TOI-1444 b
TOI-1444 b is a lava world orbiting TOI-1444 in the constellation Draco. It lies about 409 light-years from Earth and was discovered in 2021 using the transit method.
How Big Is TOI-1444 b?
TOI-1444 b has a radius of 1.42 times that of Earth. Its mass is 3.6 times that of Earth, giving it a density of 6.84 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-1444 b in the Habitable Zone?
TOI-1444 b orbits inside the inner edge of the habitable zone of TOI-1444. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1444: 0.624–1.485 AU (conservative: 0.791–1.408 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-1444 b
The equilibrium temperature of TOI-1444 b is about 2,130 K (1,857 °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 TOI-1444 b — one full orbit around TOI-1444 — lasts just 11.3 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.012 AU — closer to its star than Mercury is to the Sun.
How Was TOI-1444 b Discovered?
TOI-1444 b was discovered in 2021 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 TOI-1444 b?
TOI-1444 b is 409.2 light-years (125.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1617. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,201,920 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. TOI-1444 b scores 0.28, ranking #2,129 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-1444
TOI-1444
- Surface temperature
- 5,460 K (Sun: 5,772 K)
- Mass
- 0.95 M☉
- Radius
- 0.91 R☉
- Luminosity
- 0.6670 L☉
- Age
- 3.8 billion years (Sun: 4.6)
Planetary System
TOI-1444 b is the only planet known to orbit TOI-1444 so far.
TOI-1444 b — Complete Data
| Radius | 1.418 Earth radii (0.126 Jupiter radii) |
|---|---|
| Mass | 3.58 Earth masses (0.011 Jupiter masses) |
| Density | 6.84 g/cm³ (Earth: 5.51) |
| Orbital period | 0.47 days |
| Orbital distance | 0.012 AU |
| Equilibrium temperature | 2,130 K (1,857 °C) |
| Earth Similarity Index | 0.28 |
| Distance from Earth | 409.2 light-years (125.5 parsecs) |
| Constellation | Draco |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2024-07-23. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1444 b
Is TOI-1444 b habitable?
No — TOI-1444 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1444 b?
TOI-1444 b is about 409 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,201,920 years to get there.
How big is TOI-1444 b compared to Earth?
TOI-1444 b has 1.42 times the radius of Earth and about 3.6 times its mass.
How long is a year on TOI-1444 b?
One orbit around TOI-1444 takes 0.5 Earth days — short enough that 777 of its years would fit into one Earth year.
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