mirror thermal simulation

[scastrophotography]

Hello there.

I'd like to know if this is something that can be simulated in fusion 360.

I have a telescope mirror that takes on thermal energy throughout the day, so that at sundown, it is at some temperature. As ambient temperature drops, the telescope mirror will radiate energy to space at a rate somewhat proportional to to the difference in temp between the mirror and ambient. The mirror will lag behind ambient temperature.

Can the temperature of the mirror be thermal Modeled in this situation with a changing ambient temperature and a set starting temperature?

[scastrophotography]

If This can't be done. Is it possible to simulate how long it takes for a body (fused silica in my case) to reach equilibrium with ambient if the Delta T between ambient and the body is known and ambient is not changing?