Hi, I didn't find this one in your database:
http://space.newscientist.com/article/mg19926703.700-solar-system-cloud-sends-giant-comet-our-way.html
A GIANT comet spotted between the orbits of Uranus and Neptune is the first object known to have come from an exotic part of the solar system called the inner Oort cloud.
The 100-kilometre-wide lump of ice was spotted two years ago in an oddly eccentric orbit around the sun. The comet is now at its closest point, about 24 astronomical units (AU) away (1 AU is the distance from the sun to the Earth). The most distant point in its orbit is nearly 1600 AU from the sun. Comets from the outer Oort cloud are the only objects known to travel further from the sun, reaching distances of between 20,000 and 200,000 AU.
Theorists have long predicted the existence of an inner Oort cloud, but this is the first observation of a body coming from it. This may be because the sun's gravity is still relatively strong at this distance, so we are less likely to see comets dislodged by a passing star.
To trace the origin of the comet, Andrew Becker and Nathan Kaib of the University of Washington, Seattle, ran a number of orbital simulations proving that the inner Oort cloud was the most likely origin. They reported their findings on 18 August at a meeting in Chicago on the Sloan Digital Sky Survey.
http://space.newscientist.com/article/mg19926703.700-solar-system-cloud-sends-giant-comet-our-way.html
A GIANT comet spotted between the orbits of Uranus and Neptune is the first object known to have come from an exotic part of the solar system called the inner Oort cloud.
The 100-kilometre-wide lump of ice was spotted two years ago in an oddly eccentric orbit around the sun. The comet is now at its closest point, about 24 astronomical units (AU) away (1 AU is the distance from the sun to the Earth). The most distant point in its orbit is nearly 1600 AU from the sun. Comets from the outer Oort cloud are the only objects known to travel further from the sun, reaching distances of between 20,000 and 200,000 AU.
Theorists have long predicted the existence of an inner Oort cloud, but this is the first observation of a body coming from it. This may be because the sun's gravity is still relatively strong at this distance, so we are less likely to see comets dislodged by a passing star.
To trace the origin of the comet, Andrew Becker and Nathan Kaib of the University of Washington, Seattle, ran a number of orbital simulations proving that the inner Oort cloud was the most likely origin. They reported their findings on 18 August at a meeting in Chicago on the Sloan Digital Sky Survey.
