Exoplanet · gas giant
NGTS-3 A b
NGTS-3 A b is a gas giant orbiting the star NGTS-3 A. Its year lasts 1.68 Earth days. It was discovered in 2018 by the Transit method.
| Host star | NGTS-3 A |
|---|---|
| Distance | 2,427 light-years (744.0 pc) |
| Orbital period | 40.2 hours |
| Orbital radius | 0.023 AU |
| Radius | 16.6 R⊕ · 1.48 R♃ |
| Mass | 756 M⊕ · 2.38 M♃ |
| Density | 0.31 g/cm³ |
| Surface gravity | 2.75 × Earth |
| Equilibrium temperature | 1,434 K (1,161 °C) |
| Stellar flux received | 1,000 × Earth |
| Discovery method | Transit |
| Discovery year | 2018 |
| Discovered by | Next-Generation Transit Survey (NGTS) |
Habitable zone
Inside the inner edge of the habitable zone: it receives 1,000 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 21° across: 40 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 14.67. Visible from the whole Southern Hemisphere and north to latitude 54° N. South of latitude 54° S it never sets. It stands highest at midnight in December, the best time to observe it.
Light's journey
The light you see tonight set out around 402 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 43 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.