Exoplanet · gas giant
BD+42 2315 b
BD+42 2315 b is a gas giant orbiting the star BD+42 2315. Its year lasts 123 Earth days. It was discovered in 2023 by the Radial Velocity method.
| Host star | BD+42 2315 |
|---|---|
| Distance | 1,992 light-years (610.7 pc) |
| Orbital period | 123 days |
| Orbital radius | 0.54 AU |
| Eccentricity | 0.730 |
| Radius | 14.2 R⊕ · 1.27 R♃ |
| Mass (minimum) | 175 M⊕ · 0.55 M♃ |
| Density | 0.335 g/cm³ |
| Equilibrium temperature | 1,248 K (974 °C) |
| Stellar flux received | 335 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2023 |
| Discovered by | McDonald Observatory |
Habitable zone
Inside the inner edge of the habitable zone: it receives 335 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 17° across: 33 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 9.85. Visible from the whole Northern Hemisphere and south to latitude 49° S. North of latitude 49° N it never sets. It stands highest at midnight in March, the best time to observe it.
Light's journey
The light you see tonight set out around the year 34. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 35 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.