Activity: Measure the change in Luminosity & Hue during Total Lunar Eclipse using Danjon Scale
BE A PART OF AN ALL INDIA EFFORT TO MEASURE LUMINOSITY CHANGES DURING TOTAL ECLIPSE AND COMPARE RESULTS FROM DIFFERENT LOCATIONS

ACTIVITY: Using the Danjon 5 point scale to measure luminotsiy and hue, observe the Lunar Eclipse at all phases and classify the shadow and hue of the eclipse as observed during the total eclipse.

SUMMARY:
The brightness of the moon varies widely from one eclipse to another. Many factors can affect the appearance of the Moon during a lunar eclipse including the Moon's path through the Earth's umbra, and the current conditions of the Earth's atmosphere. Thus, visual estimates of the colors seen on the totally eclipsed moon and their changes in different phases is valuable.
In the early 20th century, French astronomer André Danjon introduced the five-point scale of lunar luminosity ("L") for classifying the visual appearance and brightness of the Moon during total lunar eclipses.
Compare your visual observation to this chart, and record it for each phase. Report it with your name/location.
L= 0 Very dark eclipse. Moon almost invisible, especially at greatest eclipse.
L = 1 Dark Eclipse, gray or brownish in coloration. Details distinguishable only with difficulty.
L= 2 Deep red or rust-colored eclipse. Very dark central shadow, while outer edge of umbra is relatively bright.
L = 3 Brick-red eclipse. Umbral shadow usually has a bright or yellow rim.
L = 4 Very bright copper-red or orange eclipse. Umbra shadow has a bluish, very bright rim.

Danjon Scale Measurements
About Total Lunar Eclipse
The Total Lunar Eclipse – Blue Micro Moon on July 27, 2018
It’s a scientific observation and celebration of century largest Lunar Eclipse. The Total Lunar eclipse on the intervening night of 27 July and 28 July will last about 103 minutes and be the longest for 21st century. The longest total lunar eclipse of the last century happened in its last year on 16 July 2000. It had lasted nearly four minutes longer, at 1 hour and 46.4 minutes. People in Asia and Africa will get the best views of the eclipse. Those in Europe, South America and Australia will see partial views. It will not be visible in North America and Antarctica. In India, the eclipse will commence at 22:42:48 on 27 July and end at 05:00:05 on 28 July. The alignment of the centers of Sun, the Earth and the Moon, and the distance of the Moon from Earth at the time of eclipse combine to determine its duration. This time the centers of the three celestial bodies are almost in a straight line, and the Moon will be near its farthest point from Earth. Since the moon will be at its most distant, it will be at its smallest. So, it will take more time to cross the Earth’s shadow, making the eclipse last longer.
Participant's Name: *
(Please mention your Full name like Ram Arora)
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Observation Venue: *
(Please Mention Venue/City name from where you have taken the readings. If known, mention Longitude & Latitude of venue also)
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Longitude & Latitude:
(ex: Long: 73.95 & Lat: 65.85)
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City Name *
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Equipment used *
Telescope/binocular/naked eyes. If telescope, give the specfications
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