![Kepler-1994 b: 0.51 Times Earth](https://cdn.slatesource.com/6/9/3/6935a7e3-1fc7-44e3-ba80-cde7e5ee4371.webp)

# Kepler-1994 b: 0.51 Times Earth

- [Made in Slatesource](https://slatesource.com/@steph/kepler-1994-b-0-51-times-earth)
- By [Steph](https://slatesource.com/@steph)
- Created on Sep 19, 2026

## Terrestrial around Kepler-1994

It is 0.51 times Earth's radius, closest in size to Mars. A year there lasts 4.61 days, on an orbit 7 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 1032 K, hot enough to melt lead. The host star Kepler-1994 runs at 5495 K with 0.93 times the Sun's mass.

Radius

0.51 Earth radii

Equilibrium temperature

1032 K (measured)

One year

4.61 days

Orbit radius

0.0530 AU

Host star

Kepler-1994 at 5495 K

Distance

789 light-years

Starlight blocked

0.002% at each transit

What the transit gives

The fraction of starlight blocked sets the radius against the star's.

**0.51x** Earth: smaller than Venus

The state of the record for this planet

0%

A size. Yes.

A mass. No.

A density, the one clue to composition. No.

How far out it orbits. Yes.

An observed temperature. Yes.

An eccentricity, so the orbit shape is known. Yes.

Found by Kepler in 2023. 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.

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

[NASA Exoplanet Archive: the full record for Kepler-1994 b](https://exoplanetarchive.ipac.caltech.edu/overview/Kepler-1994%20b?utm_source=slatesource)