Join Donate

The Bruce Murray Space Image Library

Asteroid 4179 Toutatis as seen simultaneously from Paranal and La Silla

Asteroid 4179 Toutatis as seen simultaneously from Paranal and La Silla

Click to view full image

ESO

Asteroid 4179 Toutatis as seen simultaneously from Paranal and La Silla
Two images of asteroid 4179 taken on September 29, 2004, at 02:30 UTC, when the asteroid was passing through the constellation of Triangulum Australe (the Southern Triangle) have been superimposed. The images were taken from two sites, La Silla and Paranal, demonstrating the effect of parallax.

Composite, false-colour image showing asteroid (4179) Toutatis moving in front of background stars, as seen from Paranal (red trail) and La Silla (green trail). The two photos used for this combination were obtained nearly simultaneously in the morning of September 29, at 02:30 hrs UT, when the asteroid was passing through the constellation of Triangulum Australe ("The Southern Triangle"). The offset between the two trails corresponds to the difference of the lines-of-sight from the two telescopes towards the object. Two 1-min images were taken almost simultaneously with the FORS-1 instrument on Kueyen, the second 8.2m VLT Unit Telescope on Paranal, and on the WFI camera installed on the ESO/MPI 2.2m telescope at La Silla. The WFI image was obtained though a R broad-band filter; on the VLT, a narrow band [O III] interference filter was used to attenuate the light of the bright asteroid. The images were then scaled and processed in order to compensate for the different characteristics of the two instruments (scale, orientation, distortion, sensitivity). The VLT image is displayed in red, the WFI image in green. As the stars are common to both images, they appear yellowish.

Original image data dated on or about September 29, 2004

Explore related images: near-Earth asteroids, pretty pictures, Earth impact hazard, astronomy, asteroids, asteroid 4179 Toutatis, optical telescopes

Comments & Sharing
More Images
astronaut on Phobos
Let's Change the World

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Today

Bruce Murray and Carl Sagan
Pretty Pictures

Support the Bruce Murray Space Image Library and help us share the wonders of other worlds.

Donate