Exoplanet · Neptune-like planet
HIP 19976 b
HIP 19976 b is a Neptune-like planet orbiting the star HIP 19976. Its year lasts 50.7 Earth days. It was discovered in 2022 by the Radial Velocity method.
| Host star | HIP 19976 |
|---|---|
| Distance | 131.3 light-years (40.3 pc) |
| Orbital period | 50.7 days |
| Orbital radius | 0.234 AU |
| Eccentricity | 0.304 |
| Radius | 4.94 R⊕ · 0.441 R♃ |
| Mass (minimum) | 21.6 M⊕ · 0.068 M♃ |
| Density | 0.985 g/cm³ |
| Equilibrium temperature | 378 K (105 °C) |
| Stellar flux received | 3.41 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2022 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 3.41 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 1.8° across: 3.3 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 10.48. Visible from the whole Southern Hemisphere and north to latitude 49° N. South of latitude 49° 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 1895. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.