HATS-34 b
HATS-34 b is a hot Jupiter orbiting HATS-34 in the constellation Tucana. It lies about 1,660 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is HATS-34 b?
HATS-34 b has a radius of 16.03 times that of Earth, or 1.43 times the radius of Jupiter. Its mass is 299 times that of Earth, giving it a density of 0.40 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is HATS-34 b in the Habitable Zone?
HATS-34 b orbits inside the inner edge of the habitable zone of HATS-34. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HATS-34: 0.653–1.558 AU (conservative: 0.828–1.477 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on HATS-34 b
The equilibrium temperature of HATS-34 b is about 1,445 K (1,172 °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 HATS-34 b — one full orbit around HATS-34 — lasts 2.11 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.032 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.11).
How Was HATS-34 b Discovered?
HATS-34 b was discovered in 2016 using the transit method, with observations from HATSouth.
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 HATS-34 b?
HATS-34 b is 1,659.6 light-years (508.8 parsecs) from Earth. Light arriving here tonight left the planet about 1,660 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 29,208,960 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. HATS-34 b scores 0.06, ranking #5,178 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HATS-34
HATS-34
- Surface temperature
- 5,380 K (Sun: 5,772 K)
- Mass
- 0.96 M☉
- Radius
- 0.98 R☉
- Luminosity
- 0.7240 L☉
- Age
- 7.7 billion years (Sun: 4.6)
Planetary System
HATS-34 b is the only planet known to orbit HATS-34 so far.
HATS-34 b — Complete Data
| Radius | 16.029 Earth radii (1.430 Jupiter radii) |
|---|---|
| Mass | 299.08 Earth masses (0.941 Jupiter masses) |
| Density | 0.40 g/cm³ (Earth: 5.51) |
| Orbital period | 2.11 days |
| Orbital distance | 0.032 AU |
| Eccentricity | 0.108 |
| Equilibrium temperature | 1,445 K (1,172 °C) |
| Earth Similarity Index | 0.06 |
| Distance from Earth | 1,659.6 light-years (508.8 parsecs) |
| Constellation | Tucana |
| Discovery method | Transit |
| Discovery facility | HATSouth |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-11-30. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HATS-34 b
Is HATS-34 b habitable?
No — HATS-34 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HATS-34 b?
HATS-34 b is about 1,660 light-years from Earth in the constellation Tucana. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 29,208,960 years to get there.
How big is HATS-34 b compared to Earth?
HATS-34 b has 16.03 times the radius of Earth and about 299 times its mass.
How long is a year on HATS-34 b?
One orbit around HATS-34 takes 2.1 Earth days — short enough that 173 of its years would fit into one Earth year.
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