Bench Press

Previously we’ve covered the extensive tracking and modeling of near-earth objects NASA undertakes as well as efforts to pass along data to the public via the internet. In Ben’s post about modeling near-earth objects he wrote about a specific asteroid designated 99942 Apophis. Discovered in 2004, it has been closely scrutinized by astronomers worldwide as it’s size and potential for collision with Earth have sparked interest.

Meet Apophis. Discovered in 2004, it will likely set a record for harmless near earth pass in 2029.

Earlier data pointed to the asteroid potentially passing through a troublesome gravitational keyhole which increased the threat to Earth in 2036, however new data from previously unreleased images from a University of Hawaii telescope near the summit of Mauna Kea have allowed NASA scientists to improve their models. New models show a reduced risk of collision in 2036 from 1 in 45,000 to 1 in 250,000.

From the NASA press release:

“The refined orbital determination further reinforces that Apophis is an asteroid we can look to as an opportunity for exciting science and not something that should be feared,” said Don Yeomans, manager of the Near-Earth Object Program Office at JPL.

Modeling asteroids and allowing humanity a chance to risk assess is only one example of the power of computer modeling. However, this example also illustrates one important caveat about modeling. One’s model is only as good as the data utilized in generating and analyzing it. Let’s hope that future data on Apophis continues to produce good news.

(Image Credit)

We’ve previously covered the computer modeling solutions being used to model and track the paths of near-earth asteroids (especially those which might treat Earth like a dartboard), but for those of you not content to just sit at home while NASA scientists do all the tracking, the asteroid trackers at NASA’s Jet Propulsion Laboratory have made it now easier to follow what’s going on in the world of near-earth asteroids from the comfort of your own home.

The first little gadget they’ve developed is a computer widget (pictured on the left) which is compatible with the Mac OS and Yahoo widget engines.

What it will show is a list of the next five near-earth asteroid approaches (within ~20x the distance of the moon) and an estimate of their size (including a pictogram depiction of what that size means) as well as their distance. The widget will also make it easy to find more information about the particular asteroids it is identifying (an example is linked here) which will show off a dynamic Java applet map of the asteroid’s orbit through the inner solar system (which you can manipulate so you can see how the orbit looks in 3D) as well as a wide range of data on the asteroid such as the eccentricity of an asteroid’s orbit (in layman’s terms, how oval-like versus how circular), the orbital period (the time it takes for an asteroid to complete one rotation around the sun).

The second thing the brains at NASA’s JPL have put together for researchers and amateur astronomers is a Twitter account (@AsteroidWatch), which accompanies NASA JPL’s main Asteroid Watch site. The feed went live on July 29, 2009 and, although not written in the cutesy voice of the MarsPhoenix twitter account (which followed the exploits of the Phoenix Mars probe NASA launched a while back), the AsteroidWatch feed so far has reported on near-earth asteroids and new reports and articles issued by NASA’s official asteroid tracking team.

You can follow the BenchPress team on Twitter! You can follow us at Anthony (@AnthonyPhan), Ben (@BenjaminTseng), Eric (@EricSuh), and Kevin (@Kevin_Tseng).