magnitude Comparison Table

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magnitude comparison table

Subject has definition

absolute magnitude The absolute magnitude (g) of a solar-system body such as an asteroid is defined as the brightness at zero phase angle when the object is 1 AU from the Sun and 1 AU from the observer.

apparent magnitude Measure of the observed brightness of a celestial object as seen from the Earth. It is a function of the star's intrinsic brightness, its distance from the observer, and the amount of absorption by interstellar matter between the star and the observer. The m_v, of Sun, -26.5 mag. A sixth-magnitude star is just barely visible to the naked eye.

Subject	has definition
absolute magnitude	The absolute magnitude (g) of a solar-system body such as an asteroid is defined as the brightness at zero phase angle when the object is 1 AU from the Sun and 1 AU from the observer.
apparent magnitude	Measure of the observed brightness of a celestial object as seen from the Earth. It is a function of the star's intrinsic brightness, its distance from the observer, and the amount of absorption by interstellar matter between the star and the observer. The m_v, of Sun, -26.5 mag. A sixth-magnitude star is just barely visible to the naked eye.

Next radiation measurement: spectral feature Up: radiation measurement Previous radiation measurement: luminosity