29-03-2007, 01:22 PM
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The Glenfallus
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Join Date: Jan 2005
Location: Central Coast, NSW
Posts: 2,702
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Quote:
Originally Posted by ariane
[SIZE="2"][FONT="Book Antiqua"]
This binary period can be simply calculated by;
Period = sqrt (D^3) x (M1 + M2)
Where;
D is the Distance in A.U. and
M1 and M2 are the masses of the two Components.
Separation (max) = 10^(2.8-(0.2 x DeltaM))
Where;
Separation (max) is the likely maximum separation of two stars expressed in arcsec and;
DeltaM is the Difference in Magnitude
True Separation = sin (SO / 3600) * D
Where;
SO is the Observed Separation (in arcsec)
D is the Distance (in Parsecs - pc.)
To convert the True Separation into the units required multiply by;
light-years = 3.2616
AU = 63240
km. = 9.46 x10^12
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Glad it is that simple
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