Jupiter and Mercury Amid the Clouds



One of the rules of astrophotography is that clouds always position themselves right over the objects you are trying to shoot. When the subject in question is a pair of planets, then a cloud will always cover one or the other planet, making it impossible to capture both at once and therefore record the conjunction.

Tonight, March 15, I chased out west of Calgary to get the conjunction of Mercury and Jupiter over the scenic skyline of the Rockies. Of course, clouds drifted slo-0-0-0-w-ly across the sky. But with a little patience (and I do have very little to spare in situations like this!) I was able to catch a few moments when both Jupiter (at left here) and Mercury (upper right) shone in view amid the clouds.

The highway (Highway 66 to Bragg Creek) adds a nice touch, with cars seeming to come and go from the distant planets.

Again, as with the previous night’s shot, this is a “high dynamic range” stack of three shots taken in quick succession but with EV values 1 1/3rd f-stops apart, to retain both ground and sky detail in an inherently contrasty situation. Photoshop CS5’s HDR Pro feature does a great job. This is with the Canon 7D and 135mm lens.

– Alan, March 15, 2011 / Image © 2011 Alan Dyer

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