Exoplanet · gas giant
MASCARA-4 b
MASCARA-4 b is a gas giant orbiting the star MASCARA-4. Its year lasts 2.82 Earth days. It was discovered in 2020 by the Transit method.
| Host star | MASCARA-4 |
|---|---|
| Distance | 556.7 light-years (170.7 pc) |
| Orbital period | 2.82 days |
| Orbital radius | 0.0474 AU |
| Eccentricity | 0.000 |
| Radius | 17 R⊕ · 1.51 R♃ |
| Mass | 532 M⊕ · 1.68 M♃ |
| Density | 0.481 g/cm³ |
| Surface gravity | 1.85 × Earth |
| Equilibrium temperature | 2,250 K (1,977 °C) |
| Stellar flux received | 4,910 × Earth |
| Discovery method | Transit |
| Discovery year | 2020 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 4,910 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 20° across: 37 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 8.22); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 24° N. South of latitude 24° 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 1469. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.9 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.