Astro Camera
night · 2026-10-17
2026-10-212026-10-202026-10-192026-10-182026-10-172026-10-142026-10-132026-10-122026-10-112026-10-102026-10-092026-10-082026-10-072026-10-06
1How dark the night was
2817 frames of 14.9 s, 19:04 to 06:43 (London time). Darkest sky 4.68 stops above black (17.7 mag/arcsec²), so clear.
2322 / 2817
frames in star trails / captured
4.68
darkest sky, stops above black (59.9 s equiv.)
17.70
darkest sky, mag/arcsec² (Gaia G)
1303
bad pixels
astrocam v3 · night of 17 Oct 2026
Sky brightness of every frame (log₂: one stop is twice the light). Dusk and dawn are the slopes at each end; cloud shows as a bump. The star-trail stack uses only frames within 30% of the darkest 10 minutes, so twilight and cloud are left out of it. Left out is not thrown away: those frames still go into the videos.2What the camera saw
astrocam v3 · night of 17 Oct 2026
The raw night: a 10 minute stack sliding on 1 minute per video frame. Dusk, cloud, aircraft and dawn all show here, five seconds for the whole night. · full-res3Sky glow removed
astrocam v3 · night of 17 Oct 2026
The night's smooth glow from streetlights is fitted and subtracted from every frame, and the trees and roof are masked. Star trails wheel round the pole and the Milky Way survives. · full-res4The whole night in one frame
astrocam v3 · night of 17 Oct 2026
The brightest value each pixel reached all night: every star draws its trail across the night.