HAT-P-16 b
HAT-P-16 b is a hot Jupiter orbiting the F8 star HAT-P-16 in the constellation Andromeda. It lies about 739 light-years from Earth and was discovered in 2010 using the transit method.
How Big Is HAT-P-16 b?
HAT-P-16 b has a radius of 14.68 times that of Earth, or 1.31 times the radius of Jupiter.
Is HAT-P-16 b in the Habitable Zone?
The position of HAT-P-16 b relative to the habitable zone of HAT-P-16 cannot be precisely determined from the available orbital data.
Temperature on HAT-P-16 b
The equilibrium temperature of HAT-P-16 b is about 1,566 K (1,293 °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.
How Was HAT-P-16 b Discovered?
HAT-P-16 b was discovered in 2010 using the transit method, with observations from HATNet.
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-16 b?
HAT-P-16 b is 739.2 light-years (226.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1287. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 13,009,920 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. HAT-P-16 b scores 0.06, ranking #5,090 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HAT-P-16
HAT-P-16 b belongs to a system of 3 stars; it orbits HAT-P-16.
HAT-P-16
- Spectral type
- F8
Planetary System
HAT-P-16 b is the only planet known to orbit HAT-P-16 so far.
HAT-P-16 b — Complete Data
| Radius | 14.684 Earth radii (1.310 Jupiter radii) |
|---|---|
| Density | 2.48 g/cm³ (Earth: 5.51) |
| Equilibrium temperature | 1,566 K (1,293 °C) |
| Earth Similarity Index | 0.06 |
| Distance from Earth | 739.2 light-years (226.6 parsecs) |
| Constellation | Andromeda |
| Discovery method | Transit |
| Discovery facility | HATNet |
| Discovery year | 2010 |
Data: NASA Exoplanet Archive, last updated 2025-12-18. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HAT-P-16 b
Is HAT-P-16 b habitable?
HAT-P-16 b is not known to orbit within the habitable zone of HAT-P-16, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is HAT-P-16 b?
HAT-P-16 b is about 739 light-years from Earth in the constellation Andromeda. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 13,009,920 years to get there.
How big is HAT-P-16 b compared to Earth?
HAT-P-16 b has 14.68 times the radius of Earth.
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