User:Kepler-1229b/sandbox/PSR 1257+12 D
| Discovery | |
|---|---|
| Discovered by | Aleksander Wolszczan |
| Discovery site |  Poland |
| Discovery date | 2002 |
| Pulsar Timing | |
| Orbital characteristics | |
| ~2.6 | |
| ~3.5 y | |
| Physical characteristics | |
Mean radius | 0.08 |
| Mass | 0.0004 |
PSR B1257+12 D is a possible extrasolar dwarf planet approximately 980 light-years away in the constellation of Virgo. It is suspected that a dwarf planet is orbiting PSR B1257+12 at an average orbital distance of 2.6 AU with an orbital period of approximately 3.5 years.
Originally, in 1996, a possible Saturn-like (100 Earth mass) gas giant was announced orbiting the pulsar at a distance of about 40 AU. However, the discovery was not conclusive and was later retracted. It is now thought that the signal came from a dwarf planetary body.
The object is thought to be very small, less than 20% of the mass of Pluto.[1]
References[edit]
External links[edit]
- "PSR 1257+12 D". Extrasolar Visions. Retrieved 16 December 2008.
- "Exo-Dwarf Planets".
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| Planets | ||
Category:Exoplanets PSR 1257+12D Category:Science and technology in Poland Category:Virgo (constellation) Category:Exoplanets detected by timing
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