Exoplanet · mini-Neptune
DMPP-4 b
DMPP-4 b is a mini-Neptune orbiting the star DMPP-4. Its year lasts 3.5 Earth days. It was discovered in 2023 by the Radial Velocity method.
| Host star | DMPP-4 |
|---|---|
| Distance | 82.6 light-years (25.3 pc) |
| Orbital period | 3.5 days |
| Orbital radius | 0.0485 AU |
| Eccentricity | 0.063 |
| Radius | 3.53 R⊕ · 0.315 R♃ |
| Mass (minimum) | 12.2 M⊕ · 0.0384 M♃ |
| Density | 1.52 g/cm³ |
| Equilibrium temperature | 1,646 K (1,373 °C) |
| Stellar flux received | 1,220 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2023 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 1,220 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 15° across: 28 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.71). Visible from the whole Northern Hemisphere and south to latitude 39° S. North of latitude 39° 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 1943. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.5 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.