PSR B1257+12 A
Sub Earth orbiting PSR B1257+12 A / From Wikipedia, the free encyclopedia
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PSR B1257+12 b, alternatively designated PSR B1257+12 A, also named Draugr, is an extrasolar planet approximately 2,300 light-years (710 pc) away[4] in the constellation of Virgo. The planet is the innermost object orbiting the pulsar Lich, making it a pulsar planet in the dead stellar system. It is about twice as massive as the Moon, and is listed as the least massive planet (with the mass accurately determined) known, including among the planets in the Solar System.[1]
Quick Facts Discovery, Discovered by ...
Discovery | |
---|---|
Discovered by | |
Discovery site | United States[1] |
Discovery date | 22 April 1994 |
Pulsar timing | |
Orbital characteristics | |
0.19 AU (28,000,000 km)[2] | |
Eccentricity | 0.0[2] |
25.262 ± 0.003[2] d | |
Inclination | 50[2][note 1] |
2,449,765.6 ± 0.2[2] | |
Star | Lich |
Physical characteristics | |
Mass | 0.020 ± 0.002[2][note 1] ME |
Temperature | 266 K (−7 °C; 19 °F)[3] |
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