Quick question about 3753 Cruithne

[mithridates]

What would it take to bring it into a permanent (more or less) orbit of 100,000 km around the Earth, and what would it look like in the sky? <br /><br />http://en.wikipedia.org/wiki/3753_Cruithne <div class="Discussion_UserSignature"> <p>----- </p><p>http://mithridates.blogspot.com</p> </div>

 

[mikeemmert]

It would take an awful lot. Cruinthe is steeply inclined to the plane of the ecliptic and flyby velocity is quite high. Even though the distance is fairly short, it takes a lot of energy to get there.<br /><br />There are more suitable asteroids.

 

[search]

http://www.astro.uwo.ca/~wiegert/3753/3753.html<br /><br />I do not know how it would like but if you try to bring a few more it will look like this<br />http://www.seds.org/nineplanets/nineplanets/pics/compare4.jpg<br />

 

[mithridates]

I'm thinking more along the lines of what an asteroid of that size orbiting the Earth at about 100,000 km would look like from the ground. Since there seem to be other more suitable asteroids, let's assume one of those. Any feasible asteroid with about 3~5 km in diameter. <div class="Discussion_UserSignature"> <p>----- </p><p>http://mithridates.blogspot.com</p> </div>

 

[search]

Hello Eupator Dionysius<br />As far as i know it cannot be seen at naked eye from earth. A 5km object at around 100 000km it still quite small even if it is very reflective which most of the asteriods are not.<br />Read on reflectivity:<br />http://www.pa.msu.edu/courses/2003summer/ISP205/w7.pdf#search="3753%20Cruithne%20reflectivity"<br />Curiosity about impact sizes and consequences:<br />http://garage.physics.iastate.edu/astro120/pdf/Lect21sdk.pdf#search="3753%20Cruithne%20reflectivity"