In theory, the longest lunar eclipse can be witnessed human duration 107 minutes. To achieve such a record, the moon must pass exactly at the middle point of the central umbra.
At this time a lunar eclipse, the moon passes slightly deviated from this point so that the differences are the duration of the eclipse for 7 minutes from the record that might occur. "However, this difference is very thin, making the event this time as a long duration eclipse," said Deputy Science Assessmentof Aerospace Information National Space Research Institute, Thomas Djamaluddin, told Tempo last Monday.
According to records, there are three times the total lunar eclipse-length in the last century, namely on July 16, 1935, lasted 101 minutes; July 6, 1982, lasted 107 minutes and 16 July 2000, lasted 107 minutes.
Of the three long duration eclipse, Indonesia visited only once, namely in 2000. Opportunity next long duration eclipse can be witnessed just seven years longer, on July 27, 2018.
During the 110 minutes was in the umbra, the moon does not disappear altogether. The light scattered by the sun still had time to thin the Earth's atmosphere.
Distribution is mostly scatter light red color that makes the full moon which usually emit a silvery white glow red. Bright moonlight that day was a sudden decrease in the full moon phase 10-100 thousand times in just a few hours.
However, Thomas warned that a total lunar eclipse is not always in accordance with experience. Aerosol contained in the atmosphere will determine the color of the moon.
At this time a lunar eclipse, the moon passes slightly deviated from this point so that the differences are the duration of the eclipse for 7 minutes from the record that might occur. "However, this difference is very thin, making the event this time as a long duration eclipse," said Deputy Science Assessmentof Aerospace Information National Space Research Institute, Thomas Djamaluddin, told Tempo last Monday.
According to records, there are three times the total lunar eclipse-length in the last century, namely on July 16, 1935, lasted 101 minutes; July 6, 1982, lasted 107 minutes and 16 July 2000, lasted 107 minutes.
Of the three long duration eclipse, Indonesia visited only once, namely in 2000. Opportunity next long duration eclipse can be witnessed just seven years longer, on July 27, 2018.
During the 110 minutes was in the umbra, the moon does not disappear altogether. The light scattered by the sun still had time to thin the Earth's atmosphere.
Distribution is mostly scatter light red color that makes the full moon which usually emit a silvery white glow red. Bright moonlight that day was a sudden decrease in the full moon phase 10-100 thousand times in just a few hours.
However, Thomas warned that a total lunar eclipse is not always in accordance with experience. Aerosol contained in the atmosphere will determine the color of the moon.
He pointed out the total lunar eclipse that occurred nearly two centuries ago after the eruption of Mount Tambora. At that time, Tambora ash spread across the surface of the atmosphere, polluting the air that surrounds Earth.
"As a result, when a total eclipse, the moon is really dark out of sight," he said. "Total eclipse the moon is always a surprise. So, let's see what kind of color," he said.
The color of the moon during an eclipse can vary from black, dark red, brick red, red to brown, even orange. Australian astronomers suspect volcanic ash will make a total lunar eclipse is more red in color.
Astronomers from Canberra, Paul Floyd, said the total lunar eclipse is usually orange or red because the Earth's atmosphere acts like a weak lens which brings light from the sun into the shadows. However, this year's eclipse is likely to be more red than usual because there is ash emitted into Earth's atmosphere from the eruption of volcanoes in Chile and Iceland.
"Eclipse has the potential to be very red, not just orange, but we will not know until it happens," said Floyd.
To observe the eclipse, Thomas recommends people use the naked eye for all stages of the eclipse can be seen. If you need aids, Thomas recommends the use of binoculars so that the moon appear larger.
The use of the telescope is not recommended because it makes a narrow field of view so it is not the whole dish in sight.
According to Director of Bosscha Observatory, Judge L. Idle, a total lunar eclipsethis time came at the right time. "Indonesia is entering a dry season so that the possibility of clear sky is very big," he said.
Based on the experience of the stars in the telescoped Judge Bosscha Observatory, after the early morning sky free of cloud interference. Characteristics of this weather is highly dependent on geographical conditions of each region. Therefore, people can recognize patterns in their home before the weather observing a total lunar eclipse.
In rural areas, a total lunar eclipse will look more beautiful. A moment after the moon is hidden behind the umbra, appears bright white clouds stretching from the southwest to the north. White Cloud is the Milky Way, where bermukimnya 200 billion stars, including the sun.
"As a result, when a total eclipse, the moon is really dark out of sight," he said. "Total eclipse the moon is always a surprise. So, let's see what kind of color," he said.
The color of the moon during an eclipse can vary from black, dark red, brick red, red to brown, even orange. Australian astronomers suspect volcanic ash will make a total lunar eclipse is more red in color.
Astronomers from Canberra, Paul Floyd, said the total lunar eclipse is usually orange or red because the Earth's atmosphere acts like a weak lens which brings light from the sun into the shadows. However, this year's eclipse is likely to be more red than usual because there is ash emitted into Earth's atmosphere from the eruption of volcanoes in Chile and Iceland.
"Eclipse has the potential to be very red, not just orange, but we will not know until it happens," said Floyd.
To observe the eclipse, Thomas recommends people use the naked eye for all stages of the eclipse can be seen. If you need aids, Thomas recommends the use of binoculars so that the moon appear larger.
The use of the telescope is not recommended because it makes a narrow field of view so it is not the whole dish in sight.
According to Director of Bosscha Observatory, Judge L. Idle, a total lunar eclipsethis time came at the right time. "Indonesia is entering a dry season so that the possibility of clear sky is very big," he said.
Based on the experience of the stars in the telescoped Judge Bosscha Observatory, after the early morning sky free of cloud interference. Characteristics of this weather is highly dependent on geographical conditions of each region. Therefore, people can recognize patterns in their home before the weather observing a total lunar eclipse.
In rural areas, a total lunar eclipse will look more beautiful. A moment after the moon is hidden behind the umbra, appears bright white clouds stretching from the southwest to the north. White Cloud is the Milky Way, where bermukimnya 200 billion stars, including the sun.
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