Calculadora de Tolerancia de Error de Seguimiento Gratis
Calcula el error de seguimiento máximo permitido para tu configuración de astrofotografía.
Max Periodic Error
1.5400 arcsec
Max Periodic Error vs Worm Period
Fórmula
Tracking Error Tolerance
For unguided astrophotography, the mount's periodic error (PE) must be small enough that stars do not trail beyond the pixel scale.
Formula
PE_max = pixel_scale * drift_pixels
The drift rate limit is PE_max divided by the worm-gear period.
Ejemplo Resuelto
0.77 arcsec/px scale, 2 px acceptable drift, 480 s worm period.
- 01PE_max = 0.77 * 2 = 1.54 arcsec
- 02Drift rate = 1.54 / 480 * 60 = 0.1925 arcsec/min
Preguntas Frecuentes
What is periodic error?
PE is the back-and-forth tracking error caused by imperfections in the mount's worm gear. It repeats every worm cycle (typically 4 to 10 minutes).
How can I reduce PE?
Use periodic error correction (PEC), autoguiding, or a mount with a high-quality worm gear. Belt-driven mounts often have lower PE.
Is autoguiding always necessary?
For long focal lengths or multi-minute exposures, usually yes. At short focal lengths (under 200 mm) many mounts track well enough unguided.