← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-03-27 Thu | 21 | 0 | 0 | — | 72.5° 15:50 | 8.34 | 3% | 73.6° |
| 2025-03-28 Fri | 19 | 0 | 0 | — | 72.5° 15:45 | 8.29 | 0% | 58.7° |
| 2025-03-29 Sat | 18 | 6 | 1 | — | 72.5° 15:40 | 8.23 | 0% | 43.5° |
| 2025-03-30 Sun | 16 | 0 | 0 | — | 72.5° 16:35 | 8.18 | 3% | 28.4° |
| 2025-03-31 Mon | 12 | 11 | 1 | — | 72.5° 16:30 | 8.12 | 9% | 13.3° |
| 2025-04-01 Tue | 9 | 0 | 0 | — | 72.5° 16:30 | 8.07 | 17% | 1.6° |
| 2025-04-02 Wed | 7 | 0 | 0 | — | 72.5° 16:25 | 8.01 | 27% | 15.9° |
| 2025-04-03 Thu | 4 | 0 | 0 | — | 72.5° 16:20 | 7.96 | 37% | 29.9° |
| 2025-04-04 Fri | 3 | 49 | 1 | — | 72.5° 16:15 | 7.9 | 48% | 43.5° |
| 2025-04-05 Sat | 2 | 91 | 2 | 21:30–21:40 (marginal, 0.17 h) | 72.5° 16:15 | 7.85 | 59% | 56.7° |
| 2025-04-06 Sun | 2 | 0 | 0 | — | 72.5° 16:10 | 7.79 | 69% | 69.6° |
| 2025-04-07 Mon | 2 | 100 | 2 | — | 72.5° 16:05 | 7.74 | 78% | 82.2° |
| 2025-04-08 Tue | 1 | 0 | 0 | — | 72.5° 16:00 | 7.68 | 85% | 94.5° |
| 2025-04-09 Wed | 1 | 92 | 1 | — | 72.5° 15:55 | 7.62 | 92% | 106.7° |
| 2025-04-10 Thu | 1 | 0 | 0 | — | 72.5° 15:55 | 7.57 | 96% | 118.8° |
| 2025-04-11 Fri | 1 | 0 | 0 | — | 72.5° 15:50 | 7.51 | 99% | 130.7° |
| 2025-04-12 Sat | 1 | 0 | 0 | — | 72.5° 15:45 | 7.45 | 100% | 142.6° |
| 2025-04-13 Sun | 1 | 100 | 1 | — | 72.5° 15:40 | 7.39 | 99% | 154.4° |
| 2025-04-14 Mon | 1 | 0 | 0 | — | 72.5° 15:35 | 7.34 | 97% | 166.3° |
| 2025-04-15 Tue | 0 | 0 | 0 | — | 72.5° 15:35 | 7.28 | 92% | 178.1° |
| 2025-04-16 Wed | 0 | 88 | 0 | — | 72.5° 15:30 | 7.22 | 87% | 169.9° |
| 2025-04-17 Thu | 0 | 60 | 0 | — | 72.5° 15:25 | 7.16 | 79% | 157.9° |
| 2025-04-18 Fri | 0 | 93 | 0 | — | 72.5° 15:20 | 7.11 | 71% | 145.7° |
| 2025-04-19 Sat | 0 | 60 | 0 | — | 72.5° 15:20 | 7.05 | 62% | 133.2° |
| 2025-04-20 Sun | 0 | 26 | 0 | — | 72.5° 15:15 | 6.99 | 52% | 120.5° |
| 2025-04-21 Mon | 0 | 0 | 0 | — | 72.5° 15:10 | 6.93 | 41% | 107.4° |
| 2025-04-22 Tue | 0 | 0 | 0 | — | 72.5° 15:05 | 6.87 | 30% | 93.9° |
| 2025-04-23 Wed | 0 | 0 | 0 | — | 72.5° 15:00 | 6.81 | 21% | 79.9° |
| 2025-04-24 Thu | 0 | 0 | 0 | — | 72.5° 15:00 | 6.76 | 12% | 65.4° |
| 2025-04-25 Fri | 0 | 0 | 0 | — | 72.5° 14:55 | 6.7 | 5% | 50.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-03-27&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.