PSR B1257+12 is 1,957 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around it; the first was found in 1992 by pulsar timing (Arecibo Observatory).
Fly there in 3DPSR B1257+12 b was found by timing the pulses of a dead star: the planet’s pull shifts their arrival by fractions of a millisecond.
| Mass | 1.4 solar masses |
| Age | about 3 billion years |
| Distance from the Sun | 1956.9 light-years (600.0 parsecs) |
| Position (J2000) | RA 195.0149°, Dec 12.6824° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| PSR B1257+12 b | 25.3 days | 0.190 AU | 0.338 R⊕ estimated | 0.02 M⊕ | Pulsar Timing, 1994 |
| PSR B1257+12 c | 66.5 days | 0.360 AU | 1.91 R⊕ estimated | 4.3 M⊕ | Pulsar Timing, 1992 |
| PSR B1257+12 d | 98.2 days | 0.460 AU | 1.8 R⊕ estimated | 3.9 M⊕ | Pulsar Timing, 1992 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.