TWA 7 b
TWA 7 b is a cold gas giant orbiting TWA 7 in the constellation Antlia. It lies about 111 light-years from Earth and was discovered in 2025 using the imaging method.
Is TWA 7 b in the Habitable Zone?
The position of TWA 7 b relative to the habitable zone of TWA 7 cannot be precisely determined from the available orbital data.
Temperature on TWA 7 b
The equilibrium temperature of TWA 7 b is about 316 K (43 °C) — in a range broadly comparable to Earth, whose equilibrium temperature is 255 K. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C.
Orbit and Year Length
TWA 7 b orbits at an average distance of 52.000 AU.
How Was TWA 7 b Discovered?
TWA 7 b was discovered in 2025 using the imaging method, with observations from James Webb Space Telescope (JWST).
Direct imaging captures actual pictures of a planet by blocking out the overwhelming glare of its host star. It works best for young, hot, massive planets on wide orbits.
How Far Away Is TWA 7 b?
TWA 7 b is 110.9 light-years (34.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1916. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,951,840 years to make the journey.
The Host Star: TWA 7
TWA 7
- Mass
- 0.46 M☉
- Age
- 0.0 billion years (Sun: 4.6)
Planetary System
TWA 7 b is the only planet known to orbit TWA 7 so far.
TWA 7 b — Complete Data
| Mass | 108.06 Earth masses (0.340 Jupiter masses) |
|---|---|
| Orbital distance | 52.000 AU |
| Equilibrium temperature | 316 K (43 °C) |
| Distance from Earth | 110.9 light-years (34.0 parsecs) |
| Constellation | Antlia |
| Discovery method | Imaging |
| Discovery facility | James Webb Space Telescope (JWST) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-07-11. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TWA 7 b
Is TWA 7 b habitable?
TWA 7 b is not known to orbit within the habitable zone of TWA 7, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is TWA 7 b?
TWA 7 b is about 111 light-years from Earth in the constellation Antlia. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,951,840 years to get there.
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