DMPP-8 b
DMPP-8 b is a cold gas giant orbiting DMPP-8 in the constellation Octans. It lies about 248 light-years from Earth and was discovered in 2026 using the radial velocity method.
Is DMPP-8 b in the Habitable Zone?
The position of DMPP-8 b relative to the habitable zone of DMPP-8 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on DMPP-8 b — one full orbit around DMPP-8 — lasts 62.9 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.310 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.28).
How Was DMPP-8 b Discovered?
DMPP-8 b was discovered in 2026 using the radial velocity method, with observations from Multiple Observatories.
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 DMPP-8 b?
DMPP-8 b is 248.3 light-years (76.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1778. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 4,370,080 years to make the journey.
The Host Star: DMPP-8
DMPP-8
- Mass
- 0.99 M☉
- Radius
- 1.24 R☉
Planetary System
DMPP-8 b is the only planet known to orbit DMPP-8 so far.
DMPP-8 b — Complete Data
| Mass (best estimate) | 81.09 Earth masses |
|---|---|
| Orbital period | 62.92 days |
| Orbital distance | 0.310 AU |
| Eccentricity | 0.275 |
| Distance from Earth | 248.3 light-years (76.1 parsecs) |
| Constellation | Octans |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-03-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About DMPP-8 b
Is DMPP-8 b habitable?
DMPP-8 b is not known to orbit within the habitable zone of DMPP-8, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is DMPP-8 b?
DMPP-8 b is about 248 light-years from Earth in the constellation Octans. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 4,370,080 years to get there.
How long is a year on DMPP-8 b?
One orbit around DMPP-8 takes 62.9 Earth days.
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