GJ 3090 c
GJ 3090 c is a Neptune-like planet orbiting the M2 V star GJ 3090 in the constellation Phoenix. It lies about 73 light-years from Earth and was discovered in 2026 using the radial velocity method.
Is GJ 3090 c in the Habitable Zone?
GJ 3090 c orbits inside the inner edge of the habitable zone of GJ 3090. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of GJ 3090: 0.174–0.447 AU (conservative: 0.220–0.424 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 GJ 3090 c
The equilibrium temperature of GJ 3090 c is about 407 K (134 °C) — hotter than anywhere on Earth. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 4.58 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on GJ 3090 c — one full orbit around GJ 3090 — lasts 15.9 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.100 AU — closer to its star than Mercury is to the Sun.
How Was GJ 3090 c Discovered?
GJ 3090 c was discovered in 2026 using the radial velocity method, with observations from Multiple Facilities.
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 GJ 3090 c?
GJ 3090 c is 73.3 light-years (22.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1953. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 1,290,080 years to make the journey.
The Host Star: GJ 3090
GJ 3090
- Spectral type
- M2 V
- Surface temperature
- 3,707 K (Sun: 5,772 K)
- Mass
- 0.52 M☉
- Radius
- 0.52 R☉
- Luminosity
- 0.0455 L☉
The GJ 3090 Planetary System
GJ 3090 c is one of 2 known planets in the GJ 3090 system. Its siblings:
- GJ 3090 b (Mini Neptune)
GJ 3090 c — Complete Data
| Mass (best estimate) | 10.00 Earth masses |
|---|---|
| Orbital period | 15.94 days |
| Orbital distance | 0.100 AU |
| Equilibrium temperature | 407 K (134 °C) |
| Stellar irradiation | 4.58× Earth |
| Distance from Earth | 73.3 light-years (22.5 parsecs) |
| Constellation | Phoenix |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Facilities |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-02-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About GJ 3090 c
Is GJ 3090 c habitable?
No — GJ 3090 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is GJ 3090 c?
GJ 3090 c is about 73 light-years from Earth in the constellation Phoenix. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 1,290,080 years to get there.
How long is a year on GJ 3090 c?
One orbit around GJ 3090 takes 15.9 Earth days — short enough that 23 of its years would fit into one Earth year.
Explore GJ 3090 c in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
