← single night · whole-night plan
Which nights are best for a target over the coming weeks. The astronomy mark (darkness × altitude × Moon) is computed for every night; the weather and the overall mark exist only where Open-Meteo has a forecast (the next four days) or ERA5 history (past nights) — the rest is honestly blank.
| night of | astronomy | weather | overall | best window | highest | dark h | Moon | Moon sep. |
|---|---|---|---|---|---|---|---|---|
| 2045-09-21 Thu | 0 | — | unknown | — | 50.1° 13:50 | 8.7 | 84% | 126.0° |
| 2045-09-22 Fri | 0 | — | unknown | — | 50.1° 13:45 | 8.75 | 90% | 137.6° |
| 2045-09-23 Sat | 0 | — | unknown | — | 50.1° 13:40 | 8.81 | 95% | 149.1° |
| 2045-09-24 Sun | 0 | — | unknown | — | 50.1° 13:40 | 8.86 | 98% | 160.3° |
| 2045-09-25 Mon | 0 | — | unknown | — | 50.1° 13:35 | 8.91 | 100% | 169.9° |
| 2045-09-26 Tue | 0 | — | unknown | — | 50.1° 13:30 | 8.96 | 100% | 169.5° |
| 2045-09-27 Wed | 0 | — | unknown | — | 50.1° 13:25 | 9.0 | 97% | 159.5° |
| 2045-09-28 Thu | 0 | — | unknown | — | 50.1° 13:20 | 9.05 | 93% | 147.7° |
| 2045-09-29 Fri | 0 | — | unknown | — | 50.1° 13:20 | 9.1 | 87% | 135.3° |
| 2045-09-30 Sat | 0 | — | unknown | — | 50.1° 13:15 | 9.15 | 79% | 122.5° |
| 2045-10-01 Sun | 0 | — | unknown | — | 50.1° 13:10 | 9.2 | 70% | 109.5° |
| 2045-10-02 Mon | 0 | — | unknown | — | 50.1° 13:05 | 9.25 | 59% | 96.2° |
| 2045-10-03 Tue | 0 | — | unknown | — | 50.1° 13:00 | 9.29 | 48% | 82.6° |
| 2045-10-04 Wed | 0 | — | unknown | — | 50.1° 13:00 | 9.34 | 37% | 68.7° |
| 2045-10-05 Thu | 0 | — | unknown | — | 50.1° 12:55 | 9.39 | 26% | 54.6° |
| 2045-10-06 Fri | 0 | — | unknown | — | 50.1° 12:50 | 9.43 | 17% | 40.4° |
| 2045-10-07 Sat | 0 | — | unknown | — | 50.1° 12:45 | 9.48 | 9% | 26.2° |
| 2045-10-08 Sun | 0 | — | unknown | — | 50.1° 12:45 | 9.53 | 3% | 13.1° |
| 2045-10-09 Mon | 0 | — | unknown | — | 50.1° 12:40 | 9.57 | 0% | 9.5° |
| 2045-10-10 Tue | 0 | — | unknown | — | 50.1° 12:35 | 9.62 | 0% | 20.8° |
| 2045-10-11 Wed | 0 | — | unknown | — | 50.1° 12:30 | 9.66 | 3% | 34.3° |
| 2045-10-12 Thu | 0 | — | unknown | — | 50.1° 12:25 | 9.71 | 8% | 47.8° |
| 2045-10-13 Fri | 0 | — | unknown | — | 50.1° 12:25 | 9.75 | 15% | 61.1° |
| 2045-10-14 Sat | 0 | — | unknown | — | 50.1° 12:20 | 9.79 | 23% | 73.9° |
| 2045-10-15 Sun | 0 | — | unknown | — | 50.1° 12:15 | 9.84 | 32% | 86.5° |
| 2045-10-16 Mon | 0 | — | unknown | — | 50.1° 12:10 | 9.88 | 42% | 98.7° |
| 2045-10-17 Tue | 0 | — | unknown | — | 50.1° 12:05 | 9.92 | 51% | 110.6° |
| 2045-10-18 Wed | 0 | — | unknown | — | 50.1° 12:00 | 9.97 | 61% | 122.4° |
| 2045-10-19 Thu | 0 | — | unknown | — | 50.1° 12:00 | 10.01 | 70% | 134.0° |
| 2045-10-20 Fri | 0 | — | unknown | — | 50.1° 11:50 | 10.05 | 78% | 145.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-09-21&days=30"
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&days=30&format=csv" -o m31-calendar.csvOne row per night: score_astronomy always, score_weather / score only where a forecast or history exists (null otherwise, with weather_source saying which), best window, dark hours, Moon illumination and separation, transit. 7–60 nights. Errors: 400 with invalid_date or target_unresolved. Results are cached for six hours; calculation version 2026-10-10.1.