Photographic magnitude

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

Photographic magnitude (mph or mp ) is a measure of the relative brightness of a star or other astronomical object as imaged on a photographic film emulsion with a camera attached to a telescope.

Excerpt from the Wikipedia article “Photographic magnitude”, under the CC BY-SA 4.0 license. Read the article on Wikipedia