Stellar design notes

Space Opera's discretionary design of planets left me wanting more information about reasonable values for things like ecosphere and, therefore, oribtal distance and so on. I went looking and found some information in a book on astronomy which I condensed down into this table:

Spectrum

of Star

(Class)

Adopted

Temperature

in Kelvin

Max

Ecosphere

Optimum

in LS

Min

B0

23,000

1072

979

876

B5

15,000

 866

790

707

A0

11,000

 742

677

606

A5

 8,600

 655

599

535

F0

 7,400

 608

555

497

F5

 6,500

 570

520

465

giant G0

 5,600

 529

483

432

giant G5

 4,700

 484

443

396

giant K5

 4,200

 458

418

374

giant M2

 3,400

 412

376

337

giant M5

 3,100

 394

359

321

N

 2,700

 360

329

294

Me(max).

 2,600

 339

310

277

Me(min).

 2,300

 287

262

235

dwarf G0

 6,000

 548

500

447

dwarf G5

 5,600

 529

483

432

dwarf K9

 5,100

 505

461

412

dwarf K5

 4,400

 469

428

383

dwarf M

 3,400

 412

376

337

The Math Used:
I did this chart many years ago, when I was in high school, so I make no claims as to the realism of the methods used. However, at least they do give consistent results, so for a game they may well be good enough.

Anyway, assume that Earth is at the optimum stellar distance around a dG0 star. Therefore, the Optimum Stellar Ecosphere (OSE) can be calculated as follows:
OSE=6000K/(500LS)Ù2, this is simply a coefficient and is based on the idea that the temperature of the star is proportional to the radiation emitted and falls off as the square of the distance. Your mileage may vary.
If we solve the equation, we find the OSE coefficient is .024K/LSÙ2

Thus the actual Optimum Stellar Ecosphere distance in LS is the square root of the Temperature of the star divided by the coefficient:
Ö(T/0.024)

Somehow, I decided to calculate the maximum and minimum SE coefficients by using the temperatures of dK0 and F0 stars This gives results of .020 and .030, which can be plugged into the above formula to determine the maximum and minimum ecospheres.

Example:
For a type M dwarf star, with a temperature of 3,400K,
OSE = Ö(3400/.024) = Ö(141,666.67)=376
MxSE = Ö(3400/.020) = Ö(170,000) = 412
MnSE = Ö(3400/.030) = Ö(113,333.33) = 337