apparent brightness


apparent brightness
The brightness of a star as measured by an observer, as opposed to its intrinsic brightness when corrected for distance or absorption.

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  • Apparent magnitude — Asteroid 65 Cybele and 2 stars with their magnitudes labeled The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere.… …   Wikipedia

  • apparent magnitude — noun : the observed or apparent brightness of a celestial body expressed on the magnitude scale and varying in accordance with the spectral sensitivity of the means of observing (as the eye, a photographic material, or an instrument) * * *… …   Useful english dictionary

  • Brightness — is an attribute of visual perception in which a source appears to emit or reflect a given amount of light. In other words, brightness is the perception elicited by the luminance of a visual target. This is a subjective attribute/property of an… …   Wikipedia

  • apparent diameter — Magnitude Mag ni*tude, n. [L. magnitudo, from magnus great. See {Master}, and cf. {Maxim}.] 1. Extent of dimensions; size; applied to things that have length, breadth, and thickness. [1913 Webster] Conceive those particles of bodies to be so… …   The Collaborative International Dictionary of English

  • Apparent magnitude — Magnitude Mag ni*tude, n. [L. magnitudo, from magnus great. See {Master}, and cf. {Maxim}.] 1. Extent of dimensions; size; applied to things that have length, breadth, and thickness. [1913 Webster] Conceive those particles of bodies to be so… …   The Collaborative International Dictionary of English

  • apparent magnitude — Magnitude Mag ni*tude, n. [L. magnitudo, from magnus great. See {Master}, and cf. {Maxim}.] 1. Extent of dimensions; size; applied to things that have length, breadth, and thickness. [1913 Webster] Conceive those particles of bodies to be so… …   The Collaborative International Dictionary of English

  • apparent — adj. 1 readily visible or perceivable. 2 seeming. Phrases and idioms: apparent horizon see HORIZON 1b. apparent magnitude the magnitude, i.e. brightness, of a celestial body as seen from the earth (opp. absolute magnitude). apparent time solar… …   Useful english dictionary

  • apparent magnitude — noun a numerical measure of the brightness of a star, planet etc.; a decrease of 1 unit represents an increase in the light received by a factor of 2.512 See Also …   Wiktionary

  • Apparent Magnitude —    The observed brightness of a star …   The writer's dictionary of science fiction, fantasy, horror and mythology

  • Intrinsic brightness — Astronomers use the term intrinsic brightness (also termed absolute magnitude) to refer to how bright a star would be without the effects of distance or absorption due to interstellar dust or gas. While a bright distant star might have apparent… …   Wikipedia


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