Saturday, August 26, 2017

The 2017 Eclipse from Connecticut

The 2017 Eclipse from Connecticut

On August 21 the United States experience a total eclipse that went across America. Here in Connecticut we only experience a 73 % eclipse, but that was enough to measure some of the effects in changes in temperature and luminosity.
The idea is that temperature changes reflect the eclipse, so by recording the event I would be  able to get a record of that change in temperature and luminosity. According to the reports before the eclipse the temperature would low as the sun gets covered by the moon.
Using Hobo Probes, I was able to record the event by taking reading every 5 minutes. Temperature was measured in Fahrenheit and luminosity in Lumens. I chose to use 5 probes to be able to correlate the differences between probes and as a quality control element for the experiment. All probes were hang on plain sunlight on a large field about 6 inches each from each other. See picture.


Hobo Probes produces a graph of the event. Here I only show one graph as a example. Hobo probe #2.1. Black line is Temperature and Blue line is light intensity. It is clear that during the eclipse temperature went down together with luminosity.

Here is a summary of the data recorded by using all the 5 probes:
Sample # Minutes Max Temp Min Temp Difference Max Light Min Light Difference Start time End time
1.1 128 92.92 81.09 11.83 4352 1344 3008 1:35 3:44
2.1 130 93.87 81.09 12.78 3968 1152 2816 1:35 3:46
3.1 129 94.44 81.26 13.18 4352 1280 3072 1:36 3:45
4.1 129 93.49 81.09 12.4 4608 1152 3456 1:36 3:45
5.1 129 93.49 81.09 12.4 4608 1344 3264 1:35 3:45

All 5 probes provided me with similar results. There was a difference of 12.51 degrees Fahrenheit  change form the initiation of the eclipse to the maximum eclipse. In terms of luminosity the was a 3123 lumen difference from the beginning of the eclipse and the maximum eclipse.

Stats of the results:
Stats for the 5 Probes
Temperature (F) Light(Lum)
Max 94.44 4608
Min 81.09 1152
Avg Max 93.642 4377.6
Avg Min 81.124 1254.4
Avg D Change 12.518 3123.2

Apparently there is no question that there is a change in temperature and luminosity in an eclipse. It would have been more drastic if the experiment was conducted within the path of the total eclipse but that will be next time.