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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.

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) :



© Isaac Newton Group of Telescopes
Developed by Chris Benn



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