FAQ:  Why doesn’t the sun look like it is setting in the center of the channel on the day  that th...
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David Roseman August 8, 2012 PowerPoint PPT Presentation


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FAQ: Why doesn’t the sun look like it is setting in the center of the channel on the day that the PYC celebrates Sunset Down the Channel? Answer: It’s all a matter of your perspective. David Roseman August 8, 2012.

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David Roseman August 8, 2012

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David roseman august 8 2012

FAQ: Why doesn’t the sun look like it is setting in the center of the channel on the day that the PYC celebrates Sunset Down the Channel?

Answer: It’s all a matter of your perspective.

David Roseman

August 8, 2012


David roseman august 8 2012

The sun is so far away that, for all practical purposes, its rays are parallel

The bearing of the channel is about 293.6 degrees true

The Sunset Down the Channel date is selected as the date when the sun sets at about 293.6


David roseman august 8 2012

Assume three people observing the sunset on August 6, 2012. One is standing on the east end of the north pier, the second is standing on the east end of the south pier, and the third is standing at the SW corner of the PYC property.


David roseman august 8 2012

With some help from Google Earth…

1. Look!! The sun is setting at the North pierhead!

2. No!! The sun is setting at the South pierhead!

3. Actually, the sun is setting down the center of the channel


David roseman august 8 2012

The centerline view

August 6, 2012

The 15' Boston Whaler Summer Visit cruises inbound. Aboard are Kim, Jennifer, Katelyn and Lacey Jacobs, and (Granddad)David Roseman.Photo by Rilla and Joe Nameth, setup by David Roseman.


David roseman august 8 2012

So…

Almost all of the PYC property is north of the centerline. If you are sitting in a blue chair on the PYC deck, or anywhere else on PYC property north of the centerline, the sun will appear to be setting north of the channel.

Perhaps we should calculate the angles for each deck chair, and celebrate for many days.


David roseman august 8 2012

For more information, visit

http://pentwateryachtclub.com/sunset/sunset_calculations_2012.htm

Errors or comments to [email protected]


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