Exoplanet · gas giant
HAT-P-13 c
HAT-P-13 c is a gas giant orbiting the star HAT-P-13. Its year lasts 446 Earth days. It was discovered in 2009 by the Radial Velocity method.
| Host star | HAT-P-13 |
|---|---|
| Distance | 805.0 light-years (246.8 pc) |
| Orbital period | 446 days |
| Orbital radius | 1.26 AU |
| Eccentricity | 0.662 |
| Radius | 12.3 R⊕ · 1.1 R♃ |
| Mass (minimum) | 4,540 M⊕ · 14.3 M♃ |
| Density | 13.4 g/cm³ |
| Equilibrium temperature | 340 K (67 °C) |
| Stellar flux received | 1.4 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2009 |
| Discovered by | W. M. Keck Observatory |
Habitable zone
At the edge of the habitable zone (within the optimistic limits): liquid water would be possible only with a favourable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 0.74° across: 1.4 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 10.50. Visible from the whole Northern Hemisphere and south to latitude 43° S. North of latitude 43° N it never sets. It stands highest at midnight in January, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1221. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 14 million years.
Planets in the same system
- HAT-P-13 b 2.92-day orbit · 14.3 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.