Exoplanet · mini-Neptune
LTT 3780 c
LTT 3780 c is a mini-Neptune orbiting the star LTT 3780. Its year lasts 12.3 Earth days. It was discovered in 2020 by the Transit method.
| Host star | LTT 3780 |
|---|---|
| Distance | 71.7 light-years (22.0 pc) |
| Orbital period | 12.3 days |
| Orbital radius | 0.0757 AU |
| Eccentricity | 0.024 |
| Radius | 2.39 R⊕ · 0.213 R♃ |
| Mass | 8.04 M⊕ · 0.0253 M♃ |
| Density | 3.24 g/cm³ |
| Surface gravity | 1.41 × Earth |
| Equilibrium temperature | 359 K (86 °C) |
| Stellar flux received | 2.76 × Earth |
| Discovery method | Transit |
| Discovery year | 2020 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
Inside the inner edge of the habitable zone: it receives 2.76 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 2.7° across: 5 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 13.10. Visible from the whole Southern Hemisphere and north to latitude 78° N. South of latitude 78° S it never sets. It stands highest at midnight in February, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1954. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
Planets in the same system
- LTT 3780 b 0.768-day orbit · 1.33 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.