limiting magnitude


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limiting magnitude

The faintest apparent magnitude that may be observed through a telescope and/or recorded on a photographic plate or other device. It depends on the telescope aperture, on the sensitivity of the recording device, on atmospheric conditions, etc. Star catalogs usually list stars down to a specific limiting magnitude.
References in periodicals archive ?
After a few quick calculations, Albers said that the limiting magnitude at that altitude in daylight should be about 4th magnitude.
The brightness of the faintest star that can be seen on a given night, is the limiting magnitude.
It is readily visible when the limiting magnitude is +5.
Figure 2 shows how the limiting magnitude changes with focal ratio for a given focal length.
Koos observed up to 3/hr under limiting magnitude (LM) = 5.
A total of 132 limiting magnitude observations recorded on clear nights were compiled and plotted on maps of the tri-county area using Geographic Information Systems software.
You can see it as a soft little hazy patch of light on the west side of the Keystone asterism in Hercules -under skies with a limiting magnitude of about 6.
The star chart below can be used for checking the limiting magnitude around the south celestial pole with the naked eye.
Observers are reminded to carefully record the observing conditions and the stellar limiting magnitude, and should also bear in mind the nightly eastwards 'drift' of the Perseid radiant due to Earth's orbital motion.
It was a perfectly clear night with excellent seeing conditions and exceptional transparency with a limiting magnitude of 6.
A limiting magnitude was obtained from each observation.