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Magister
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What is the meaning of: "the apparent magnitude of a star is obtain with a system of 3 stars"?
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Apparent magnitude is a measure of the brightness of a celestial object as seen from Earth. It is based on the amount of light that reaches the observer's eye and is affected by factors such as distance, size, and intrinsic brightness of the object.
Apparent magnitude is measured on a logarithmic scale, with lower numbers indicating brighter objects and higher numbers indicating dimmer objects. Each decrease in magnitude by 1 corresponds to an increase in brightness by a factor of 2.5.
A negative apparent magnitude indicates that the object is extremely bright, with the brightest objects having magnitudes as low as -26.74 (such as the sun). It is important to note that negative magnitudes are only used for the brightest objects and not all objects have negative magnitudes.
Apparent magnitude is a measure of an object's brightness as seen from Earth, while absolute magnitude is a measure of its intrinsic brightness. Absolute magnitude takes into account distance, so two objects with the same absolute magnitude may have different apparent magnitudes if they are at different distances from Earth.
In a 3 star system, the apparent magnitude will depend on the combined brightness of all three stars. If all three stars have similar magnitudes, the combined apparent magnitude will be brighter than a single star. However, if one star is significantly brighter than the other two, it will have a greater impact on the overall apparent magnitude of the system.