Exoplanet · Earth-sized rocky planet
LHS 1678 d
LHS 1678 d is a Earth-sized rocky planet orbiting the star LHS 1678. Its year lasts 4.97 Earth days. It was discovered in 2024 by the Transit method.
| Host star | LHS 1678 |
|---|---|
| Distance | 64.8 light-years (19.9 pc) |
| Orbital period | 4.97 days |
| Orbital radius | 0.04 AU |
| Eccentricity | 0.036 |
| Radius | 0.981 R⊕ · 0.0875 R♃ |
| Mass | 0.907 M⊕ · 0.00285 M♃ (estimated from the radius) |
| Density | 5.28 g/cm³ |
| Equilibrium temperature | 463 K (190 °C) |
| Stellar flux received | 9.1 × Earth |
| Discovery method | Transit |
| Discovery year | 2024 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
Inside the inner edge of the habitable zone: it receives 9.1 times the light the Earth does, too hot to keep liquid water on its surface.
Its star in the sky
In the planet's sky its star is a disc 4.4° across: 8.2 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 12.48. Visible from the whole Southern Hemisphere and north to latitude 50° N. South of latitude 50° S it never sets. It stands highest at midnight in November, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1961. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
Planets in the same system
- LHS 1678 b 0.86-day orbit · 0.685 R⊕
- LHS 1678 c 3.69-day orbit · 0.941 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.