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SES Exposure Time Calculator (ETC)
SES Exposure Time Calculator (ETC)
V mag:
Spectral type:
G2V
O
B0
B5
A0
A5
F0
F5
G0
G5
K0
K5
M0
M5
M8
Airmass:
FWHM (arcsec):
Exposure time (s):
S/N@Hα: