HAT-P-47 b
HAT-P-47 b is a hot Jupiter orbiting the F star HAT-P-47 in the constellation Aries. It lies about 920 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is HAT-P-47 b?
HAT-P-47 b has a radius of 14.72 times that of Earth, or 1.31 times the radius of Jupiter. Its mass is 65.5 times that of Earth.
Is HAT-P-47 b in the Habitable Zone?
The position of HAT-P-47 b relative to the habitable zone of HAT-P-47 cannot be precisely determined from the available orbital data.
Habitable zone of HAT-P-47: 1.448–3.352 AU (conservative: 1.834–3.178 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Temperature on HAT-P-47 b
The equilibrium temperature of HAT-P-47 b is about 1,605 K (1,332 °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 HAT-P-47 b — one full orbit around HAT-P-47 — lasts 4.73 Earth days, shorter than Mercury's 88-day year.
How Was HAT-P-47 b Discovered?
HAT-P-47 b was discovered in 2026 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 HAT-P-47 b?
HAT-P-47 b is 920.1 light-years (282.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1106. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 16,193,760 years to make the journey.
The Host Star: HAT-P-47
HAT-P-47
- Spectral type
- F
- Surface temperature
- 6,703 K (Sun: 5,772 K)
- Mass
- 1.39 M☉
- Radius
- 1.52 R☉
- Age
- 1.5 billion years (Sun: 4.6)
Planetary System
HAT-P-47 b is the only planet known to orbit HAT-P-47 so far.
HAT-P-47 b — Complete Data
| Radius | 14.717 Earth radii (1.313 Jupiter radii) |
|---|---|
| Mass | 65.47 Earth masses (0.206 Jupiter masses) |
| Orbital period | 4.73 days |
| Equilibrium temperature | 1,605 K (1,332 °C) |
| Distance from Earth | 920.1 light-years (282.1 parsecs) |
| Constellation | Aries |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-07-30. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HAT-P-47 b
Is HAT-P-47 b habitable?
HAT-P-47 b is not known to orbit within the habitable zone of HAT-P-47, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is HAT-P-47 b?
HAT-P-47 b is about 920 light-years from Earth in the constellation Aries. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 16,193,760 years to get there.
How big is HAT-P-47 b compared to Earth?
HAT-P-47 b has 14.72 times the radius of Earth and about 65.5 times its mass.
How long is a year on HAT-P-47 b?
One orbit around HAT-P-47 takes 4.7 Earth days — short enough that 77 of its years would fit into one Earth year.
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