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Jupiter & Saturn in Twilight with Closeup Inset (Dec 22, 2020).jpg

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The pairing of Jupiter and Saturn in the evening twilight, the day after their closest conjunction, taken here on December 22, 2020. This was from home, as a snowstorm in the previous 24 hours had made the roads too poor to travel.

Brighter Jupiter is to the left of Saturn and is pulling away from Saturn here, but they were still separated by only 10 arc minutes this evening. The inset shows the view through a telescope with the Galilean moons of Jupiter visible and three of the moons of Saturn. Other points are field stars.

The background image is a stack of 6 untracked exposures to smooth the motion of the clouds, but the planets come from just one of the exposures, all being 0.8-second shots with the 85mm Rokinon lens at f/4 and with the Canon 6D MkII at ISO 200.

The closeup image is a stack of six 4-second exposures (to bring out the moons) taken about 5:45 pm local MST. All were through the Celestron SE6 Schmidt-Cassegrain at f/10 (so 1500mm focal length) on the Sky-Watcher EQM-35 mount tracking the sky but only roughly polar aligned, and through the Canon EOS Ra camera at ISO 800, and cropped in. The planets' low altitude blurred their images from poor seeing. Atmospheric dispersion adds to colour fringing.
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The pairing of Jupiter and Saturn in the evening twilight, the day after their closest conjunction, taken here on December 22, 2020. This was from home, as a snowstorm in the previous 24 hours had made the roads too poor to travel. <br /> <br /> Brighter Jupiter is to the left of Saturn and is pulling away from Saturn here, but they were still separated by only 10 arc minutes this evening. The inset shows the view through a telescope with the Galilean moons of Jupiter visible and three of the moons of Saturn. Other points are field stars. <br /> <br /> The background image is a stack of 6 untracked exposures to smooth the motion of the clouds, but the planets come from just one of the exposures, all being 0.8-second shots with the 85mm Rokinon lens at f/4 and with the Canon 6D MkII at ISO 200. <br /> <br /> The closeup image is a stack of six 4-second exposures (to bring out the moons) taken about 5:45 pm local MST. All were through the Celestron SE6 Schmidt-Cassegrain at f/10 (so 1500mm focal length) on the Sky-Watcher EQM-35 mount tracking the sky but only roughly polar aligned, and through the Canon EOS Ra camera at ISO 800, and cropped in. The planets' low altitude blurred their images from poor seeing. Atmospheric dispersion adds to colour fringing.