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Please refer to the new Kepler/K2 science website at http://keplerscience.arc.nasa.gov

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Kepler Guest Observer Program

The Kepler Field Of View

The corners of each Kepler CCD module are defined in both ascii and Microsoft Excel tables. Corners are provided in J2000 celestial coordinates for all four seasonal roll rotations.

The Kepler Field of View (FOV) can be viewed within Google Sky using either the Google Sky web interface or the Google Earth software. Both tools provide a visual aid to decide whether individual sources fall upon detector silicon.


  1. Navigate your web browser to Google Sky.
  2. Within the search field type
    where # is an integer corresponding to one of the seasons defined below (1-4).
  3. Hit the search button.


  1. Download one of the four seasonal Kepler FOV definition files.
  2. Start the Google Earth tool.
  3. Switch to Google Sky view.
  4. Navigate the file menu and open the downloaded file.
  5. The Kepler FOV will now be an item within your Places list.

In both tools described above, source names and celestial coordinates can be magnified upon using the search engine. Users note well that the current FOV file does not include distortions within the telescope optics or the effects of relativistic aberration. The accuracy is good to 4-5 CCD pixels (16-20 arcsec). For a description of the KML (Keyhole Markup Language), see the Google Earth documentation.

Questions concerning Kepler's science opportunities and open programs, public archive or community tools? Contact us via the email address.
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NASA - National Aeronautics and Space Administration
Editor: Martin Still
NASA Official: Jessie Dotson
Last Updated: Jan 11, 2013
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