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Observation of Earth's shadow on Moon craters during the Lunar Eclipse

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Some of the most interesting events to measure during a lunar eclipse are the ingress and egress phases of the Earth's shadow in several lunar craters. The timing of craters is useful in determining the atmospheric enlargement of the Earth's shadow.(See Size and shape of the umbra during a lunar eclipse). The next table lists predicted umbral ingress and egress times for twenty well-defined lunar craters (using 2% umbral enlargement):


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Ingress Time (UT)


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Egress Time (UT)

01:16
Grimaldi
03:52
Aristarchus
01:20
Billy
03:54
Grimaldi
01:27
Kepler
03:58
Plato
01:28
Aristarchus
03:59
Kepler
01:29
Campanus
04:01
Billy
01:35
Copernicus
04:03
Pytheas
01:38
Tycho
04:04
Timocharis
01:38
Pytheas
04:06
Copernicus
01:44
Timocharis
04:07
Aristoteles
01:52
Manilius
04:09
Eudoxus
01:55
Dionysius
04:13
Campanus
01:55
Plato
04:18
Manilius
01:56
Menelaus
04:21
Menelaus
02:00
Plinius
04:23
Tycho
02:03
Eudoxus
04:25
Plinius
02:04
Aristoteles
04:27
Dionysius
02:06
Goclenius
04:34
Proclus
02:10
Taruntius
04:39
Taruntius
02:12
Proclus
04:43
Goclenius
02:13
Langrenus
04:48
Langrenus

From http://sunearth.gsfc.nasa.gov/eclipse/eclipse.html - F. Espenak, NASA/GSFC


We propose you to follow with us this event and with your collaboration we can find a better measure of Earth's shadow's shape for this eclipse. Remember that shadow's shape is different for every eclipse, so we can not lose this opportunity.


It is easy! You only have to measure ingress and egress times of the selected craters. If the crater is large enough, it will be possible to measure the times of starting and ending of the ingress (and egress) and then calculate the average for every ingress (or egress). If the crater is too small then you can take only one measure in the central position of the crater.


The times in the table are only for orientation. But you can use it with the aim of know what will be the next crater in ingress (or egress). Your measures will have some differences because it depends of atmosphere status in that moment.

 
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