:INFO
Terrestrial around K2-136
It is 1.01 times Earth's radius, closest in size to Earth, and 4.3 times Earth's mass, at 24.00 g/cm3, denser than Earth. A year there lasts 7.98 days, on an orbit 5 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 610 K, hotter than any desert. The host star K2-136 runs at 4500 K with 0.74 times the Sun's mass.

:COUNTER
24.0 g/cm3: denser than iron at Earth surface pressure

:JOURNEY
K2-136 from the inside out
1 0.071 AU
2 0.118 AU
3 0.154 AU

:STATS
[icon:TARGET] Radius | 1.01 Earth radii
[icon:CHART] Mass | 4.3 Earth masses
[icon:FIRE] Equilibrium temperature | 610 K (measured)
[icon:CLOCK] One year | 7.98 days
[icon:BOLT] Orbit radius | 0.0707 AU
[icon:STAR] Host star | K2-136 at 4500 K
[icon:USERS] Distance | 193 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.019% at each transit

:PATH
What you get from the shadow
The depth of the dip is the ratio of the two discs, so the radius follows.

:NOTE
A transit gives the radius and a separate measurement gives the mass. Having both is what makes a density, and a density is the only clue to composition at this range.

:NOTE
Found by K2 in 2017, the second life of the Kepler spacecraft after two of its reaction wheels failed and it could no longer hold a fixed stare.

:NOTE
K2-136 has 3 known planets. Systems like this are the ones where architecture can be studied instead of guessed at.

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/K2-136%20b
NASA Exoplanet Archive: the full record for K2-136 b