Deimos & Phobos (erdmanpe)

Contains: Solar system body or event

Deimos & Phobos

Revision title: annotated & cropped

Deimos & Phobos

Revision title: annotated & cropped

A not very terrific image of Deimos and Phobos from 5-28-16, but the best I've been able to do over a number of nights of trying. The two little smudges in the lower left quadrant between the diffraction spikes. North is up, East to the left. Phobos inboard, Deimos outboard. Phobos was at its maximum Eastern elongation at the time of the image. Deimos was about 2 hr past its maximum Eastern elongation. Each position is about right according to the Astronomical Almanac chart, including the radial distances. I took 5 sec exposures every 5 min and could watch Phobos come out of the glare and then back in over the course of an hour or so, pretty much centered on the predicted time of max elongation. This is a single exposure of that sequence, somewhat optimizing both moons' visibility.

A single image with a log stretch of the limited data to attempt making Phobos more visible in the glare (Mars is very well saturated). Seeing was rather poor, elongating the stars at ~0.1 arc sec/pixel. TeleVue "Big Barlow" operating at approximately 2.4X, yielding a focal length of ~10m, no filters. I borrowed the ML8050 camera to take advantage of its smaller pixels (5.5micron) compared to what I usually use.

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Title: annotated & cropped

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Revision title: annotated & cropped

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