GU Psc b
GU Psc b is a hot Jupiter orbiting the M3 star GU Psc in the constellation Pisces. It lies about 155 light-years from Earth and was discovered in 2014 using the imaging method.
How Big Is GU Psc b?
GU Psc b has a radius of 14.18 times that of Earth, or 1.26 times the radius of Jupiter. Its mass is 3,591 times that of Earth.
Is GU Psc b in the Habitable Zone?
The position of GU Psc b relative to the habitable zone of GU Psc cannot be precisely determined from the available orbital data.
Temperature on GU Psc b
The equilibrium temperature of GU Psc b is about 1,050 K (777 °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
GU Psc b orbits at an average distance of 2,000.000 AU.
How Was GU Psc b Discovered?
GU Psc b was discovered in 2014 using the imaging method, with observations from Gemini Observatory.
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 GU Psc b?
GU Psc b is 155.1 light-years (47.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1871. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,729,760 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. GU Psc b scores 0.06, ranking #5,086 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: GU Psc
GU Psc
- Spectral type
- M3
- Mass
- 0.33 M☉
- Age
- 0.1 billion years (Sun: 4.6)
Planetary System
GU Psc b is the only planet known to orbit GU Psc so far.
GU Psc b — Complete Data
| Radius | 14.179 Earth radii (1.265 Jupiter radii) |
|---|---|
| Mass | 3,591.30 Earth masses (11.300 Jupiter masses) |
| Orbital distance | 2,000.000 AU |
| Equilibrium temperature | 1,050 K (777 °C) |
| Earth Similarity Index | 0.06 |
| Distance from Earth | 155.1 light-years (47.6 parsecs) |
| Constellation | Pisces |
| Discovery method | Imaging |
| Discovery facility | Gemini Observatory |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About GU Psc b
Is GU Psc b habitable?
GU Psc b is not known to orbit within the habitable zone of GU Psc, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is GU Psc b?
GU Psc b is about 155 light-years from Earth in the constellation Pisces. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,729,760 years to get there.
How big is GU Psc b compared to Earth?
GU Psc b has 14.18 times the radius of Earth and about 3,591 times its mass.
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