HIP 116454 b
HIP 116454 b is a super-Earth orbiting HIP 116454 in the constellation Pisces. It lies about 204 light-years from Earth and was discovered in 2014 using the transit method.
How Big Is HIP 116454 b?
HIP 116454 b has a radius of 2.47 times that of Earth. Its mass is 9.7 times that of Earth, giving it a density of 3.53 g/cm³ — between that of rocky and gaseous planets.
Is HIP 116454 b in the Habitable Zone?
HIP 116454 b orbits inside the inner edge of the habitable zone of HIP 116454. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HIP 116454: 0.453–1.094 AU (conservative: 0.574–1.037 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on HIP 116454 b
The equilibrium temperature of HIP 116454 b is about 753 K (480 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 51.29 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on HIP 116454 b — one full orbit around HIP 116454 — lasts 9.10 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.079 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.22).
How Was HIP 116454 b Discovered?
HIP 116454 b was discovered in 2014 using the transit method, with observations from K2.
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is HIP 116454 b?
HIP 116454 b is 203.7 light-years (62.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1823. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,585,120 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. HIP 116454 b scores 0.25, ranking #3,055 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 116454
HIP 116454 b belongs to a system of 2 stars; it orbits HIP 116454.
HIP 116454
- Surface temperature
- 5,048 K (Sun: 5,772 K)
- Mass
- 0.80 M☉
- Radius
- 0.76 R☉
- Luminosity
- 0.3364 L☉
- Age
- 5.5 billion years (Sun: 4.6)
Planetary System
HIP 116454 b is the only planet known to orbit HIP 116454 so far.
HIP 116454 b — Complete Data
| Radius | 2.469 Earth radii (0.220 Jupiter radii) |
|---|---|
| Mass | 9.70 Earth masses (0.031 Jupiter masses) |
| Density | 3.53 g/cm³ (Earth: 5.51) |
| Orbital period | 9.10 days |
| Orbital distance | 0.079 AU |
| Eccentricity | 0.215 |
| Equilibrium temperature | 753 K (480 °C) |
| Stellar irradiation | 51.29× Earth |
| Earth Similarity Index | 0.25 |
| Distance from Earth | 203.7 light-years (62.4 parsecs) |
| Constellation | Pisces |
| Discovery method | Transit |
| Discovery facility | K2 |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2024-10-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 116454 b
Is HIP 116454 b habitable?
No — HIP 116454 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HIP 116454 b?
HIP 116454 b is about 204 light-years from Earth in the constellation Pisces. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,585,120 years to get there.
How big is HIP 116454 b compared to Earth?
HIP 116454 b has 2.47 times the radius of Earth and about 9.7 times its mass.
How long is a year on HIP 116454 b?
One orbit around HIP 116454 takes 9.1 Earth days — short enough that 40 of its years would fit into one Earth year.
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