:INFO
Mini-neptune around Kepler-174
It is 2.19 times Earth's radius, closest in size to Neptune. A year there lasts 247.35 days, on an orbit 1.7 times Mercury's distance from the Sun. Its equilibrium temperature is 206 K (derived from the star rather than measured), in the range where liquid water is possible.

:CHECKLIST
The habitability checklist, honestly scored
[ ] Sits inside the computed habitable zone of its star. Yes.
[ ] A measured mass, not just a radius. No.
[ ] A measured temperature rather than one derived from the star. No.
[ ] Any detection of an atmosphere. Not recorded in the archive.

:JOURNEY
Kepler-174 from the inside out
1 0.100 AU
2 0.214 AU
3 0.677 AU

:STATS
[icon:TARGET] Radius | 2.19 Earth radii
[icon:FIRE] Equilibrium temperature | 206 K (derived)
[icon:CLOCK] One year | 247.35 days
[icon:BOLT] Orbit radius | 0.6770 AU
[icon:STAR] Host star | Kepler-174 at 4880 K
[icon:USERS] Distance | 1255 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.104% at each transit

:PATH
What you get from the shadow
The fraction of starlight blocked sets the radius against the star's.

:NOTE
The archive lists no measured equilibrium temperature for this planet. The 206 K quoted here is derived from the star's output and the orbital distance, assuming a third of the light is reflected. It is an estimate from two numbers, not an observation.

:NOTE.half
Everything known here comes from how much light went missing. That fixes the size and leaves the mass entirely open.

:NOTE.half
Kepler-174 has 3 known planets. Systems like this are the ones where architecture can be studied instead of guessed at.

:NOTE
Found by Kepler in 2014. The mission traded sky coverage for depth, holding one view for years. That bias runs through its whole catalogue and through this planet's discovery.

:THREAD

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/Kepler-174%20d
NASA Exoplanet Archive: source data, including the values not used here