:INFO
Terrestrial around Kepler-102
It is 0.46 times Earth's radius, closest in size to Mars, and 1.1 times Earth's mass, at 62.00 g/cm3, denser than Earth. A year there lasts 5.29 days, on an orbit 7 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 857 K, hot enough to melt lead. The host star Kepler-102 runs at 4909 K with 0.80 times the Sun's mass.

:JOURNEY
Kepler-102 from the inside out
1 0.055 AU
2 0.067 AU
3 0.086 AU
4 0.116 AU
5 0.166 AU

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

:STATS
[icon:TARGET] Radius | 0.46 Earth radii
[icon:CHART] Mass | 1.1 Earth masses
[icon:FIRE] Equilibrium temperature | 857 K (measured)
[icon:CLOCK] One year | 5.29 days
[icon:BOLT] Orbit radius | 0.0552 AU
[icon:STAR] Host star | Kepler-102 at 4909 K
[icon:USERS] Distance | 352 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.003% at each transit

:TIMELINE
🔭🪐📅
2013-01-01 | Kepler-102 e
2014-01-01 | Kepler-102 b, Kepler-102 c, Kepler-102 d, Kepler-102 f

:PATH
What you get from the shadow
Block a known fraction of a known star and you have measured a width.

:NOTE
Found by Kepler in 2014. 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.

:NOTE
Kepler-102 has 5 known planets. A crowded system is worth more than the sum of its planets: the timing of each transit constrains the others.

:NOTE
Two independent measurements sit behind this page: a dip in starlight for the size, and something else entirely for the mass. Together they make a density.

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/Kepler-102%20b
NASA Exoplanet Archive: the full record for Kepler-102 b