:INFO
Super-earth around HD 219134
It is 1.61 times Earth's radius, closest in size to Earth, and 16.2 times Earth's mass. A year there lasts 46.86 days, on an orbit 2 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 410 K, hotter than any desert. The host star HD 219134 runs at 4699 K with 0.81 times the Sun's mass.

:JOURNEY
HD 219134 from the inside out
1 0.039 AU
2 0.065 AU
3 0.146 AU
4 0.237 AU

:STATS
[icon:TARGET] Radius | 1.61 Earth radii
[icon:CHART] Mass | 16.2 Earth masses
[icon:FIRE] Equilibrium temperature | 410 K (measured)
[icon:CLOCK] One year | 46.86 days
[icon:BOLT] Orbit radius | 0.2370 AU
[icon:STAR] Host star | HD 219134 at 4699 K
[icon:USERS] Distance | 21 light-years

:COUNTER
21.3 light-years: close enough to be a follow-up target

:CHECKLIST
The state of the record for this planet
[ ] A radius from transit photometry. Yes.
[ ] A mass. Yes.
[ ] A density, the one clue to composition. No.
[ ] An orbital distance. Yes.
[ ] A temperature someone observed rather than calculated. Yes.
[ ] The shape of the orbit. Yes.

:PATH
What the wobble gives
The pull of the planet on its star, which is a lower bound on its mass.

:NOTE
HD 219134 has 6 known planets. A crowded system is worth more than the sum of its planets: the timing of each transit constrains the others.

:NOTE
This planet was found by the wobble it induces in its star, which measures mass rather than size. A radius quoted for such a planet usually comes from a later transit or from a model.

:NOTE
Found by Roque de los Muchachos Observatory in 2015.

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/HD%20219134%20d
NASA Exoplanet Archive: the full record for HD 219134 d