Calculadora de Resolução do Telescópio
Calcule o poder de resolução angular do seu telescópio.
Dawes Limit
0.580 arcsec
Dawes Limit vs Aperture Diameter
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.
- 01Dawes: 116 / 200 = 0.58 arcsec
- 02Rayleigh: 138 / 200 = 0.69 arcsec
- 03This can split double stars separated by 0.6 arcsec on a steady night.
Perguntas Frequentes
What limits resolution in practice?
Atmospheric seeing (turbulence) typically limits ground resolution to 1-2 arcsec, regardless of telescope size. Adaptive optics or space telescopes overcome this.
What is the Hubble Space Telescope's resolution?
About 0.05 arcsec, thanks to its 2.4 m aperture and no atmospheric blurring.
Does magnification improve resolution?
No. Resolution is set by aperture. Magnification just makes the resolved detail easier to see, up to a point.