Astronomical Sky Quality. Measurement of the atmospheric transparency.

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The Limiting Magnitude (LM) is a value used in visual observation to obtain an estimation of the sky quality. It is defined as the magnitude of the dullest star that the observer can perceive with his naked eyes. The LM changes depending on the light pollution and the state of the atmosphere. Even for the same place and time, Lm values may be different corresponding to different directions in the sky.

START:
11 November, 2015
DURATION:
Unlimited
ID:
AC-18

Three methods are proposed to compare the sky quality in different places, which depends on:

1 .- Light pollution.

2.- Place conditions (weather and turbulence).

3.- Height of the point in the sky we measure, closely related to the air mass.

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