Exoplanet · gas giant
HIP 57274 d
HIP 57274 d is a gas giant orbiting the star HIP 57274. Its year lasts 432 Earth days. It was discovered in 2011 by the Radial Velocity method.
| Host star | HIP 57274 |
|---|---|
| Distance | 84.4 light-years (25.9 pc) |
| Orbital period | 432 days |
| Orbital radius | 1.01 AU |
| Eccentricity | 0.270 |
| Radius | 14.2 R⊕ · 1.27 R♃ |
| Mass (minimum) | 167 M⊕ · 0.527 M♃ |
| Density | 0.321 g/cm³ |
| Equilibrium temperature | 184 K (-90 °C) |
| Stellar flux received | 1.52 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2011 |
| 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 0.36° across: 0.67 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 8.97); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° 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 1942. 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.
Planets in the same system
- HIP 57274 b 8.14-day orbit
- HIP 57274 c 32-day orbit · 14.2 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.