Astrophysics (Index)About

exposure time calculator

(ETC)
(app to calculate time to carry out an observation)

An exposure time calculator (ETC) is a type of software application (often web-based) to calculate the necessary time to make an observation for photography or spectrography, generally oriented to a particular telescope. Generally they allow entry of a number of parameters (e.g., magnitude, passband) and yield information on setting up and using the telescope for the observation, naturally including the necessary exposure time.


(telescopes,software type)
Further reading:
https://www.eso.org/observing/etc/

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