Though How many sundials, Sun compasses and gnomons are there on solar system bodies? is as yet unanswered, Wikipedia's https://en.wikipedia.org/wiki/MarsDial currently tells us that only the following three are on Mars:

  • MER-A Spirit
  • MER-B Opportunity
  • MSL Curiosity

Insight has a gnomon of sorts as shown in the linked question (on the seismometer shroud), but perhaps it's not a proper MarsDial.


  1. Does Perseverance have a gnomon on it?
  2. If so, is it of the MarsDial variety?
  3. If so, is it the same as Curiosity's, or has it been upgraded/modified?

MarsDial on Spirit (cropped, zoomed, sharpened)

Source (cropped, zoomed, sharpened)

A true-color image of the MarsDial taken by the Spirit rover. Created using images taken in filters L2, L3, L4, L5, L6 & L7. Images were interpolated into the XYZ colorspace using a spline interpolation of order 3 and then transformed into the sBGR colorspace.

  • Date: 29 July 2014, 18:12:48
  • Source: NASA/JPL/Cornell University

That's gnomon, not gnome!

gnomes Source


Yes. It was shown and described in the NASA press conference at about minute 31:

enter image description here

And here is a close up of the Gnomon from the latest press conference showing much more detail:

enter image description here

  • 2
    $\begingroup$ Hmm simultaneous post as uhoh's edit... Sorry $\endgroup$ – Brian Tompsett - 汤莱恩 Feb 23 at 13:54
  • $\begingroup$ Not any more. Good find!, thanks! $\endgroup$ – uhoh Feb 24 at 1:39

Yes, according to mastcamz.asu.edu . The text there calls it a 'calibration target' but makes it clear that it's a Marsdial chock-full of inscriptions as with Curiosity's Marsdial.

  • $\begingroup$ Sorry to edit ad then roll back, it seems I'd duplicated the other answer at the same time it was posted. $\endgroup$ – uhoh Feb 24 at 1:39
  • 1
    $\begingroup$ @uhoh NP; I appreciate the work in any case $\endgroup$ – Carl Witthoft Feb 24 at 12:36

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