🔭 Equatorial Telescope Mount: Polar Alignment Error, Star Drift and Sharp Exposure Time (2D)

Side view of an equatorial mount with its polar axis and a plot of how a star drifts on the sensor during an exposure. Set latitude, azimuth and altitude alignment errors, target declination, hour angle, exposure and pixel scale, and watch the drift in arcseconds and pixels. Exact vector rotations, with four in-page numerical checks.