S-Type Binary Star System

A P-type binary star system has two stars that orbit close to each other, and the system orbits around that.  An S-type system, on the other hand, is two stars that orbit at some distance from each other, and thus may each have their own system.  I’m going to place such a system in my world, each with it’s own set of planets.

Unlike in the P-type system, where you calculate the stars as though they were one entity, in the S-type you treat them separately.  Thus, my results:

Primary Star Secondary Star
Property Calculation Calculation
Mass 1.21 0.75
Luminosity 1.95 0.37
Diameter 0.90 0.56
Surface Temperature 1.10 0.86
Lifetime 0.62 2.05
Distance to Barycenter 153.06 246.94
Eccentricity 0.40 0.50
Maximum Separation from Barycenter 560.00 600.00
Minimum Separation from Barycenter 240.00 200.00
System
Maximum Separation 1,160.00
Minimum Separation 440.00
Inner Limit 0.12 0.08
Outer Limit 48.40 30.00
Frost Line 6.77 2.93
Habitable Zone 1.40 0.60
Minimum Habitable Zone 1.33 0.57
Maximum Habitable Zone 1.91 0.83
Forbidden Zone Edge 146.67

The forbidden zone edge is important.  The outer limits of each system need to fall well inside the forbidden zone to prevent the stars from interfering in each other’s system.  Looks like we are good there, with stars still close enough to be significant in each other’s sky.

We can then lay out the first system like so:

Primary System Orbit In Kilometers
Orbit 1 0.17 24928024.98
Orbit 2 0.29 44122604.21
Orbit 3 0.58 86921530.29
Orbit 4 0.86 128643864.8
Habitable Planet 1.59 237991149.9
Orbit 6 2.37 354606813.4
Orbit 7 4.53 677299013.6
Biggest Gas Giant 7.38 1103997392
Orbit 9 12.32 1843675645
Orbit 10 17.87 2673329685
Orbit 11 29.49 4410993980
Orbit 12 47.18 7057590369

And the second system as:

Secondary System Orbit In Kilometers
Orbit 1 0.10 14766732.9
Orbit 2 0.14 21559430.04
Orbit 3 0.20 30614390.66
Orbit 4 0.39 59085773.97
Habitable Planet 0.72 108126966.4
Orbit 6 1.08 161109179.9
Orbit 7 1.76 262607963.2
Biggest Gas Giant 2.93 438555298.6
Orbit 9 5.39 806941749.3
Orbit 10 8.20 1226551459
Orbit 11 16.15 2416306374
Orbit 12 25.36 3793601008

This system is actually going to form the core of the worlds controlled by the dominant system race.  While humans will exist in this setting, they will not be the dominant race and will, in fact, not be native to this section of the galaxy.  The dominant race originated on the habitable planet in the primary system, and later spread through that system and into the secondary system, where they encountered the much less developed race on the habitable planet there and promptly enslaved them.

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