Calculadora de Resolução do Telescópio — Formula

Telescope Angular Resolution

Dawes Limit (empirical, for equal-brightness stars)

theta = 116 / D arcseconds (D in mm)

Rayleigh Criterion (diffraction-limited at 550 nm)

theta = 138 / D arcseconds

Smaller is better. A 200 mm telescope resolves about 0.58 arcsec. Atmospheric seeing typically limits ground-based resolution to about 1-2 arcsec.

Exemplo Resolvido

A 200 mm (8-inch) telescope.

  1. Dawes: 116 / 200 = 0.58 arcsec
  2. Rayleigh: 138 / 200 = 0.69 arcsec
  3. This can split double stars separated by 0.6 arcsec on a steady night.