M31 from Belfast: the stack grows
| Step | Frames | Minutes | FWHM | SNR |
|---|---|---|---|---|
| First light: Seestar live stack | 479 | 80 | 17.0″ | 19.41 |
| First pipeline, 8 Sep | 427 | 71 | 14.4″ | 11.07 |
| After the review, 9 Sep | 467 | 78 | 15.5″ | 16.48 |
| 25/26 Sep alone, all frames | 998 | 166 | 10.6″ | 13.41 |
| Two nights, 16 Oct | 995 | 166 | 13.3″ | 18.96 |
| 16/17 Oct alone | 375 | 62 | 9.4″ | 14.16 |
| Three nights, 17 Oct | 1841 | 307 | 11.9″ | 23.37 |
01 · Belfast · Bortle 6
Learning to capture M31 from rainy Belfast
I point a Seestar S30 Pro at the Andromeda Galaxy from Belfast, where most nights it rains. Each small square here is one 10‑second exposure.
- ZWO Seestar S30 Pro · 10 s exposures
- Bortle 6 · Belfast
- 3 nights so far
Each picture is the timeline's own image for its step, cut to one shared frame so the galaxy holds still.
M31 from Belfast
How the stack grew, ten seconds at a time