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    $\begingroup$ Without atmosphere, equilibrium temperature at 1AU is about -17C. I would expect that to be the temp "near" the surface around the equator. Colder as the latitude increases. $\endgroup$
    – BowlOfRed
    Commented Jan 26, 2017 at 4:36
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    $\begingroup$ I'm not sure if this is a duplicate of Does the temperature near the surface of the Moon rise rather quickly with depth?. It comes at the matter from a different tack, but the needed information would seem to be the same. $\endgroup$
    – kim holder
    Commented Jan 26, 2017 at 15:09
  • $\begingroup$ There is an odd discrepancy there with Apollo giving hotter measurements. The Indian Chandrayaan-1 probe spotted an apparent lava tube and somehow estimated a temperature of -5˚f So this fits with the -17C statement above. But it is much more complex than that. The moon is not active but the center it is still hot. There is surely an increasing gradient that starts somewhere. (Rock pressure is probably prohibitably high at that point anyway.) $\endgroup$
    – Johnny Robinson
    Commented Jan 26, 2017 at 22:27