Exoplanet CatalogExoplanet PSR B1257+12 d
Radius1.80 R⊕Earth = 1
Mass3.9 M⊕Earth = 1
Orbital period98.21 d
Equilibrium temp.–
Distance1,956.9 ly
Discovered1992Pulsar Timing
Size compared (radius, Earth = 1)
1.00
1.80
3.88
11.21
Where it sits among all planets (percentile)
24%
22%
83%
65%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of PSR B1257+12 (3)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| PSR B1257+12 b | 25.26 | 0.34 | 0.0 | – | 1994 |
| PSR B1257+12 c | 66.54 | 1.91 | 4.3 | – | 1992 |
| PSR B1257+12 d | 98.21 | 1.80 | 3.9 | – | 1992 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| PSR B1257+12 | – | – | – | 1.40 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.