V-band photon count=52
band center: .55 um, band width: .09 um, F0=3.75E-8 W/m^2 um

* ? 52*h*c/.55e-6/(pi/4*.3^2*.09*2)
    .1476088794546518E-14
* ? -2.5*log10(res/3.75e-8)
    18.51229696086314    !V mab

B-band photon count=39
band center: .44 um, band width: .1 um, F0=6.4E-8 W/m^2 um

* ? 39*h*c/.44e-6/(pi/4*.3^2*.1*2)
    .1245449920398624E-14
* ? -2.5*log10(res/6.4e-8)
    19.27713426190586    !B mag

* ? res-18.51229696086314    
    .7648373010427214    !(B-V)
* ? 1700/(res+.36)+5060-1600*res
    5347.589999899020    !K

---
median lambda=1.22095e-6
median: x=2.35676=h (median-nu)/kT = hc/(k T median-lambda)
T=hc/(k*2.35676*1.22095e-6)

* ? h*c/(kb*2.35676*1.22095e-6)
    5000.119176344443