TOI-4409 b
TOI-4409 b is a cold gas giant orbiting the K star TOI-4409 in the constellation Pictor. It lies about 585 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4409 b?
TOI-4409 b has a radius of 7.44 times that of Earth, or 0.66 times the radius of Jupiter. Its mass is 14.9 times that of Earth, giving it a density of 0.20 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-4409 b in the Habitable Zone?
The position of TOI-4409 b relative to the habitable zone of TOI-4409 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-4409: 0.408–0.989 AU (conservative: 0.517–0.938 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on TOI-4409 b — one full orbit around TOI-4409 — lasts 92.5 Earth days, between the years of Mercury (88 days) and Earth (365 days). Its orbit is nearly circular (eccentricity 0.036).
How Was TOI-4409 b Discovered?
TOI-4409 b was discovered in 2026 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-4409 b?
TOI-4409 b is 585.2 light-years (179.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1441. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,299,520 years to make the journey.
The Host Star: TOI-4409
TOI-4409
- Spectral type
- K
- Surface temperature
- 4,928 K (Sun: 5,772 K)
- Mass
- 0.76 M☉
- Radius
- 0.72 R☉
- Luminosity
- 0.2693 L☉
- Age
- 7.0 billion years (Sun: 4.6)
Planetary System
TOI-4409 b is the only planet known to orbit TOI-4409 so far.
TOI-4409 b — Complete Data
| Radius | 7.440 Earth radii (0.664 Jupiter radii) |
|---|---|
| Mass | 14.94 Earth masses (0.047 Jupiter masses) |
| Density | 0.20 g/cm³ (Earth: 5.51) |
| Orbital period | 92.49 days |
| Eccentricity | 0.036 |
| Distance from Earth | 585.2 light-years (179.4 parsecs) |
| Constellation | Pictor |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-09-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4409 b
Is TOI-4409 b habitable?
TOI-4409 b is not known to orbit within the habitable zone of TOI-4409, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is TOI-4409 b?
TOI-4409 b is about 585 light-years from Earth in the constellation Pictor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,299,520 years to get there.
How big is TOI-4409 b compared to Earth?
TOI-4409 b has 7.44 times the radius of Earth and about 14.9 times its mass.
How long is a year on TOI-4409 b?
One orbit around TOI-4409 takes 92.5 Earth days.
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