Moon altitude 6° above the horizon, age 16 days.
One photo of the
sky, every ten minutes.
A 140° fisheye on the roof photographs the sky every ten minutes. At night the frames are analysed for striking objects: ISS passes, the moon, meteors, sometimes an aircraft or a distant strip of thunderstorm. Most of it is clouds, and clouds are fine too.
Clear morning,
cloudy afternoon.
The camera takes 144 photos a day. Below is one snapshot every second hour. Dots on a night frame are stars or a meteor; the half circle at the bottom is the moon.
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00:00 50% - — 02:00 0%
- — 04:00 0%
- — 06:00 0%
- — 08:00 0%
- — 10:00 0%
- — 12:00 0%
- — 14:00 0%
- — 16:00 0%
- — 18:00 0%
- — 20:00 0%
- — 22:00 0%
ISS, meteors,
a forgotten aircraft.
An analysis script compares frames with the previous one and flags movements, lines or objects that don't match the star chart. Anything striking ends up here.
- Waning crescent
- ISS pass
Pass of the ISS, maximum elevation 21° above the horizon.
- ISS pass
Pass of the ISS, maximum elevation 35° above the horizon.
- ISS pass
Pass of the ISS, maximum elevation 28° above the horizon.
- Meteor
Streak detected in the frame, confidence 56%.
- Meteor
Streak detected in the frame, confidence 56%.
- Today 8 frames so far. Clear frames sit at 0%, below the monthly average of 55%.
- ISS passes in the past week: 6. Most recent on 22 May 22:36.
- 6 meteor detections so far, last on 10 May 16:10.
A ZWO ASI camera with a 2.5mm fisheye lens looks straight up from the roof. The Raspberry Pi grabs a frame every ten minutes and sends it to the NAS. At night a script runs that compares consecutive frames for differences, checks them against a star chart, and flags anything that moves or doesn't match the stars as "possibly interesting". After that I look it over by hand before I stick a name on it.