← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-03-22 Sat | 27 | 0 | 0 | — | 71.1° 08:20 | 8.61 | 45% | 55.1° |
| 2025-03-23 Sun | 33 | 0 | 0 | — | 71.1° 08:15 | 8.55 | 35% | 49.8° |
| 2025-03-24 Mon | 38 | 0 | 0 | — | 71.1° 08:10 | 8.5 | 26% | 46.6° |
| 2025-03-25 Tue | 40 | 0 | 0 | — | 71.1° 08:05 | 8.45 | 17% | 46.3° |
| 2025-03-26 Wed | 41 | 0 | 0 | — | 71.1° 08:05 | 8.39 | 9% | 49.1° |
| 2025-03-27 Thu | 43 | 4 | 2 | — | 71.1° 08:00 | 8.34 | 3% | 54.8° |
| 2025-03-28 Fri | 43 | 0 | 0 | — | 71.1° 07:55 | 8.29 | 0% | 62.8° |
| 2025-03-29 Sat | 44 | 0 | 0 | — | 71.1° 08:50 | 8.23 | 0% | 72.3° |
| 2025-03-30 Sun | 45 | 0 | 0 | — | 71.1° 08:45 | 8.18 | 3% | 82.5° |
| 2025-03-31 Mon | 46 | 0 | 0 | — | 71.1° 08:45 | 8.12 | 9% | 93.0° |
| 2025-04-01 Tue | 47 | 0 | 0 | — | 71.1° 08:40 | 8.07 | 17% | 103.1° |
| 2025-04-02 Wed | 47 | 0 | 0 | — | 71.1° 08:35 | 8.01 | 27% | 112.5° |
| 2025-04-03 Thu | 48 | 0 | 0 | — | 71.1° 08:30 | 7.96 | 37% | 120.8° |
| 2025-04-04 Fri | 50 | 0 | 0 | — | 71.1° 08:30 | 7.9 | 48% | 127.4° |
| 2025-04-05 Sat | 49 | 78 | 38 | 04:00–05:20 (good, 1.33 h) | 71.1° 08:25 | 7.85 | 59% | 131.9° |
| 2025-04-06 Sun | 50 | 0 | 0 | — | 71.1° 08:20 | 7.79 | 69% | 133.9° |
| 2025-04-07 Mon | 49 | 2 | 1 | — | 71.1° 08:15 | 7.74 | 78% | 133.2° |
| 2025-04-08 Tue | 45 | 87 | 39 | 04:05–05:15 (good, 1.17 h) | 71.1° 08:10 | 7.68 | 85% | 130.0° |
| 2025-04-09 Wed | 46 | 93 | 43 | 03:35–05:15 (good, 1.67 h) | 71.1° 08:10 | 7.62 | 92% | 125.0° |
| 2025-04-10 Thu | 44 | 38 | 17 | 05:00–05:10 (good, 0.17 h) | 71.1° 08:05 | 7.57 | 96% | 118.6° |
| 2025-04-11 Fri | 41 | 3 | 1 | — | 71.1° 08:00 | 7.51 | 99% | 111.4° |
| 2025-04-12 Sat | 37 | 0 | 0 | — | 71.1° 07:55 | 7.45 | 100% | 103.6° |
| 2025-04-13 Sun | 34 | 0 | 0 | — | 71.1° 07:50 | 7.39 | 99% | 95.5° |
| 2025-04-14 Mon | 32 | 7 | 2 | — | 71.1° 07:50 | 7.34 | 97% | 87.3° |
| 2025-04-15 Tue | 31 | 79 | 24 | 02:35–05:00 (marginal, 2.42 h) | 71.1° 07:45 | 7.28 | 92% | 79.1° |
| 2025-04-16 Wed | 30 | 96 | 29 | 04:05–05:00 (good, 0.92 h) | 71.1° 07:40 | 7.22 | 87% | 71.2° |
| 2025-04-17 Thu | 31 | 0 | 0 | — | 71.1° 07:35 | 7.16 | 79% | 63.6° |
| 2025-04-18 Fri | 33 | 0 | 0 | — | 71.1° 07:35 | 7.11 | 71% | 56.8° |
| 2025-04-19 Sat | 38 | 37 | 14 | 02:40–02:45 (good, 0.08 h) | 71.1° 07:30 | 7.05 | 62% | 51.2° |
| 2025-04-20 Sun | 49 | 84 | 41 | 03:00–04:50 (good, 1.83 h) | 71.1° 07:25 | 6.99 | 52% | 47.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-03-22&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.