Are there any such stable orbits? The only one I can think of would be an elliptic orbit, passing between the moon and Earth when the moon is nearer the sun and out beyond the moon on the other side, but I imagine that would have a slower period than the moons' orbit so wouldn't work anyway? I expect a large shield would achieve the same effect though.Parking the depot in a stable orbit that could keep it in the lunar shadow would be a good start.
What if we were to mine this even know it's not technically "near earth." Depends what you call "Near Earth"Continuing a conversation from Electrical Engineering, here are a few links to discuss.
What if we were to mine this even know it's not technically "near earth." Depends what you call "Near Earth"
Also im not really too knowledgable with this subject I'm only 12 but some helpful feedback would be nice.
Some info here. http://webbtelescope.org/article/Technology_at_the_Extremes/8There is no such orbit. Relevance for LEO/GEO missions means the orbital period has to be a day or shorter and the satellite has to be close to Earth - the moon won't be between Earth and sun for most of its time, and even when it is, the satellite would pass through the shadow quickly.
JWST has passive cooling down to 50 K, better than what is needed for hydrogen/oxygen depots, and some active cooling would be possible as well (unlike the JWST, the depot is not that sensitive to vibrations and smaller changes in the thermal environment).
So do the uppermost meters of Earth's crust.The Near Earth Asteroids (NEAs) alone contain enough of every element to support an affluent and fully recycling population of 500 billion people.
Is it alright to ask a question and provide a possible if highly hypothetical speculative suggestion?101955 Bennu is a near Earth asteroid, and quite a prominent one: it has a 0.04% probability to hit Earth in the 22nd century, and 10% chance to hit it within the next millions of years.
As comparison: an impact of an asteroid as large as Bennu happens on average every ~100,000 years, which corresponds to a 0.1% chance of such an impact per century.
It was chosen as target for the mission because it is easy to access and because a better understanding of it helps to predict its future orbit and also future orbits of similar objects.
The claim in Wiki is different.Spinning up tells me the object is gravitationally differentiating. With higher density material, sinking towards the center. Pushing lower density material towards the surface.
so, plausibly, solar radiative heating also underlies the particle emissions?The claim in Wiki is different.
"Due to the uneven emission of thermal radiation from its surface as Bennu rotates in sunlight, the rotation period of Bennu decreases by about one second every 100 years"
The listed reference for that claim is https://www.asteroidmission.org/?latest-news=nasa-mission-reveals-asteroid-big-surprises