Physics 121 Topics: Course announcements Quiz Gravitation: Review Orbital Motion Kepler’s Laws.
Orbital Motion Sirius A and Sirius B
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![Page 1: Orbital Motion Sirius A and Sirius B](https://reader030.fdocuments.net/reader030/viewer/2022032612/568132aa550346895d995105/html5/thumbnails/1.jpg)
Orbital Motion
Sirius A and Sirius B
Sirius A Sirius A
Center of mass
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Orbital Motion Sirius A and Sirius B
Sirius A Sirius A
Center of mass
Orbital plane (looking perpendicular to the orbital plane along the red arrow)
Orbital plane (looking at an angle)
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Orbital Motion Sirius A and Sirius B
Sirius A Sirius A
Center of mass
0 31 62 93 124
arc-seconds
Plane of the Sky
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Sirius A on the sky
Sirius A and B in space
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1855
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1860
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1865
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1870
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The "center of mass" will remain fixed in the following slides.
Watch the orbits carefully.
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1885
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1900
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1905
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1910
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1915
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1920
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1925
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1930
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1935
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1940
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1945
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1950
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1955
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Search for Companions Around SiriusJ.M. Bonnet-Bidaud , F. Colas and J. Lecacheux Astronomy and Astrophysics v360, 991-996 (2000)
4 arc-minutesor 1/15 degree
W
North
E