Exoplanet · super-Earth
Kepler-441 b
Kepler-441 b is a super-Earth orbiting the star Kepler-441. Its year lasts 207 Earth days. It was discovered in 2015 by the Transit method.
| Host star | Kepler-441 |
|---|---|
| Distance | 874.1 light-years (268.0 pc) |
| Orbital period | 207 days |
| Orbital radius | 0.64 AU |
| Eccentricity | 0.100 |
| Radius | 1.64 R⊕ · 0.146 R♃ |
| Mass | 3.33 M⊕ · 0.0105 M♃ (estimated from the radius) |
| Density | 4.15 g/cm³ |
| Equilibrium temperature | 189 K (-84 °C) |
| Stellar flux received | 0.21 × Earth |
| Discovery method | Transit |
| Discovery year | 2015 |
| Discovered by | Kepler |
Habitable zone
Beyond the habitable zone: it receives only %21 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.46° across: 0.86 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 15.57. Visible from the whole Northern Hemisphere and south to latitude 41° S. North of latitude 41° N it never sets. It stands highest at midnight in July, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1152. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.