NGTS-34 b
NGTS-34 b is a sub-Neptune orbiting the F8 V star NGTS-34 in the constellation Vela. It lies about 393 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is NGTS-34 b?
NGTS-34 b has a radius of 3.65 times that of Earth. Its mass is 19.1 times that of Earth.
Is NGTS-34 b in the Habitable Zone?
NGTS-34 b orbits inside the inner edge of the habitable zone of NGTS-34. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of NGTS-34: 1.133–2.647 AU (conservative: 1.435–2.510 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 ›
Temperature on NGTS-34 b
The equilibrium temperature of NGTS-34 b is about 624 K (351 °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 NGTS-34 b — one full orbit around NGTS-34 — lasts 43.1 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.257 AU — closer to its star than Mercury is to the Sun.
How Was NGTS-34 b Discovered?
NGTS-34 b was discovered in 2025 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 NGTS-34 b?
NGTS-34 b is 392.9 light-years (120.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1634. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 6,915,040 years to make the journey.
The Host Star: NGTS-34
NGTS-34
- Spectral type
- F8 V
- Surface temperature
- 6,134 K (Sun: 5,772 K)
- Mass
- 1.27 M☉
- Radius
- 1.37 R☉
- Luminosity
- 2.3800 L☉
- Age
- 2.7 billion years (Sun: 4.6)
Planetary System
NGTS-34 b is the only planet known to orbit NGTS-34 so far.
NGTS-34 b — Complete Data
| Radius | 3.650 Earth radii (0.326 Jupiter radii) |
|---|---|
| Mass | 19.10 Earth masses (0.060 Jupiter masses) |
| Orbital period | 43.13 days |
| Orbital distance | 0.257 AU |
| Equilibrium temperature | 624 K (351 °C) |
| Distance from Earth | 392.9 light-years (120.5 parsecs) |
| Constellation | Vela |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2026-01-15. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About NGTS-34 b
Is NGTS-34 b habitable?
No — NGTS-34 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is NGTS-34 b?
NGTS-34 b is about 393 light-years from Earth in the constellation Vela. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 6,915,040 years to get there.
How big is NGTS-34 b compared to Earth?
NGTS-34 b has 3.65 times the radius of Earth and about 19.1 times its mass.
How long is a year on NGTS-34 b?
One orbit around NGTS-34 takes 43.1 Earth days.
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