Sirius, Mars, Venus naked-eye daylight
Taken by Giorgio Rizzarelli on September 9, 2020 @
Trieste, Italy
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Details:
Yesterday morning I saw Sirius (mag -1.5), Mars (mag -2) and Venus (mag -4) all with naked eye in daylight, after sunrise. Including Moon and Sun the count makes 5. We're having a lucky coincidence of these bodies' favorable periods to do this: Beginning of September for Sirius, one month before opposition for Mars, months when Venus is visible at morning, and this week the waning (morning) Moon phase. Only Jupiter (at mag -2.5, the other planet sometimes visible with naked eye in daylight) is missing, since its current twilight appearance is at sunset. These photos try to convey the feeling and to convince you to try watching by yourself in one of next days. Sirius is the most difficult. A clear dry morning (I had a windy one) is essential (in fact today I tried again but had humidity and missed Sirius). The success also depends on latitude, which makes Sirius more or less extincted in the low sky (I live at 45°N).
Beginning at twilight and using land objects as references (chimneys, gutters, antennas), I tracked with naked eye Sirius until sunrise, Mars until 10mins after, and Venus until 30mins after sunrise. The photos in the composition were shot when I saw the objects.
I added two fisheye photos shot before at twilight (one to give idea of the object positions, the other to include a trail of an International Space Station passage) and a 50mm-focal uncropped (1:1) shot of Sirius.
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