Minor Planets (all the stuff that isn’t one of the eight (no longer nine since Pluto got dissed)

The Minor Planet Center web site, a Smithsonian Operation, so pretty serious stuff, lots of info, just a scan of the lists could alter your view of the local environs we live in.  1200 plus potential dangerous asteroids….known and in the inner system today, tens of thousands of other bodies out there, ready to play interplanetary billiards if something really hairy this way came.  But mainly a very good resource for serious thought, serious business like eSpace objectives for mining, and for not so serious ventures such as SciFi.

Combo view from the fly by

A combo shows a sequence of images of the Lutetia asteroid at various distances before the closest approach of the Rosetta spacecraft in 2010. A rare opportunity to observe an asteroid at close quarters has unveiled a remarkable rock that seems to be a precursor of a planet, astronomers reported on Thursday.

So I found the article with the above picture (click through) fascinating,  dealing with an asteroid that got a fly by last year by Rosetta (ESA Spacecraft.)  “The astronomers calculate Lutetia to be 121 kilometres (75 miles) long, 101 kms (63 miles) tall and 75 kilometres (47 miles) wide.”  “Lutetia’s high density, at 3,400 kilos per cubic metre (212 pounds per cubic foot), its large size and its ancient surface make it different from any other asteroid studied so far, the studies said.”

This is Eros the first asteroid to be visited, “34.4×11.2×11.2 km in size 34.4×11.2×11.2 km in size” “Mean density 2.67±0.03 g/cm³ ”  or about 2670 kilos per cubic meter.

Eros Montage from Wikipedia...approximatly real color

 Below is Temple,  a comet visited by two spacecraft.  “Mean density 0.62 g/cm³ ”  or 620 kilos per meter.

Annotated images of Tempel 1 from two spacecraft.

Comparison of From Wikipedia: Deep Impact and Stardust photos of a smooth elevated feature on the surface of the nucleus showing recession of icy cliffs at the margins

 With this information it becomes obvious that the make up of the minor worlds is much more diverse than had begun to be thought.   Eros is pretty dense but still probably filled with voids, obviously Temple is pretty much a rubble pile, which astronomers think is true of other bodies. 

So Lutetia is too dense to be a rock pile or even void filled, it has to be as solid as a planet, they think it’s a left over planetesimal from the early creation of the solar system.   The only way it can be as dense as it is, is if it went through a molten phase. Given that a shell even a ‘few’ miles thick of rock provide a good insulator it is apparently possible that Lutetia has a molten core. 

Does that mean there could be differentiated materials in that crunchy coating?  It seems to be an obvious target for mining, where there is pretty much zero risk of cave ins.  What are the odds of a good distribution of useful materials for the space industrial infrastructure?   This may or may not be a valid mining target, but it points out some things to think about.

 

 

Why 5 Years?

‘Musk has a great point.’ when doing projections, part of my job, I know that I ‘should’ be able to project a couple of years into the future with at least some expectation of being close, but after 18 months you know it’ll be wrong. You can forecast five years out in general terms based on ‘momentum’ but you know that all you are doing is a version of ‘Moores Law’ which is more a market roadmap than anything else. This is more about tech-base support than anything else, and a form of jobs program, one that is needed at some level. But maybe a bit more flexible approach can be found.

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Not saying ULA is doing anything wrong, this is just old style mindsets setting policy.

Moon Base Tovarich

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“If it turns out that the Moon has a number of caves that can provide some protection from radiation and meteor showers, it could be an even more interesting destination than previously thought,” said veteran cosmonaut Sergei Krikalev, quoted in an article by Reuters.”

Damn! I wish I’d known this when I was writing “Moon Dreams!”

Reuse, respin, start-from, even salvage: how is this bad?

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A concept to boost parts of the ISS either into Lunar orbit or to one of the Lagrange points. One negative comment pointed out the ISS requires a lot of support. Well there is no reason you can’t resupply and crew as needed instead of full time. The point here would be reuse of a facility that is already in orbit ( $aving in the tens of millions to billions in the process) and by that point would have fulfilled it’s original purpose (however vague that was.)

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Boeing is getting crap for suggesting the X-37 could be used as is, scaled up, or scaled and crewed. How can it be a bad idea to take a successful aerospace-craft as the basis of future growth. The original X-37 was intended for just this sort of scaling. O.K. it being Boeing does worry me, a little, but they have the scale, resources, focus (maybe) and balls (probably) to do this. My main concern is the crowding out of smaller eSpace players. But the eSpace crowd appear to have gotten their climbing claws dug in and seem to be on a flight path of their own. As long as BigB is climbing as well as, not instead of, I think we’re good.

Space – Dreams – Mind – Future Mil

International Space Station's Expedition 29 crew on September 17, 2011, while cruising over the Indian Ocean near Australia and south of Madagascar

 Is it only after certain brute needs are met that we can look up and see the wonder, the beauty of the world around us? And if you are trapped in the mental, social, and light smeared deserts where too many of us live in, does it takes a special imagination to see beyond the here and now?

SNC Dream Chaser Docked with ISS

Sierra Nevada Corporation dreams big with the Dream Chaser, a crewed spaceplane based on the NASA/AF experimental lifting body designs from the ’70s (It was the crash of one of these that was a lead in to the Six Million Dollar Man TV show by the way, not to put you off.)

They have a composite fuselage built and have experimented / developed (like Virgin Galactic) a hybrid rocket motor.  A hybrid rocket motor has a solid fuel but liquid / gaseous oxidizer. You don’t have to deal with the complex plumbing of a pure liquid motor or the uncontrolability of a solid. They are talking to Scaled Composites/Virgin Galactic about catching a ride into the stratosphere on a White Knight II.  I’d even guess a sub orbital launch from a WKII is likely. I then hope they talk to SpaceX about a ride to orbit on a Falcon.  There is no reason these various guys shouldn’t be looking at cooperation as their technologies mature, or not.  Its possible the SpaceX dragon will be a wonderful cargo hauler but not a real solution for crew return or maybe won’t really be reusable….

There seem to be a lot of people dreaming about a lot of options, far and away above what NASA has been able to do for most of my life.  I can only hope this continues. 

And by the way, the guys who are supporting this stuff, they’re all in the 1% the OWS crowd are against.  When OWS talk about bankers, they almost have my sympathy, but when I look to eSpace and Steve Jobs, even Gates, then that faint flicker, flickers out.

You have to have big assets to make big dreams real, and as long as they are spending it on this sort of thing, I’m all for them keeping every last cent of what they make in the money world. 

Article Front Piece

What happens when your memory is so faulty you don’t even know your memory is faulty?

I was reading an article in an actual paper magazine Brain Power that was discussing the problems of a patient with a particular type of brain damage. The patient had a form of amnesia that let him remember old information, from before the brain damage, but not since, the person can do all the normal things, dress and take care of themselves, but they are living in an eternal now. And because all they have is a fixed past and an utterly confusing now their mind basically fills in the gaps, without ongoing memories the persons brain/mind cannot do the sort of ‘running average’ comparison of the now with the near, recent, etc past that keeps us (most of us, relatively) grounded in the hear an now.  So this person asked a simple question about where they are and why, would come up with various stories, from the nearly right to the utterly fantastical and apparently believe them and operate as if they were true. 

So maybe writing Sci Fi requires a certain amount of amnesia?

Baen Article header
Beating the Decline..

There is a very interesting article at Baen the premier outlet for Sci Fi these days particularly Mil Sci Fi.  Mr. Dunn has done an excellent job of outlining the current trajectory of the mil world from the threat to the budget and the current reaction of the Tech Services, the Navy and Air Force, I eagerly await the second part which will deal with the ground forces. 

The situation in grunt land has always been more complex than that in the technical services, not to say that the sea or the air are simple, just simpler, on land you have the interaction of so many things that it is hard to readily predict what will work and what won’t.

I can hear a lot of cat calls regarding the fact that Navies and Air Forces have made huge missteps. And I agree but in general those mistakes while suboptimal where still better than what came before.  In the mud its not clear that this is always the case. Now I’m not talking about weapons like nukes or even heavy artillery, these are technical services, but as we have found out in Iraq and Af’stan its boots on the ground that matter and a thousand little actions that eventually spell success or failure.

In the J.S.Zaloga book Panther vs. Sherman focusing on the battle of the bulge the author re-examines the face off between these two tanks. And while in most pure technical terms of armor, gun, ground pressure, engine power, the Sherman comes off the worse, in fact tactically it often won. For many reasons, reliability, more vehicles, fighting from ambush, generally more agile, better visibility. 

While better equipment is often an amplifier, training, logistics and morale are generally more important once you have reached reasonable parity.  You are not going to beat even a PzKfWgn II with straight up lancer charge. But there is no reason that an armored force couldn’t be fought to a standstill by folks on horses given horse portable anti tank weapons, equivalent logistics and lack of air superiority (Russia in Af’stan anyone?)

Precision weapons and ubiquitous day/night recon and observation are having profound effects on open field warfare.  And the emergence of extended urban/sub-urban campaigns are making things even more difficult.  Then there is the emergence of powerfully armed subnational or non-national forces whose operations are distributed temporally and geographically, to such an extent that they look like policing problems, but are really outside of the scope of traditional police force, since they are often heavily armed and operate largely within the law except for occasional egregious exceptions…..

So I’ll be interested to see what Mr. Dunn has to say in his second article.