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Sirius

Page history last edited by PBworks 14 years, 1 month ago

Sirius

 

 

Curiosities

The Sirius system emits an unexpectedly high amount of IR radiation -- considered unusual for a binary system.

 

Some ancient observations depict Sirius as being a red star. Astronomically, however, mere thousands of years simply aren't long enough for a red giant to cast off it's outer layers and leave the white dwarf currently present.

 

Sirius C?

Due to slight perturbations in the orbit of Sirius B, an additional, unseen companion to either Sirius A or Sirius B is suspected. No definitive evidence has been found yet.

 

 

 

 

Appendix: Stellar Data

Age: 300 Million Years

Metallicity: 190% Sun

Distance from Sun: 8.601 Light Years

Sirius A

Blue/White Main Sequence Dwarf Star

235% Solar Mass

2261% Solar Luminosity

203% Solar Diameter

Surface Temperature: 9900K

Est. Comfort Zone: 4.755 AU

Sirius B

White Dwarf Star

Semimajor axis: 19.78 AU

98% Solar Mass

0.24% Solar Luminosity

2.2% Solar Diameter

Surface Temperature: 25200K

Est. Comfort Zone: 0.0505 AU

Notes: One of the most massive white dwarfs known (comparable in volume to Earth). Has already evolved off the main sequence, and has probably been through a red giant stage.

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