Kostenloser Telescope Resolution Rechner
Berechnen Sie den angular resolution of a telescope. Dawes und Rayleigh limits. Kostenloser telescope Rechner.
Dawes Limit
0.580 arcsec
Dawes Limit vs Aperture Diameter
Formel
## 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.
Lösungsbeispiel
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.
Häufig Gestellte Fragen
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.