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Orbital MotionSirius A and Sirius B
Sirius A Sirius B
Centerof mass
Orbital Motion Sirius A and Sirius B
Sirius A Sirius B
Centerof mass
Orbital plane (looking perpendicular tothe orbital plane along the red arrow)
Orbital plane (looking at an angle)
Orbital Motion Sirius A and Sirius B
Sirius A Sirius B
Centerof mass
0 31 62 93 124arc-seconds
Plane of the Sky
Sirius A on the sky
Sirius A and B in space
1850
0 31 62 93 124
arc-seconds
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-6
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1855
0 31 62 93 124
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-6
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1860
0 31 62 93 124
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1865
0 31 62 93 124
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1870
0 31 62 93 124
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1875
0 31 62 93 124
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The "center of mass"will remain fixed in thefollowing slides.
Watch the orbitscarefully.
1880
0 31 62 93 124
arc-seconds
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+6
-6
arc-
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nds
1885
0 31 62 93 124
arc-seconds
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-6
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nds
1890
0 31 62 93 124
arc-seconds
0
+6
-6
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nds
1895
0 31 62 93 124
arc-seconds
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+6
-6
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nds
1900
0 31 62 93 124
arc-seconds
0
+6
-6
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nds
1905
0 31 62 93 124
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0
+6
-6
arc-
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nds
1910
0 31 62 93 124
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0
+6
-6
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nds
1915
0 31 62 93 124
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0
+6
-6
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nds
1920
0 31 62 93 124
arc-seconds
0
+6
-6
arc-
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nds
1925
0 31 62 93 124
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0
+6
-6
arc-
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nds
1930
0 31 62 93 124
arc-seconds
0
+6
-6
arc-
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nds
1935
0 31 62 93 124
arc-seconds
0
+6
-6
arc-
seco
nds
1940
0 31 62 93 124
arc-seconds
0
+6
-6
arc-
seco
nds
1945
0 31 62 93 124
arc-seconds
0
+6
-6
arc-
seco
nds
1950
0 31 62 93 124
arc-seconds
0
+6
-6
arc-
seco
nds
1955
0 31 62 93 124
arc-seconds
0
+6
-6
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nds
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
