensity of radiation in the infrared range is higher than in the optical one indicates the low reflectivity of the surface of asteroids. The typical albedo of minor planets is about 10%.

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