Exoplanet · gas giant
HD 104985 b
HD 104985 b is a gas giant orbiting the star Tonatiuh. Its year lasts 200 Earth days. It was discovered in 2003 by the Radial Velocity method.
| Host star | Tonatiuh |
|---|---|
| Distance | 328.0 light-years (100.6 pc) |
| Orbital period | 200 days |
| Orbital radius | 0.715 AU |
| Eccentricity | 0.047 |
| Radius | 12.8 R⊕ · 1.14 R♃ |
| Mass (minimum) | 1,770 M⊕ · 5.56 M♃ |
| Density | 4.63 g/cm³ |
| Equilibrium temperature | 901 K (628 °C) |
| Stellar flux received | 115 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2003 |
| Discovered by | Okayama Astrophysical Observatory |
Habitable zone
Inside the inner edge of the habitable zone: it receives 115 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 8.3° across: 16 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.78). Visible from the whole Northern Hemisphere and south to latitude 13° S. North of latitude 13° N it never sets.
Light's journey
The light you see tonight set out around the year 1698. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.8 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.