Apparent magnitude
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Apparent magnitude is a measure of the brightness of a star, astronomical object or other celestial objects like artificial satellites. Its value depends on its intrinsic luminosity, its distance, and
Asteroid 65 Cybele and two stars in the constellation Aquarius, with their magnitudes labeled
Image of 30 Doradus taken by ESO's VISTA. This nebula has a visual magnitude of 8.
GRB 080319B
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GRB 080319B was a gamma-ray burst detected by the Swift satellite at 06:12 UTC on March 19, 2008. The burst set a new record for the farthest object that was observable with the naked eye: it had a pe
Apparent magnitude
…from scattering and airglow. Apparent visual magnitudes of celestial objects Apparent magnitude (V) Object Seen from... Notes −67.57 gamma-ray burst GRB 080319B seen from 1 AU away would be over 2×1016 (20 quadrillion) times as bright as the Sun when seen from the Earth −43.27 star NGC 2403 V14 seen from 1 AU…
The afterglow of GRB 080319B imaged by Swift's X-ray Telescope (left) and Optical/Ultraviolet Telescope (right)
ESO artist's impression of gamma-ray burst GRB 080319B
Brightness curve for GRB 080319B in optical wavelengths (black curve) and at higher energies (gray)