TOI-1338 c
TOI-1338 c is a cold gas giant orbiting TOI-1338 A in the constellation Pictor. It lies about 1,301 light-years from Earth and was discovered in 2023 using the radial velocity method.
Is TOI-1338 c in the Habitable Zone?
The position of TOI-1338 c relative to the habitable zone of TOI-1338 A cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on TOI-1338 c — one full orbit around TOI-1338 A — lasts 215.8 Earth days, between the years of Mercury (88 days) and Earth (365 days). Its orbit is nearly circular (eccentricity 0.037).
How Was TOI-1338 c Discovered?
TOI-1338 c was discovered in 2023 using the radial velocity method, with observations from Multiple Observatories.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is TOI-1338 c?
TOI-1338 c is 1,301.4 light-years (399.0 parsecs) from Earth. Light arriving here tonight left the planet about 1,301 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 22,904,640 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-1338 c scores 0.31, ranking #1,169 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-1338 A
TOI-1338 c is a circumbinary planet — it orbits around two stars at once, like Tatooine in Star Wars.
TOI-1338 A
- Mass
- 1.09 M☉
- Radius
- 1.31 R☉
The TOI-1338 A Planetary System
TOI-1338 c is one of 2 known planets in the TOI-1338 A system. Its siblings:
- TOI-1338 b (Cold Gas Giant)
TOI-1338 c — Complete Data
| Mass | 75.40 Earth masses (0.237 Jupiter masses) |
|---|---|
| Orbital period | 215.79 days |
| Eccentricity | 0.037 |
| Earth Similarity Index | 0.31 |
| Distance from Earth | 1,301.4 light-years (399.0 parsecs) |
| Constellation | Pictor |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2024-08-07. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1338 c
Is TOI-1338 c habitable?
TOI-1338 c is not known to orbit within the habitable zone of TOI-1338 A, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is TOI-1338 c?
TOI-1338 c is about 1,301 light-years from Earth in the constellation Pictor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 22,904,640 years to get there.
How long is a year on TOI-1338 c?
One orbit around TOI-1338 A takes 215.8 Earth days.
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