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USPS Star Calendar for 31 July-6 August 24 July 2011

Posted by amedalen in August 2011, July 2011.
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1 Aug    Low in the west at dusk, Mercury is 4 finger-widths to the moon’s lower right. Tomorrow Mercury begins retrograde motion to the west and soon disappears into the sun’s glow.

2 Aug    The moon is at perigee, 57.35 Earth-radii or 366,000 kilometers away.

3 Aug    About an hour after sunset, look just above the western horizon to see magnitude 0.9 Saturn 4 finger-widths above the moon and magnitude 1.2 Spica 1.5 fist-widths to the upper left. Less than 20 percent of the moon’s surface is illuminated.

4 Aug    Magnitude 1.2 Spica is only 1 finger-width above the moon tonight.

6 Aug    First-quarter moon at 1108 UT

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