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.
16 Sep–22 Sepbrowse all nights →
2026-09-22
2026-09-22114/603 · 4.4
2026-09-21
2026-09-21570/598 · 4.2
2026-09-20
2026-09-20572/595 · 4.3
2026-09-19
2026-09-1939/591 · 6.5
2026-09-18
2026-09-1853/586 · 5.3
2026-09-17
2026-09-17447/584 · 4.3
2026-09-16
2026-09-16148/578 · 4.3
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