mercredi 15 février 2017
NASA's OSIRIS-REx Takes Its First Image of Jupiter & OSIRIS-REx Takes Closer Image of Jupiter
NASA - OSIRIS-REx Mission patch.
Feb. 15, 2017
NASA's OSIRIS-REx Takes Its First Image of Jupiter
This magnified, cropped image showing Jupiter and three of its moons was taken by NASA’s OSIRIS-REx spacecraft’s MapCam instrument during optical navigation testing for the mission’s Earth-Trojan Asteroid Search. The image shows Jupiter in the center, the moon Callisto to the left and the moons Io and Europa to the right. Ganymede, Jupiter’s fourth Galilean moon, is also present in the image, but is not visible as it is crossing in front of the planet. Image Credits: NASA/Goddard/University of Arizona.
The image was taken at 3:38 a.m. EST on Feb. 9, 2017, when the spacecraft was 75 million miles (120 million kilometers) from Earth and 419 million miles (675 million kilometers) from Jupiter. With an exposure time of two seconds, the image renders Jupiter overexposed, but allows for enhanced detection of stars in the background.
NASA's OSIRIS-REx Takes Closer Image of Jupiter
During Earth-Trojan asteroid search operations, the PolyCam imager aboard NASA’s OSIRIS-REx spacecraft captured this image of Jupiter (center) and three of its moons, Callisto (left), Io, and Ganymede. The image, which shows the bands of Jupiter, was taken at 3:34 a.m. EST, on Feb. 12, when the spacecraft was 76 million miles (122 million kilometers) from Earth and 418 million miles (673 million kilometers) from Jupiter. PolyCam is OSIRIS-REx’s longest range camera, capable of capturing images of the asteroid Bennu from a distance of two million kilometers. Image Credits: NASA/Goddard/University of Arizona.
This image was produced by taking two copies of the same image, adjusting the brightness of Jupiter separately from the significantly dimmer moons, and compositing them back together so that all four objects are visible in the same frame.
NASA’s Goddard Space Flight Center in Greenbelt, Maryland provides overall mission management, systems engineering and the safety and mission assurance for OSIRIS-REx. Dante Lauretta of the University of Arizona, Tucson, is the principal investigator, and the University of Arizona also leads the science team and the mission’s observation planning and processing. Lockheed Martin Space Systems in Denver built the spacecraft and is providing flight operations. Goddard and KinetX Aerospace are responsible for navigating the OSIRIS-REx spacecraft. OSIRIS-REx is the third mission in NASA’s New Frontiers Program. NASA’s Marshall Space Flight Center in Huntsville, Alabama, manages the agency’s New Frontiers Program for its Science Mission Directorate in Washington.
OSIRIS-REx (Origins Spectral Interpretation Resource Identification Security Regolith Explorer): http://www.nasa.gov/mission_pages/osiris-rex/index.html
Images (mentioned), Text, Credits: NASA/Karl Hille.
Publié par Orbiter.ch à 15:19