PIA17356: Annular Eclipse of the Sun by Phobos, as Seen by Curiosity


Annular Eclipse of the Sun by Phobos, as Seen by Curiosity

Caption:

This set of three images shows views three seconds apart as the larger of Mars' two moons, Phobos, passed directly in front of the sun as seen by NASA's Mars rover Curiosity. Curiosity photographed this annular, or ring, eclipse with the telephoto-lens camera of the rover's Mast Camera pair (right Mastcam) on Aug. 20, 2013, the 369th Martian day, or sol, of Curiosity's work on Mars.

Curiosity paused during its drive that sol for a set of observations that the camera team carefully calculated to record this celestial event. The rover's observations of Phobos help researchers to make measurements of the moon's orbit even more precise. Because this eclipse occurred near mid-day at Curiosity's location on Mars, Phobos was nearly overhead, closer to the rover than it would have been earlier in the morning or later in the afternoon. This timing made Phobos' silhouette larger against the sun -- as close to a total eclipse of the sun as is possible from Mars.

Background Info:

Malin Space Science Systems, San Diego, built and operates Mastcam. NASA's Jet Propulsion Laboratory manages the Mars Science Laboratory mission and the mission's Curiosity rover for NASA's Science Mission Directorate in Washington. The rover was designed, developed and assembled at JPL, a division of the California Institute of Technology in Pasadena.

For more about NASA's Curiosity mission, visit http://www.jpl.nasa.gov/msl , http://www.nasa.gov/mars , and http://marsprogram.jpl.nasa.gov/msl .

Cataloging Keywords:

Name Value Additional Values
Target Phobos Mars, Sun
System Mars
Target Type Satellite Planet, Sun
Mission Mars Science Laboratory (MSL)
Instrument Host Curiosity Rover
Host Type Rover
Instrument Mast Camera (MastCam)
Detector
Extra Keywords Eclipse, Grayscale
Acquisition Date
Release Date 2013-08-28
Date in Caption 2013-08-20
Image Credit NASA/JPL-Caltech/Malin Space Science Systems/Texas A&M Univ.
Source photojournal.jpl.nasa.gov/catalog/PIA17356
Identifier PIA17356