Antonio Piras

Shown here is the moon Phobos on the eastern horizon shortly after Martian midnight of Sol 785. The several trails, from the rising moon and the setting stars, span exactly 245 seconds (2×120 s exposure + 5 s pause between shots, thanks to Prof. Jim Bell for confirming those numbers). This elaboration required two light and a dark frame (ZR7) from the Right ZCAM.

Although more noisy, the saturated version allows for the appreciation of the colors of red giants Betelgeuse and Aldebaran, as well as a bluish tint from Phobos (possibly due to atmospheric dispersion?).

photo credit: NASA/JPL-Caltech/ASU/Antonio Piras-SardAstro

May 25, 2023

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