vostok
Well-Known Member
Last night teaching my buddy Murph to roll a 'J' he discovered the largest solar system ever
Thats one large planet that takes about a million years to orbit its star. I wanted to name it RIU something
but it just wouldn't click, so we agreed on 2MASS-J and some numbers to help the nav. computers ..
The gas giant is one trillion kilometres away, making its orbit 140 times wider than Pluto's path
around our Sun.
Only a handful of extremely wide pairs of this kind have been found in recent years.
Details will appear in the Monthly Notices of the Royal Astronomical Society.
The planet, known as 2MASS J2126-8140, is between 12 and 15 times the mass of Jupiter.
"We were very surprised to find such a low-mass object so far from its parent star,"
said Dr Simon Murphy from the Australian National University (ANU).
"There is no way it formed in the same way as our solar system did, from a large disc of dust and gas."
This system is nearly three times the size of the previous widest star-planet pair.
The star and its planet were found by a survey of young stars and brown dwarfs in Earth's neighbourhood.
Once it was discovered they were a similar distance from the Earth
- about 100 light-years - they compared the motion of the two through space and realised
they were moving together.
"We can speculate they formed 10 million to 45 million years ago from a filament of gas that
pushed them together in the same direction," Dr Murphy explained.
"They must not have lived their lives in a very dense environment.
They are so tenuously bound together that any nearby star would have disrupted their orbit completely."
http://www.bbc.com/news/science-environment-35420633
(weed was Old Toby from southern star)