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Mike Brown
Astronomer, planet hunter, Pluto killer, bear whisperer, Finger-wrapped dad.
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Mike Brown Jul 31
Sedna region should have multiple objects more massive than Eris. I'd guess a dozen. Ish.
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Mike Brown Jul 31
to be clear: only ~1/3 chance of a BRIGHT kbo. More like 100% chance of a distant LARGE KBO (or beyond KB object, really)
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Mike Brown Jul 31
Bright in relative magnitude, not absolute magnitude!
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Mike Brown Jul 31
H=+1 is definitely silly. But, still, I guarantee you that the list of H<1 is not complete!
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Mike Brown Jul 31
bed"rock" is water ice. Surface frosts are N2, CH4, CO. Frost thickness unclear, but v. thick in places. Porosity? Dunno.
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Mike Brown Jul 29
I think Mordor on Charon is close enough.
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Mike Brown Jul 29
unknown. but definitely true for Eris.
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Mike Brown Jul 29
no particular reason for that
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Mike Brown Jul 29
I need to start accepting talk invitations based only on triathlon possibilities. hmmmm......
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Mike Brown Jul 29
atmosphere when Eris is closest, frozen on surface when it is furthest. not quite sure WHAT to call it....
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Mike Brown Jul 29
hugely significant, and quite a mystery.
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Mike Brown Jul 29
awesome. that's one i want to do one day.
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Mike Brown Jul 29
I think people would have immediately said "oh, another asteroid belt"
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Mike Brown Jul 29
nope. I think they just looked, never published.
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Mike Brown Jul 29
they were close. but the plates have been examined and they're not there.
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Mike Brown Jul 29
i think you could jump from the tip and launch yourself into orbit
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Mike Brown Jul 29
if it got spun up it would shed mass off the ends. but no good way to spin up out there w/o an impact
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Mike Brown Jul 29
you can measure the thickness with spectroscopy, too
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Mike Brown Jul 29
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Mike Brown Jul 29
more like 25 degrees
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