HATS-41 b
HATS-41 b is a hot Jupiter orbiting HATS-41 in the constellation Canis Major. It lies about 2,406 light-years from Earth and was discovered in 2018 using the transit method.
How Big Is HATS-41 b?
HATS-41 b has a radius of 14.91 times that of Earth, or 1.33 times the radius of Jupiter. Its mass is 3,083 times that of Earth, giving it a density of 5.10 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is HATS-41 b in the Habitable Zone?
HATS-41 b orbits inside the inner edge of the habitable zone of HATS-41. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HATS-41: 1.531–3.558 AU (conservative: 1.939–3.373 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on HATS-41 b
The equilibrium temperature of HATS-41 b is about 1,710 K (1,437 °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-41 b — one full orbit around HATS-41 — lasts 4.19 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.058 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.38), swinging dramatically closer to and farther from its star.
How Was HATS-41 b Discovered?
HATS-41 b was discovered in 2018 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-41 b?
HATS-41 b is 2,405.9 light-years (737.7 parsecs) from Earth. Light arriving here tonight left the planet about 2,406 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 42,343,840 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-41 b scores 0.06, ranking #5,127 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HATS-41
HATS-41
- Surface temperature
- 6,424 K (Sun: 5,772 K)
- Mass
- 1.50 M☉
- Radius
- 1.71 R☉
- Luminosity
- 4.5000 L☉
- Age
- 1.3 billion years (Sun: 4.6)
Planetary System
HATS-41 b is the only planet known to orbit HATS-41 so far.
HATS-41 b — Complete Data
| Radius | 14.908 Earth radii (1.330 Jupiter radii) |
|---|---|
| Mass | 3,082.95 Earth masses (9.700 Jupiter masses) |
| Density | 5.10 g/cm³ (Earth: 5.51) |
| Orbital period | 4.19 days |
| Orbital distance | 0.058 AU |
| Eccentricity | 0.380 |
| Equilibrium temperature | 1,710 K (1,437 °C) |
| Earth Similarity Index | 0.06 |
| Distance from Earth | 2,405.9 light-years (737.7 parsecs) |
| Constellation | Canis Major |
| Discovery method | Transit |
| Discovery facility | HATSouth |
| Discovery year | 2018 |
Data: NASA Exoplanet Archive, last updated 2018-04-09. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HATS-41 b
Is HATS-41 b habitable?
No — HATS-41 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HATS-41 b?
HATS-41 b is about 2,406 light-years from Earth in the constellation Canis Major. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 42,343,840 years to get there.
How big is HATS-41 b compared to Earth?
HATS-41 b has 14.91 times the radius of Earth and about 3,083 times its mass.
How long is a year on HATS-41 b?
One orbit around HATS-41 takes 4.2 Earth days — short enough that 87 of its years would fit into one Earth year.
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