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View Full Version : Most distant asteroid,comet,planetlike object



Denis12
2005-Dec-28, 03:23 AM
What is the most distant Asteroid,comet or planetlike object known (out)side our solarsystem? I think that is not the tenth planet. Who can tell me this,and who can explain that? Thanks. Denis.

tony873004
2005-Dec-28, 03:54 AM
It's probably a hyperbolic comet observed centuries ago. But we can only guess at its position now as it would be too far to observe.

If you mean something we can point a telescope at and see, then it would be the "10th planet".

Gillianren
2005-Dec-28, 04:00 AM
Well, there have been planets discovered around other stars. Is that what you mean?

Denis12
2005-Dec-28, 06:52 PM
Where can i get information about that hyperbolic comet? and how far is it from the sun,from us,and from the orbit of pluto? And what is the object named Sedna? Can somebody tell and explain me? Thanks. Denis.

ToSeek
2005-Dec-28, 06:58 PM
The most distant planet found so far is 17,000 light years away. (http://www.space.com/scienceastronomy/exoplanet_new_0404015.html)

The best writeup on Sedna is probably here (http://www.gps.caltech.edu/~mbrown/sedna/), courtesy of the discoverer.

Ilya
2005-Dec-28, 07:41 PM
The most distant planet found so far is 17,000 light years away. (http://www.space.com/scienceastronomy/exoplanet_new_0404015.html)

The best writeup on Sedna is probably here (http://www.gps.caltech.edu/~mbrown/sedna/), courtesy of the discoverer.
If Denis12 means "currently the most distant object visible through a telescope," then the answer is 2003 UB313, or "tenth planet" (http://www.daviddarling.info/encyclopedia/A/2003_UB313.html). At the moment it is 97 AU from the Sun, while Sedna (http://www.gps.caltech.edu/~mbrown/sedna/) is "only" 90 AU. If he means "the visible object which gets farthest from the Sun," then the answer is Sedna -- at aphelion it is about 950 AU from the Sun, but won't get there for more than 5,000 years.

If Denis12 does not care about the object being actually visible through any telescope, then it is the exoplanet 17,000 light-years away.

Denis12
2005-Dec-28, 08:51 PM
What is sedna for kind of object,and why is its orbit around the sun so extreme from 90 AU to an amazing 940 AU? Where can i find a chart of its orbit around the sun? How is it discovered,but it is to faint to see it through telescopes. And how much AU is pluto from the sun in its closest to the sun,at this moment ,and at its greatest distance from the sun? Denis.

Denis12
2005-Dec-28, 11:05 PM
No reaction? but i am patient. Thanks. Denis.

SirBlack
2005-Dec-28, 11:33 PM
Sedna's Wikipedia entry (http://en.wikipedia.org/wiki/90377_Sedna)

Pluto's Wikipedia entry (http://en.wikipedia.org/wiki/Pluto)

That should get you much of the information you're looking for.

ToSeek
2005-Dec-29, 06:54 PM
No reaction? but i am patient. Thanks. Denis.

If you had gone to the link I provided (http://www.gps.caltech.edu/~mbrown/sedna/), you'd find most of the information you requested there, particularly several diagrams of Sedna's orbit.

Nereid
2005-Dec-30, 10:58 AM
No reaction? but i am patient. Thanks. Denis.Just over two hours, on 28 December? I expect that quite a few of the BAUT members are checking out the Q&A section of BAUT a little less frequently than they might otherwise (not to mention that this time period is one in which some of our members are usually asleep - lazy things).

jkmccrann
2006-Jan-03, 03:45 PM
If you had gone to the link I provided (http://www.gps.caltech.edu/~mbrown/sedna/), you'd find most of the information you requested there, particularly several diagrams of Sedna's orbit.

It is truly a bizarre orbit that Sedna has (at least in terms of our current knowledge & observations). I'm willing to posit that it'll be a fair amount of time before we actually send a probe to visit this place. If ever.