Script to calculate the temperature and luminosity of the stars.

You should know: - spectral type in number (see the conversion table below), - extinction, - distance, - V or J magnitude of the star.

Use the standard values, like Kenyon and Hartamann 1995.

For information to estimate the spectral type, can see this web page: http://www.cida.gob.ve/~hernandj/SPTclass/sptclass.html

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Conversion table of spectral type

SPT ---> NSPT

B ---> 20

A ---> 30

F ---> 40

G ---> 50

K0 ---> 60

K5 ---> 65

K6 ---> 66

K7 ---> 67

M0 ---> 68

M1 ---> 69

M2 ---> 70

M3 ---> 71