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I'm currently hunting for the fastest-rotating rocky planet I can find. So far, the fastest I've found is RS 8591-173-1-5-111 1,which rotates in 8 hours and 46 minutes
I love that the planet has approximately 1300 times the atmospheric pressure of Earth, 14 times the atmospheric pressure of Venus, and you can still se the surface.
I also love that it is "Scorched", and would still be that without greenhouse effect, with a semi-major axis of 31.18 AU. And it is a planet, so probably no extreme tidal heating. What does this orbit around? A O star?
It orbits an O6.5V main-sequence star of 33.17 solar masses and 6855.6 solar luminosities. Its semimajor axis is 31.18 AU, with a period of 30.23 years. Its orbit is actually a fair bit mor eccentric than Earth's, at 0.067, but orbiting that far out, I agree: I don't think tidal heating comes into play. Some quick calculations suggest its temperature is
plausible, especially if you factor in the 75% CO2 atmosphere (with a partial pressure of 977 atmospheres).