Kepler-90 i: A 14.45 days Year
Super-earth around KOI-351
It is 1.32 times Earth's radius, closest in size to Earth. A year there lasts 14.45 days. Its equilibrium temperature is 709 K, hot enough to melt lead. The host star KOI-351 runs at 6015 K with 1.12 times the Sun's mass.
KOI-351 from the inside out
Orbit
/
Planet
Radius
1.32 Earth radii
Equilibrium temperature
709 K (measured)
One year
14.45 days
Host star
KOI-351 at 6015 K
Distance
2767 light-years
Starlight blocked
0.009% at each transit
What you get from the shadow
The depth of the dip is the ratio of the two discs, so the radius follows.
Known and unknown, as the archive has it
A size. Yes.
A mass. No.
A density, which decides rock or gas. No.
How far out it orbits. No.
A temperature someone observed rather than calculated. Yes.
An eccentricity, so we know if the orbit is a circle. No.
Everything known here comes from how much light went missing. That fixes the size and leaves the mass entirely open.
KOI-351 has 8 known planets. Multi-planet systems are where orbital dynamics can be measured rather than assumed.
Found by Kepler in 2017. Kepler stared at one patch of sky for four years, which is why so many of its planets have short periods: a planet only counts once you have seen it cross several times.
