Event Date: June 21st
Time: 7:00 PM
Brief
With the summer solstice having passed yesterday, I having been talking alot about the Sun's position relative to the stars, constellations and celestial latitude. For today, I will show a reminder of the Sun's position each evening at the same time. I showed this last season by means of the analemma, for which the local path traces out a figure-8 shape, with one loop appearing larger than the other. Last month, I showed part of that and this time, I will show one-quarter of it; since the March equinox about three months ago.
Time: 7:00 PM
Brief
With the summer solstice having passed yesterday, I having been talking alot about the Sun's position relative to the stars, constellations and celestial latitude. For today, I will show a reminder of the Sun's position each evening at the same time. I showed this last season by means of the analemma, for which the local path traces out a figure-8 shape, with one loop appearing larger than the other. Last month, I showed part of that and this time, I will show one-quarter of it; since the March equinox about three months ago.
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| click on image to enlarge: courtesy of Starry Night Pro Plus, version 6.4.3, by Simulation Curriculum Corp. |
Detailed
The path doesn't seem very long relative to the stretch of azimuth: just south of west to west-northwest. However, this is also because it slows down in moving north each day between the March equinox and June solstice. If I was to show a stretch from mid-February to mid-April, that is only two months as opposed to three, yet the path would be about as long. With the Sun increasing faster in declination during these weeks sandwiching the equinox, we can make sense of that. For this path, notice the plots become closer together as we approached the solstice, which supports what I am referring to with the slowing of declination increase.
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