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Exoplanet PSR B1257+12 b
Exoplanet PSR B1257+12 b orbits star PSR B1257+12 that lies 2313 light years away from the Sun.
It weighs about 0.02 Earth masses and orbits its star closer than Earth orbits Sun.
Sun distance
2313 light years
2313 light years
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PSR B1257+12 b
Exoplanet
Star: PSR B1257+12
Distance from the star: 0.19 AU
Orbit around star: 25.262 days
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Orbital period
Orbital period of exoplanet PSR B1257+12 b around its star is 25.262 days.
The orbital period of an exoplanet is the time it takes to complete one full orbit around its star, usually measured in days. Most of the exoplanets discovered so far have orbital periods of less than one year...
More about Orbital period in StellarGuide
Basic characteristic
Mass: 0.02 M Earth
Exoplanet mass
Exoplanet PSR B1257+12 b has 0.02 Earth masses, or 0.36 times the mass of Mercury.
The mass of an exoplanet is one of the most important characteristics for understanding what kind of world it is — whether it’s small and rocky like Earth or large and gaseous like Jupiter. Mass provides key information about the planet’s composition, gravity, and formation history...
More about Exoplanet mass in StellarGuide
Temperature: 266 K | -7.15 °C
Year of discovery: 1994 (timing)
Other designations of this exoplanet
PSR 1257+12 b, PSR J1300+1240 b, Lich b, PSR 1300+1240 b
PSR 1257+12 b, PSR J1300+1240 b, Lich b, PSR 1300+1240 b
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PSR B1257+12 system structure
Exoplanet PSR B1257+12 b orbits star PSR B1257+12, which has bigger mass than Sun. It is one of 3 known exoplanets orbiting this star.
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PSR B1257+12 | ||||||||
| PSR B1257+12 b | 0.19 AU | 0 M⊕ | 25.3 days | ||||||
| PSR B1257+12 c | 0.36 AU | 4.3 M⊕ | 66.5 days | ||||||
| PSR B1257+12 d | 0.46 AU | 3.9 M⊕ | 1.5 R⊕ | 98.2 days | |||||
Comparison
When comparing to the Solar system planets, PSR B1257+12 b has 36 % of mass of Mercury and it orbits its star closer than Mercury orbits the Sun.
| Mercury | Venus | Earth | Mars | Jupiter | Saturn | Uranus | Neptune | ||
|---|---|---|---|---|---|---|---|---|---|
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Mass | 0.36 | 0.02 | 0.02 | 0.18 | 0 | 0 | 0 | 0 |
|
Distance | 0.49 | 0.26 | 0.19 | 0.12 | 0.04 | 0.02 | 0.01 | 0.01 |
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Temperature | 0.6 | 0.36 | 0.92 | 1.28 | 1.63 | 2 | 3.41 | 3.69 |
Habitability
Habitable zone of the star: 594.7 - 856.8 AU
The planet has mass comparable to Earth.