La Palma sky-brightness calculator
Solar activity (0 - 1):
Enter a value between 0 (solar minimum) and 1 (solar maximum).
Recent solar minima were in 1976.8, 1986.8, 1996.5, ~ 2009.5.
Ecliptic latitude (deg):
Galactic latitude (deg) :
Airmass (1.0 for zenith):
Phase angle of moon :
0 = full, 90 = 7-day-old moon, 180 = new moon, -1 for no moon
Zenith distance of moon [that of target area is given by airmass] (deg) :
Angular distance from moon (deg) :
Extinction (mag/airmass) :