Help Shape the Future of Space Exploration

Join The Planetary Society Now  arrow.png

Join our eNewsletter for updates & action alerts

    Please leave this field empty

Headshot of Emily Lakdawalla

Triple asteroid 1994 CC rotation animation

Posted by Emily Lakdawalla

06-08-2009 22:39 CDT

Topics: pretty pictures, animation, amateur image processing, radar imaging, asteroids, Earth impact hazard, near-Earth asteroids, radio telescopes

From the "just plain cool" department. I love animations of planetary images and I love radar images of asteroids -- so this animation is doubly cool. The only thing I don't like about radar images is that they have a lot of salt-and-pepper noise. So I fiddled with the animation they released, doing a Gaussian blur on each frame to try to reduce the effect of the noise. I think it helps make the rotation more visible, but if you'd like to see the original you can check it out on Photojournal.

Triple asteroid 1994 CC

NASA / JPL / GSSR / Emily Lakdawalla

Triple asteroid 1994 CC
The Arecibo radio telescope captured numerous Doppler-delay radar images of triple asteroid 1994 CC over 77 minutes on June 12, 2009. Doppler-delay images plot Doppler shift on the horizontal axis and distance from the telescope on the vertical axis. The image shows three components of 1994 CC, one large one about 700 meters in diameter, and two much smaller ones about 50 meters in diameter. The relatively fast rotation of the larger body spreads it out in the horizontal direction; the other two are probably locked into synchronous rotation with the large body, so rotate much more slowly. You can actually see features on the large body rotate into and out of view with the body's counterclockwise rotation. This version of the image has been blurred to counteract the distracting effect of noise. The original image can be downloaded here.

See other posts from August 2009


Or read more blog entries about: pretty pictures, animation, amateur image processing, radar imaging, asteroids, Earth impact hazard, near-Earth asteroids, radio telescopes


Leave a Comment:

You must be logged in to submit a comment. Log in now.
Facebook Twitter Email RSS AddThis

Blog Search


Advocate for Space!

Fifteen years ago, Society members and passionate space advocates like you helped save the Pluto mission. Now we can do the same for missions to Europa and Mars.

Join over 27,600 people who have completed their petition and consider a donation to support advocacy efforts.

Sign Our Petition

Featured Images

Blue Origin New Shepard after first landing
New Shephard test flight and booster landing
Suni Williams and Doug Hurley in Crew Dragon
SpaceX Falcon 9 and Crew Dragon on pad 39A
More Images

Featured Video

MISSIONS: Dawn In The Asteroid Belt With Marc Rayman

Watch Now

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Selfies to Space!

Take flight with a selfie on LightSail™ in 2016!

Send a Selfie Now

Connect With Us

Facebook! Twitter! Google+ and more…
Continue the conversation with our online community!