1. Authors ：Yuanlei Zou,Zhensen Wu
2019/5/13
The Distribution of the Zodiacal Light Brightness Varying with Time in the Geocentric Ecliptic Coordinate
Authors ：Yuanlei Zou,Zhensen Wu
Science School, Xidian University
Xi’an , China
2019/5/13

2. Outline of the Presentation
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Outline of the Presentation
Introduction
The T.Kelsall model
The Earth’s situation in space
Results and Analysis
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3. Introduction The zodiacal light phenomena observed in the Erath:
Figure 1
Figure 2
The zodiacal light is observed in La Silla , Chile by
Y.Beletsky/EOS(Time:2009.9,sunset)
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4. Introduction
Shape: The zodiacal light is a big triangle of bright area in shape, and becomes dark toward deep sky. It’s commonly observed in annual spring and autumn in the middle latitude of the Earth.
Explain: The zodiacal light exists briefly in infrared bands and visual bands. It’s caused by the action between the interplanetary dust (IPD) and the sunshine
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5. 2.The T.Kelsall model i A C D B O 1
Figure 3
Figure 4
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6. 2.The T.Kelsall model There exist relationship in the formula:
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7. 3.The Earth’s situation in space
make sure the Earth’s position by time
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8. Results and Analysis the Earth’s position varies with time Figure 5
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9. 2.Results and Analysis
The zodiacal light brightness distribution in at wavelength
Figure 7. The zodiacal light brightness’s distribution on
Figure 8. The zodiacal light brightness’s distribution on
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10. Results and Analysis The zodiacal brightness varies with time t
Figure 10
Figure 9
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Figure 12
Figure 11

11. Results and Analysis
Conclusion 1: After the position is submitted into the T.Kelsall model ,it can be obtained that the distribution of the brightness of the zodiacal light on a given date in the geocentric ecliptic coordinate.
Conclusion 2: The zodiacal brightness varying with the observed time is caused by the Earth’s orbit change.
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12. Thank you !!!
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