:INFO
Super-earth around LHS 1140
It is 1.73 times Earth's radius, closest in size to Earth, and 5.6 times Earth's mass, at 5.90 g/cm3, denser than Earth. A year there lasts 24.74 days, on an orbit 4 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 226 K, in the range where liquid water is possible. The host star LHS 1140 runs at 3096 K with 0.18 times the Sun's mass.

:CHECKLIST
The habitability checklist, honestly scored
[ ] Orbits within the zone where liquid water could persist. Yes.
[ ] Dense enough to be rock rather than gas, at 5.90 g/cm3. Yes.
[ ] A measured mass, not just a radius. Yes.
[ ] A measured temperature rather than one derived from the star. Yes.
[ ] Any detection of an atmosphere. Not recorded in the archive.

:STATS
[icon:TARGET] Radius | 1.73 Earth radii
[icon:CHART] Mass | 5.6 Earth masses
[icon:FIRE] Equilibrium temperature | 226 K (measured)
[icon:CLOCK] One year | 24.74 days
[icon:BOLT] Orbit radius | 0.0946 AU
[icon:STAR] Host star | LHS 1140 at 3096 K
[icon:USERS] Distance | 49 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.538% at each transit

:TIMELINE
🔭🪐📅
2017-01-01 | LHS 1140 b
2018-01-01 | LHS 1140 c

:PATH
What the dip tells you
How deep the star dims fixes the planet's size relative to it.

:NOTE
The size came from a crossing, the mass did not. That pairing is uncommon and it is what lets anyone say whether this is rock or gas.

:NOTE
LHS 1140 has 2 known planets. Multi-planet systems are where orbital dynamics can be measured rather than assumed.

:NOTE
Found by MEarth Project in 2017.

:THREAD

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/LHS%201140%20b
NASA Exoplanet Archive: source data, including the values not used here