Astro Camera

night-by-night colour sweeps and stacks with a camera facing north and towards the pole and zenith
The Astro Camera: a clear plastic box taped shut, on a wooden arm outside the window above the garden
Pi 4 and v3 camera in a sandwich box from an upstairs window. The white triangle is a lens cover driven by the Pi with an SG90 servo (not visible, far outside of box). The lens is covered with a phone protector glass.
per-night brightness curves overlaid
astrocam v3
brightness curves (and an old reference) for a week. Clouds are bright in the suburbs and overcast is about 8, deep darkness about 4. 4 stops or bits is 16x more photons. The pedestal is 6 bits and must be greater than the electrical noise of the sensor.
23 Sep–29 Sepbrowse all nights →
2026-09-29
2026-09-2999/569 · 5.7
2026-09-28
2026-09-2896/628 · 7.2
2026-09-27
2026-09-27169/623 · 5.4
2026-09-26
2026-09-2677/620 · 5.6
2026-09-25
2026-09-2542/616 · 5.6
2026-09-24
2026-09-24481/610 · 4.4
2026-09-23
2026-09-23360/607 · 4.7
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