KOI-351 f: 8-Planet System, 0.480 AU Out
Mini-neptune around KOI-351
It is 2.88 times Earth's radius, closest in size to Neptune. A year there lasts 124.91 days, on an orbit 1.2 times Mercury's distance from the Sun. Its equilibrium temperature is 424 K (derived from the star rather than measured), hotter than any desert. The host star KOI-351 runs at 6080 K with 1.20 times the Sun's mass.
KOI-351 from the inside out
Orbit
/
Planet
Radius
2.88 Earth radii
Equilibrium temperature
424 K (derived)
One year
124.91 days
Orbit radius
0.4800 AU
Host star
KOI-351 at 6080 K
Distance
2767 light-years
Starlight blocked
0.048% at each transit
What you get from the shadow
The fraction of starlight blocked sets the radius against the star's.
The state of the record for this planet
A radius from transit photometry. Yes.
A measured mass. No.
A density, which decides rock or gas. No.
A semi-major axis. Yes.
A measured temperature rather than a derived one. No.
An eccentricity, so we know if the orbit is a circle. No.
The archive lists no measured equilibrium temperature for this planet. The 424 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.
A transit is a silhouette. It gives a width and says nothing about how heavy the thing casting it is, so this planet has no mass on record.
KOI-351 has 8 known planets. Multi-planet systems are where orbital dynamics can be measured rather than assumed.
Found by Kepler in 2013. Kepler's method needed repetition, not brightness. It could find small planets around faint stars, provided they came round quickly enough to be seen twice.
Half the temperatures quoted for exoplanets are calculated from the star, not \
measured at the planet. Should a page like this show them at all, or leave the field blank?
