Posted on 02/27/2014 5:19:00 PM PST by Yosemitest
Starry Night Pro is what I use to visualize the positions of various comets and asteroids from the perspective of the stereo spacecraft. It’s handy for a variety of reasons, it’s also easier to work with than Celestia, which is what I previously used in years past. Again, it can’t numerically integrate orbits over time, so it’s only used to compare the positions at orbital element epochs close to the time observation. ORSA can integrate those orbits over time and then the results be fed back into Starry Night if necessary, however.
I haven’t seen any new information, and I’ve been looking.
It’s still just a small comet which may give us a nice meteor shower. Your video is just more fear mongering. “The debris will be all sizes.” No, it will be small, not a “danger to earth.” The comet will miss earth by some 8 million kilometers, even if it fragments. We have 34 days until the comet reaches perigee. The separation velocities of comets that fragment are only in the tens of meters per second at best.
“Separation velocities.
The relative speed of the
fragments shortly after the fragmentation event amounts
from 0.1 to 15 m/s with the majority between 0.3 and 4 m/s.”
http://www.lpi.usra.edu/books/CometsII/7011.pdf
Taking the high end of that range, if the comet fragment right this moment at 15m/s separation velocity it would only be able to spread out to a radius of about 44,000 km, orders of magnitude smaller than the 8 million kilometer distance it will have next month.
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