TOI-1836 b
TOI-1836 b is a cold gas giant orbiting TOI-1836 in the constellation Draco. It lies about 625 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-1836 b?
TOI-1836 b has a radius of 8.00 times that of Earth, or 0.71 times the radius of Jupiter. Its mass is 38.5 times that of Earth, giving it a density of 0.41 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-1836 b in the Habitable Zone?
TOI-1836 b orbits inside the inner edge of the habitable zone of TOI-1836. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1836: 1.392–3.237 AU (conservative: 1.763–3.069 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-1836 b
The equilibrium temperature of TOI-1836 b is about 966 K (693 °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-1836 b — one full orbit around TOI-1836 — lasts 20.4 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.160 AU — closer to its star than Mercury is to the Sun.
How Was TOI-1836 b Discovered?
TOI-1836 b was discovered in 2024 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-1836 b?
TOI-1836 b is 625.1 light-years (191.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1401. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 11,001,760 years to make the journey.
The Host Star: TOI-1836
TOI-1836
- Surface temperature
- 6,380 K (Sun: 5,772 K)
- Mass
- 1.31 M☉
- Radius
- 1.58 R☉
- Luminosity
- 3.7000 L☉
- Age
- 6.6 billion years (Sun: 4.6)
The TOI-1836 Planetary System
TOI-1836 b is one of 2 known planets in the TOI-1836 system. Its siblings:
- TOI-1836 c (Super Earth)
TOI-1836 b — Complete Data
| Radius | 8.003 Earth radii (0.714 Jupiter radii) |
|---|---|
| Mass | 38.46 Earth masses (0.121 Jupiter masses) |
| Density | 0.41 g/cm³ (Earth: 5.51) |
| Orbital period | 20.38 days |
| Orbital distance | 0.160 AU |
| Equilibrium temperature | 966 K (693 °C) |
| Distance from Earth | 625.1 light-years (191.6 parsecs) |
| Constellation | Draco |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2025-03-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1836 b
Is TOI-1836 b habitable?
No — TOI-1836 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1836 b?
TOI-1836 b is about 625 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 11,001,760 years to get there.
How big is TOI-1836 b compared to Earth?
TOI-1836 b has 8.00 times the radius of Earth and about 38.5 times its mass.
How long is a year on TOI-1836 b?
One orbit around TOI-1836 takes 20.4 Earth days — short enough that 18 of its years would fit into one Earth year.
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