HD 127195 b
HD 127195 b is a cold gas giant orbiting HD 127195 in the constellation Lupus. It lies about 276 light-years from Earth and was discovered in 2026 using the radial velocity method.
Is HD 127195 b in the Habitable Zone?
The position of HD 127195 b relative to the habitable zone of HD 127195 cannot be precisely determined from the available orbital data.
Habitable zone of HD 127195: 2.430–5.880 AU (conservative: 3.078–5.575 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 127195 b — one full orbit around HD 127195 — lasts 534.5 Earth days, longer than an Earth year. Its orbit is nearly circular (eccentricity 0.040).
How Was HD 127195 b Discovered?
HD 127195 b was discovered in 2026 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 127195 b?
HD 127195 b is 276.3 light-years (84.7 parsecs) from Earth. Light arriving here tonight left the planet around the year 1750. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,862,880 years to make the journey.
The Host Star: HD 127195
HD 127195
- Surface temperature
- 4,981 K (Sun: 5,772 K)
- Mass
- 1.34 M☉
- Radius
- 4.16 R☉
- Luminosity
- 9.6099 L☉
- Age
- 2.3 billion years (Sun: 4.6)
The HD 127195 Planetary System
HD 127195 b is one of 2 known planets in the HD 127195 system. Its siblings:
- HD 127195 c (Cold Gas Giant)
HD 127195 b — Complete Data
| Mass (best estimate) | 212.95 Earth masses |
|---|---|
| Orbital period | 534.50 days |
| Eccentricity | 0.040 |
| Distance from Earth | 276.3 light-years (84.7 parsecs) |
| Constellation | Lupus |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-07-02. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 127195 b
Is HD 127195 b habitable?
HD 127195 b is not known to orbit within the habitable zone of HD 127195, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 127195 b?
HD 127195 b is about 276 light-years from Earth in the constellation Lupus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,862,880 years to get there.
How long is a year on HD 127195 b?
One orbit around HD 127195 takes 534.5 Earth days.
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