HD 94890 b
HD 94890 b is a cold gas giant orbiting the K0 III star HD 94890 in the constellation Antlia. It lies about 201 light-years from Earth and was discovered in 2025 using the radial velocity method.
Is HD 94890 b in the Habitable Zone?
HD 94890 b orbits inside the inner edge of the habitable zone of HD 94890. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 94890: 6.002–14.591 AU (conservative: 7.603–13.834 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Orbit and Year Length
A year on HD 94890 b — one full orbit around HD 94890 — lasts 824.6 Earth days, longer than an Earth year. It orbits at an average distance of 2.070 AU. Its orbit is mildly elliptical (eccentricity 0.22).
How Was HD 94890 b Discovered?
HD 94890 b was discovered in 2025 using the radial velocity method, with observations from La Silla Observatory.
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 HD 94890 b?
HD 94890 b is 201.2 light-years (61.7 parsecs) from Earth. Light arriving here tonight left the planet around the year 1825. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,541,120 years to make the journey.
The Host Star: HD 94890
HD 94890
- Spectral type
- K0 III
- Surface temperature
- 4,867 K (Sun: 5,772 K)
- Mass
- 1.74 M☉
- Radius
- 10.71 R☉
- Luminosity
- 58.0096 L☉
The HD 94890 Planetary System
HD 94890 b is one of 2 known planets in the HD 94890 system. Its siblings:
- HD 94890 c (Cold Gas Giant)
HD 94890 b — Complete Data
| Mass (best estimate) | 676.97 Earth masses |
|---|---|
| Orbital period | 824.61 days |
| Orbital distance | 2.070 AU |
| Eccentricity | 0.220 |
| Distance from Earth | 201.2 light-years (61.7 parsecs) |
| Constellation | Antlia |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-05-27. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 94890 b
Is HD 94890 b habitable?
No — HD 94890 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 94890 b?
HD 94890 b is about 201 light-years from Earth in the constellation Antlia. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,541,120 years to get there.
How long is a year on HD 94890 b?
One orbit around HD 94890 takes 824.6 Earth days.
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