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Epsilon Lyrae 1 / Epsilon Lyrae 2 (A-D) (Apr 17, 2004)
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| Type: |
Main sequence star (Class A3) /
Main sequence star (Class A7) / Main sequence star (Class A5) / Main sequence star (Class A5) |
| Brightness: |
5.1 mag / 6.0 mag / 5.1 mag / 5.4 mag
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| Visual Distance (Separation): |
208'' / 2,8" / 2,2"
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| Distance: |
160 ly
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| Colour: |
white
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| Luminosity (Sun = 1): |
18 x / 8 x / 17 x / 14 x
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| Mass (Sun = 1): |
1.9 x / 1.5 x / 1.9 x / 1.8 x
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| Temperature: |
7,800 / 7,500 / 8,000 / 8,000 degrees
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| Diameter: |
-
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| Notes: | |
| Epsilon Lyrae is a "double-double" star. It takes Epsilon Lyrae 1 and 2 at least half a million years to orbit around each other because they are about 10,000 AU apart. The distance between both double stars must be almost 140 AU and it takes the components about 1000 years to perform a complete turn around their common center of gravity. | |