2R_{A} + 2R_{B} ≃ 4R_{A} = (Δt) ∗ (v_{A} + v_{B}) ≃ (Δt) ∗ (2v_{A})

R_{A} ≃ \frac{(Δt) ∗ (v_{A})}{2}

L_{bolometric} = 4πR^{2} σT^{4}

M_{HV} = M_{⊙} − 2.5 log_{10} (\frac{L_{HV}}{L_{⊙}} ) _{but watch out}

M_{HV} = M_{⊙} − 2.5 log_{10} (\frac{L_{HV}}{L_{⊙}} ) − BC