HIP 94235 b
HIP 94235 b is a super-Earth orbiting the G V star HIP 94235 in the constellation Pavo. It lies about 191 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is HIP 94235 b?
HIP 94235 b has a radius of 3.00 times that of Earth. Its mass is 379 times that of Earth.
Is HIP 94235 b in the Habitable Zone?
HIP 94235 b orbits inside the inner edge of the habitable zone of HIP 94235. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HIP 94235: 0.860–2.016 AU (conservative: 1.090–1.911 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on HIP 94235 b
The equilibrium temperature of HIP 94235 b is about 1,060 K (787 °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.
Orbit and Year Length
A year on HIP 94235 b — one full orbit around HIP 94235 — lasts 7.71 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 highly elliptical (eccentricity 0.32), swinging dramatically closer to and farther from its star.
How Was HIP 94235 b Discovered?
HIP 94235 b was discovered in 2022 using the transit method, with observations from Transiting Exoplanet Survey Satellite (TESS).
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 94235 b?
HIP 94235 b is 190.8 light-years (58.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1836. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,358,080 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 94235 b scores 0.21, ranking #3,723 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 94235
HIP 94235 b belongs to a system of 2 stars; it orbits HIP 94235.
HIP 94235
- Spectral type
- G V
- Surface temperature
- 5,991 K (Sun: 5,772 K)
- Mass
- 1.09 M☉
- Radius
- 1.08 R☉
- Age
- 0.1 billion years (Sun: 4.6)
Planetary System
HIP 94235 b is the only planet known to orbit HIP 94235 so far.
HIP 94235 b — Complete Data
| Radius | 3.000 Earth radii (0.268 Jupiter radii) |
|---|---|
| Mass | 379.00 Earth masses (1.192 Jupiter masses) |
| Orbital period | 7.71 days |
| Orbital distance | 0.079 AU |
| Eccentricity | 0.320 |
| Equilibrium temperature | 1,060 K (787 °C) |
| Earth Similarity Index | 0.21 |
| Distance from Earth | 190.8 light-years (58.5 parsecs) |
| Constellation | Pavo |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-05-09. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 94235 b
Is HIP 94235 b habitable?
No — HIP 94235 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HIP 94235 b?
HIP 94235 b is about 191 light-years from Earth in the constellation Pavo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,358,080 years to get there.
How big is HIP 94235 b compared to Earth?
HIP 94235 b has 3.00 times the radius of Earth and about 379 times its mass.
How long is a year on HIP 94235 b?
One orbit around HIP 94235 takes 7.7 Earth days — short enough that 47 of its years would fit into one Earth year.
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