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PSR B1257+12 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/PSR B1257+12 b

Confirmed exoplanet · Terrestrial

PSR B1257+12 b

Orbiting PSR B1257+12

Discovered in 1994 using Pulsar Timing. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic terrestrial catalog artwork; not a direct image of PSR B1257+12 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 1,994
Method: Pulsar Timing
Radius: 0.338 R⊕
Mass: 0.02 M⊕
Orbit: 25.262 days
Distance: 600 pc

Planet profile

Orbit and physical properties

Orbital period: 25.262 days
Semi-major axis: 0.19 AU
Eccentricity: 0
Radius: 0.338 Earth radii
Mass: 0.02 Earth masses
Mass provenance: Mass
Density: 2.85 g/cm³
Equilibrium temperature: Not reported by the NASA Exoplanet Archive
Insolation: Not reported by the NASA Exoplanet Archive

Host system

Star and system properties

Host star: PSR B1257+12
Stars in system: 1
Known planets in system: 3
Spectral type: Not reported by the NASA Exoplanet Archive
Stellar temperature: Not reported by the NASA Exoplanet Archive
Stellar radius: Not reported by the NASA Exoplanet Archive
Stellar mass: 1.4 M☉
Stellar metallicity: Not reported by the NASA Exoplanet Archive
Stellar age: 3 Gyr
Distance: 600 parsecs
Right ascension: 13h00m03.58s
Declination: +12d40m56.5s

Discovery

Detection and provenance

Discovery method: Pulsar Timing
Discovery year: 1,994
Publication date: 1994-04
Discovery locale: Ground
Facility: Arecibo Observatory
Telescope: 305 m Arecibo Radio Telescope
Instrument: Arecibo Radio Reciever
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from PSR B1257+12 b.

Generic terrestrial catalog artwork; not a direct image of PSR B1257+12 b — Apex Andromeda catalog artwork