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Radar reveals two moons orbiting asteroid Florence

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41–50 of 54 posts

Re: Radar reveals two moons orbiting asteroid Florence

#41
How do the orbits of the moons, and the asteroid's axis of rotation match up to the ecliptic? Do both moons orbit in the same direction? How eccentric are the orbits of the moons?

What's the going theory on how such a small body can capture moons? It must not be too difficult, otherwise 3122 Florence wouldn't be the 3rd triplet spotted.

Re: Radar reveals two moons orbiting asteroid Florence

#42

How about we have satellites orbiting asteroids for a piggy back ride and then getting off the orbit when they are near a point of interest? My guess is the gravity would be too feeble.

Krastanov's answer is good, but it's worth adding that 'cyclers' are a similar but practical idea: https://en.m.wikipedia.org/wiki/Mars_cycler

Re: Radar reveals two moons orbiting asteroid Florence

#43
post #5

Imagine hijacking a 100-meter moon made of rare earth metals like gold, platinum, rhodium, ruthenium, iridium, etc. etc. More than enough to under write the mission and pay for a moon base.

Pet peeve: > rare earth metals like gold, platinum, rhodium, ruthenium, iridium Not one of those is a rare earth metal. The complete list of rare earth metals: cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), holmium (Ho), lanthanum (La), lutetium (Lu), neodymium (Nd), praseodymium (Pr), promethium (Pm), samarium (Sm), scandium (Sc), terbium (Tb), thulium (Tm), ytterbium (Yb), yttrium (Y). R…

Well, that shows me! ;-) Thank you, some of these metals I have never heard of.

Re: Radar reveals two moons orbiting asteroid Florence

#44
post #37

What's the surface gravity? https://en.wikipedia.org/wiki/3122_Florence Mass isn't given, but could estimate from volume, and typical asteroid density?

A quick wolfram alpha suggests about 0.002 ms^-2, i.e. about 1/500 Earth gravity.

9.8 / 0.002 = 4900, so was that about 1/5000 Earth gravity?

Re: Radar reveals two moons orbiting asteroid Florence

#46

Earlier quoted context omitted.

Pet peeve: > rare earth metals like gold, platinum, rhodium, ruthenium, iridium Not one of those is a rare earth metal. The complete list of rare earth metals: cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), holmium (Ho), lanthanum (La), lutetium (Lu), neodymium (Nd), praseodymium (Pr), promethium (Pm), samarium (Sm), scandium (Sc), terbium (Tb), thulium (Tm), ytterbium (Yb), yttrium (Y). R…

Well, that shows me! ;-) Thank you, some of these metals I have never heard of.

Well, they're quite rare :)

Re: Radar reveals two moons orbiting asteroid Florence

#47
post #15
post #5

Imagine hijacking a 100-meter moon made of rare earth metals like gold, platinum, rhodium, ruthenium, iridium, etc. etc. More than enough to under write the mission and pay for a moon base.

If we go grab a moon sized ball of gold, gold will lose most of its value. It'll be the next Aluminium.

Maybe if you do it.

If I do it, I don't think it's in my best interest to announce it like that.

Re: Radar reveals two moons orbiting asteroid Florence

#48
post #5

Imagine hijacking a 100-meter moon made of rare earth metals like gold, platinum, rhodium, ruthenium, iridium, etc. etc. More than enough to under write the mission and pay for a moon base.

Peter Diamandis[0] has repeatedly predicted that the world's first trillionaire will be made by mining asteroids.

Planetary Resources[1] is at least one company that is attempting to do it.

[0]: https://en.wikipedia.org/wiki/Peter_Diamandis

[1]: http://www.planetaryresources.com/asteroids/

Re: Radar reveals two moons orbiting asteroid Florence

#49
post #15

Earlier quoted context omitted.

If we go grab a moon sized ball of gold, gold will lose most of its value. It'll be the next Aluminium.

I never bought that argument. World gold production is about 100-200 billion per year. Just hold onto your meteor and sell 50 billion worth per year for the next 200 years.

You would need to do it in secret. Plot for the next James Bond movie?

Re: Radar reveals two moons orbiting asteroid Florence

#50
post #11

Earlier quoted context omitted.

The trick is getting it through the atmosphere intact.

The Apollo module was 20,000-kg. We could do it in 50,000-lbs chunks but we would have to process it on the moon first so it wouldn't crater when it landed. If the commodities market tanks, well, we'll value add it by selling it as "all weather platinum or gold siding" at Home Depot. ;-) Apollo weight info: https://www.google.com/search?q=apollo+commad+module+weight&...

You can just make a flattish shape out of it and most likely it will enter just fine.
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