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User:Kepler-1229b/sandbox/PSR 1257+12 D

Coordinates: Sky map 13h 00m 01s, +12° 40′ 57″
From Wikipedia, the free encyclopedia
PSR B1257+12 D
Discovery
Discovered byAleksander Wolszczan
Discovery site Poland
Discovery date2002
Pulsar Timing
Orbital characteristics
~2.6
~3.5 y
Physical characteristics
0.08
Mass0.0004

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

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  • "PSR 1257+12 D". Extrasolar Visions. Retrieved 16 December 2008.
  • "Exo-Dwarf Planets".


Category:Exoplanets PSR 1257+12D Category:Science and technology in Poland Category:Virgo (constellation) Category:Exoplanets detected by timing