WASP-190 b
WASP-190 b is a hot Jupiter orbiting the F6 IV-V star WASP-190 in the constellation Phoenix. It lies about 1,769 light-years from Earth and was discovered in 2019 using the transit method.
How Big Is WASP-190 b?
WASP-190 b has a radius of 12.89 times that of Earth, or 1.15 times the radius of Jupiter. Its mass is 318 times that of Earth.
Is WASP-190 b in the Habitable Zone?
WASP-190 b orbits inside the inner edge of the habitable zone of WASP-190. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of WASP-190: 1.419–3.298 AU (conservative: 1.797–3.127 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on WASP-190 b
The equilibrium temperature of WASP-190 b is about 1,500 K (1,227 °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 WASP-190 b — one full orbit around WASP-190 — lasts 5.37 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.066 AU — closer to its star than Mercury is to the Sun.
How Was WASP-190 b Discovered?
WASP-190 b was discovered in 2019 using the transit method, with observations from WASP-South.
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 WASP-190 b?
WASP-190 b is 1,768.6 light-years (542.3 parsecs) from Earth. Light arriving here tonight left the planet about 1,769 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 31,127,360 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. WASP-190 b scores 0.07, ranking #4,939 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: WASP-190
WASP-190
- Spectral type
- F6 IV-V
- Surface temperature
- 6,400 K (Sun: 5,772 K)
- Mass
- 1.35 M☉
- Radius
- 1.60 R☉
Planetary System
WASP-190 b is the only planet known to orbit WASP-190 so far.
WASP-190 b — Complete Data
| Radius | 12.890 Earth radii (1.150 Jupiter radii) |
|---|---|
| Mass | 317.83 Earth masses (1.000 Jupiter masses) |
| Orbital period | 5.37 days |
| Orbital distance | 0.066 AU |
| Equilibrium temperature | 1,500 K (1,227 °C) |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 1,768.6 light-years (542.3 parsecs) |
| Constellation | Phoenix |
| Discovery method | Transit |
| Discovery facility | WASP-South |
| Discovery year | 2019 |
Data: NASA Exoplanet Archive, last updated 2019-03-01. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About WASP-190 b
Is WASP-190 b habitable?
No — WASP-190 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is WASP-190 b?
WASP-190 b is about 1,769 light-years from Earth in the constellation Phoenix. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 31,127,360 years to get there.
How big is WASP-190 b compared to Earth?
WASP-190 b has 12.89 times the radius of Earth and about 318 times its mass.
How long is a year on WASP-190 b?
One orbit around WASP-190 takes 5.4 Earth days — short enough that 68 of its years would fit into one Earth year.
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