ERIC Number: EJ1233096
Record Type: Journal
Publication Date: 2019-Nov
Pages: 3
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0031-921X
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Available Date: N/A
An Image Analysis Method for Calculating the Moon's Orbital Eccentricity
Tref, Vitoria; Bertuola, Alberto C.; Filho, Victo S.
Physics Teacher, v57 n8 p562-564 Nov 2019
In this work we describe a teaching proposal to calculate the eccentricity of the Moon's trajectory by applying a geometrical technique. The values of the ratios between the Earth-Moon distance and the diameter of the Moon at apogee and at perigee were calculated from a kinematic model associated with a geometrical technique of image analysis. The experimental data were collected from two videos of the Moon's movement in positions close to the apogee and perigee. We chose two frames of both videos, and by means of image analysis we obtained a geometrical parameter for each video and by means of a kinematic model we defined a physical parameter. Then, by combining both parameters we calculated the maximal and minimum apparent diameters, which were used to calculate the eccentricity. Finally, we compared our results with values of literature.
Descriptors: Physics, Science Instruction, Earth Science, Geometry, Video Technology, Teaching Methods, Comparative Analysis, Measurement, Proximity
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://aapt.scitation.org/journal/pte
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
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