← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-09-08 Mon | 57 | 35 | 20 | 01:00–03:20 (marginal, 2.33 h) | 71.1° 22:10 | 8.01 | 98% | 62.9° |
| 2025-09-09 Tue | 71 | 98 | 70 | 21:20–00:15 (good, 2.92 h) | 71.1° 22:05 | 8.06 | 94% | 72.1° |
| 2025-09-10 Wed | 80 | 71 | 56 | 22:00–00:00 (good, 2.0 h) | 71.1° 22:05 | 8.12 | 87% | 82.1° |
| 2025-09-11 Thu | 100 | 16 | 16 | 02:00–03:30 (marginal, 1.5 h) | 71.1° 22:00 | 8.17 | 78% | 92.3° |
| 2025-09-12 Fri | 100 | 19 | 19 | 21:15–22:00 (good, 0.75 h) | 71.1° 21:55 | 8.23 | 67% | 102.3° |
| 2025-09-13 Sat | 100 | 92 | 92 | 21:10–02:45 (good, 5.58 h) | 71.1° 21:50 | 8.28 | 56% | 111.8° |
| 2025-09-14 Sun | 100 | 31 | 31 | 21:10–22:00 (good, 0.83 h) | 71.1° 21:45 | 8.33 | 44% | 120.3° |
| 2025-09-15 Mon | 100 | 99 | 99 | 21:05–02:45 (good, 5.67 h) | 71.1° 21:45 | 8.38 | 34% | 127.3° |
| 2025-09-16 Tue | 100 | 100 | 100 | 21:05–02:45 (good, 5.67 h) | 71.1° 21:40 | 8.44 | 24% | 132.2° |
| 2025-09-17 Wed | 100 | 91 | 91 | 21:05–02:40 (good, 5.58 h) | 71.1° 21:35 | 8.49 | 15% | 134.5° |
| 2025-09-18 Thu | 100 | 100 | 100 | 21:00–02:35 (good, 5.58 h) | 71.1° 21:30 | 8.54 | 8% | 133.8° |
| 2025-09-19 Fri | 100 | 98 | 98 | 21:00–02:30 (good, 5.5 h) | 71.1° 21:25 | 8.59 | 4% | 130.4° |
| 2025-09-20 Sat | 100 | 64 | 64 | 21:00–23:00 (good, 2.0 h) | 71.1° 21:25 | 8.64 | 1% | 125.0° |
| 2025-09-21 Sun | 100 | 100 | 100 | 20:55–02:25 (good, 5.5 h) | 71.1° 21:20 | 8.7 | 0% | 118.3° |
| 2025-09-22 Mon | 100 | 100 | 100 | 20:55–02:20 (good, 5.42 h) | 71.1° 21:15 | 8.75 | 1% | 110.6° |
| 2025-09-23 Tue | 100 | 99 | 99 | 20:50–02:20 (good, 5.5 h) | 71.1° 21:10 | 8.8 | 4% | 102.5° |
| 2025-09-24 Wed | 100 | 97 | 97 | 20:50–02:15 (good, 5.42 h) | 71.1° 21:10 | 8.85 | 9% | 94.2° |
| 2025-09-25 Thu | 100 | 0 | 0 | — | 71.1° 21:05 | 8.9 | 15% | 85.9° |
| 2025-09-26 Fri | 100 | 20 | 20 | 00:00–02:10 (marginal, 2.17 h) | 71.1° 21:00 | 8.95 | 22% | 77.7° |
| 2025-09-27 Sat | 100 | 23 | 23 | 20:45–21:00 (good, 0.25 h) | 71.1° 20:55 | 9.0 | 31% | 69.8° |
| 2025-09-28 Sun | 100 | 0 | 0 | — | 71.1° 20:50 | 9.05 | 40% | 62.4° |
| 2025-09-29 Mon | 97 | 0 | 0 | — | 71.1° 20:50 | 9.09 | 49% | 55.7° |
| 2025-09-30 Tue | 89 | 32 | 29 | 00:00–01:30 (good, 1.5 h) | 71.1° 20:45 | 9.14 | 59% | 50.2° |
| 2025-10-01 Wed | 75 | 0 | 0 | — | 71.1° 20:40 | 9.19 | 69% | 46.5° |
| 2025-10-02 Thu | 51 | 0 | 0 | — | 71.1° 20:35 | 9.24 | 78% | 45.4° |
| 2025-10-03 Fri | 43 | 0 | 0 | — | 71.1° 20:30 | 9.29 | 86% | 47.3° |
| 2025-10-04 Sat | 39 | 91 | 35 | 20:30–01:40 (marginal, 5.17 h) | 71.1° 20:30 | 9.33 | 93% | 52.0° |
| 2025-10-05 Sun | 40 | 72 | 29 | 20:30–23:00 (marginal, 2.5 h) | 71.1° 20:25 | 9.38 | 98% | 59.2° |
| 2025-10-06 Mon | 47 | 0 | 0 | — | 71.1° 20:20 | 9.43 | 100% | 68.1° |
| 2025-10-07 Tue | 58 | 0 | 0 | — | 71.1° 20:15 | 9.47 | 99% | 78.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-09-08&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.