HIP 21152 b
HIP 21152 b is a exoplanet orbiting the F5 V star HIP 21152 in the constellation Taurus. It lies about 142 light-years from Earth and was discovered in 2022 using the imaging method.
Is HIP 21152 b in the Habitable Zone?
The position of HIP 21152 b relative to the habitable zone of HIP 21152 cannot be precisely determined from the available orbital data.
Temperature on HIP 21152 b
The equilibrium temperature of HIP 21152 b is about 1,300 K (1,027 °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 21152 b — one full orbit around HIP 21152 — lasts 22,000.0 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 17.000 AU. Its orbit is highly elliptical (eccentricity 0.36), swinging dramatically closer to and farther from its star.
How Was HIP 21152 b Discovered?
HIP 21152 b was discovered in 2022 using the imaging method, with observations from Multiple Observatories.
Direct imaging captures actual pictures of a planet by blocking out the overwhelming glare of its host star. It works best for young, hot, massive planets on wide orbits.
How Far Away Is HIP 21152 b?
HIP 21152 b is 141.6 light-years (43.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1885. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,492,160 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 21152 b scores 0.09, ranking #4,513 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HIP 21152
HIP 21152 b belongs to a system of 2 stars; it orbits HIP 21152.
HIP 21152
- Spectral type
- F5 V
- Surface temperature
- 6,655 K (Sun: 5,772 K)
- Mass
- 1.40 M☉
- Age
- 0.7 billion years (Sun: 4.6)
Planetary System
HIP 21152 b is the only planet known to orbit HIP 21152 so far.
HIP 21152 b — Complete Data
| Mass | 7,627.88 Earth masses (24.000 Jupiter masses) |
|---|---|
| Orbital period | 22,000.00 days |
| Orbital distance | 17.000 AU |
| Eccentricity | 0.360 |
| Equilibrium temperature | 1,300 K (1,027 °C) |
| Earth Similarity Index | 0.09 |
| Distance from Earth | 141.6 light-years (43.4 parsecs) |
| Constellation | Taurus |
| Discovery method | Imaging |
| Discovery facility | Multiple Observatories |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-12-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HIP 21152 b
Is HIP 21152 b habitable?
HIP 21152 b is not known to orbit within the habitable zone of HIP 21152.
How far away is HIP 21152 b?
HIP 21152 b is about 142 light-years from Earth in the constellation Taurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,492,160 years to get there.
How long is a year on HIP 21152 b?
One orbit around HIP 21152 takes 22,000.0 Earth days.
Explore HIP 21152 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
