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Compass and Scale Image for Phobos and Mars

Compass and Scale Image for Phobos and Mars

About the Data

  • Data Description
    Data DescriptionProposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
    Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.
    Data were provided by the HST proposal 14499 taken by the Hubble Heritage Team: Z. Levay (STScI) PI.
  • Instrument
    InstrumentThe science instrument used to produce the data.
    WFC3/UVIS
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    May 12, 2016
  • Filters
    FiltersThe camera filters that were used in the science observations.
    F275W (275nm), F410M (410nm), F502N (502nm), and F673N (673nm)
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    Phobos
  • Object Description
    Object DescriptionThe type of astronomical object.
    Moon of Mars
  • Release Date
    July 20, 2017
  • Science Release
    NASA’s Hubble Sees Martian Moon Orbiting the Red Planet
    Read the release
  • Credits
    NASA, ESA, and Z. Levay (STScI)

Downloads

  • Full Res, 3000 × 2400
    tif (2.42 MB)
  • 1000 × 800
    png (456.71 KB)
  • 2000 × 1600
    png (1.22 MB)
  • Full Res, 3000 × 2400
    png (1.98 MB)
Compass and Scale Image for Phobos and Mars
Color Info
Color InfoA brief description of the methods used to convert telescope data into the color image being presented.

This image is a composite of separate exposures acquired by the WFC3/UVIS instrument. Several filters were used to sample various wavelengths. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Purple: F275W (275nm) Blue: F410M (410nm) Green: F502N (502nm) Red: F673N (673nm)

Compass and Scale
Compass and ScaleAn astronomical image with a scale that shows how large an object is on the sky, a compass that shows how the object is oriented on the sky, and the filters with which the image was made.

Related Images & Videos

NASA’s Hubble Sees Martian Moon Orbiting the Red Planet

NASA’s Hubble Sees Martian Moon Orbiting the Red Planet

The sharp eye of NASA's Hubble Space Telescope has captured the tiny moon Phobos during its orbital trek around Mars. Because the moon is so small, it appears star-like in the Hubble pictures. Over the course of 22 minutes, Hubble took 13 separate exposures, allowing astronomers...

Time-lapse of Phobos in Orbit around Mars (Annotated, Smoothed)

Time-Lapse of Phobos in Orbit Around Mars (Annotated, Smoothed)

This time-lapse video captures a portion of the path that tiny Phobos takes around Mars. Over the course of 22 minutes, Hubble snapped 13 separate exposures of the little Martian moon. The transitions between frames have been smoothed to illustrate continuous motion. Phobos...

Time-lapse of Phobos in Orbit around Mars (Smoothed)

Time-Lapse of Phobos in Orbit Around Mars (Smoothed)

This time-lapse video captures a portion of the path that tiny Phobos takes around Mars. Over the course of 22 minutes, Hubble snapped 13 separate exposures of the little Martian moon. The transitions between frames have been smoothed to illustrate continuous motion. Phobos...

Time-lapse of Phobos in Orbit around Mars

Time-Lapse of Phobos in Orbit Around Mars

This time-lapse video captures a portion of the path that tiny Phobos takes around Mars. Over the course of 22 minutes, Hubble snapped 13 separate exposures of the little Martian moon. Phobos completes an orbit in just 7 hours and 39 minutes, which is faster than Mars rotates....

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Details

Last Updated
Mar 14, 2025
Contact
Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov

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