PSR B1257+12 d
A confirmed exoplanet orbiting PSR B1257+12.
Compared with Earth
- Mass
- About 3.9 times Earth's mass.
- Year
- A year here lasts about 98 Earth days.
Planet
- Radius
- Unknown
- Mass
- 3.9 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 98.21 days
- Average distance from its star
- 0.46 AU
Star
- Host star
- PSR B1257+12
- Spectral class
- Unknown
- Surface temperature
- Unknown
- Radius
- Unknown
- Mass
- 1.4 × Sun
- Age
- 3 billion years
System
- Distance from Earth
- 1,957 light-years (600 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 1992
- Method
- Pulsar Timing
- Facility
- Arecibo Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.