← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-11-26 Wed | 89 | 0 | 0 | — | 42.9° 01:35 | 11.24 | 36% | 118.4° |
| 2025-11-27 Thu | 89 | 0 | 0 | — | 42.9° 01:30 | 11.26 | 46% | 108.2° |
| 2025-11-28 Fri | 89 | 0 | 0 | — | 42.9° 01:25 | 11.28 | 57% | 97.3° |
| 2025-11-29 Sat | 88 | 0 | 0 | — | 42.9° 01:20 | 11.3 | 67% | 86.0° |
| 2025-11-30 Sun | 85 | 0 | 0 | — | 42.9° 01:15 | 11.32 | 78% | 74.3° |
| 2025-12-01 Mon | 71 | 56 | 40 | 21:50–02:00 (marginal, 4.17 h) | 42.9° 01:15 | 11.34 | 86% | 62.6° |
| 2025-12-02 Tue | 37 | 74 | 27 | 02:00–04:50 (marginal, 2.83 h) | 42.9° 01:10 | 11.35 | 94% | 51.5° |
| 2025-12-03 Wed | 21 | 5 | 1 | — | 42.9° 01:05 | 11.37 | 98% | 41.7° |
| 2025-12-04 Thu | 12 | 0 | 0 | — | 42.9° 01:00 | 11.38 | 100% | 35.2° |
| 2025-12-05 Fri | 11 | 0 | 0 | — | 42.9° 01:00 | 11.4 | 98% | 33.8° |
| 2025-12-06 Sat | 18 | 0 | 0 | — | 42.9° 00:55 | 11.41 | 94% | 38.1° |
| 2025-12-07 Sun | 32 | 0 | 0 | — | 42.9° 00:50 | 11.42 | 88% | 46.1° |
| 2025-12-08 Mon | 51 | 0 | 0 | — | 42.9° 00:45 | 11.44 | 79% | 56.0° |
| 2025-12-09 Tue | 80 | 15 | 12 | 23:00–01:00 (marginal, 2.0 h) | 42.9° 00:40 | 11.45 | 70% | 66.5° |
| 2025-12-10 Wed | 86 | 32 | 28 | 03:00–04:15 (marginal, 1.25 h) | 42.9° 00:40 | 11.46 | 60% | 77.2° |
| 2025-12-11 Thu | 88 | 22 | 19 | 20:50–23:00 (marginal, 2.17 h) | 42.9° 00:35 | 11.47 | 49% | 87.8° |
| 2025-12-12 Fri | 89 | 41 | 36 | 21:15–23:00 (good, 1.75 h) | 42.9° 00:30 | 11.47 | 40% | 98.1° |
| 2025-12-13 Sat | 89 | 6 | 6 | — | 42.9° 00:25 | 11.48 | 30% | 108.1° |
| 2025-12-14 Sun | 89 | 49 | 44 | 02:00–03:40 (good, 1.67 h) | 42.9° 00:20 | 11.49 | 22% | 117.6° |
| 2025-12-15 Mon | 89 | 100 | 89 | 21:05–03:35 (good, 6.5 h) | 42.9° 00:20 | 11.49 | 15% | 126.6° |
| 2025-12-16 Tue | 89 | 88 | 79 | 21:00–02:00 (good, 5.0 h) | 42.9° 00:15 | 11.5 | 9% | 134.6° |
| 2025-12-17 Wed | 89 | 56 | 50 | 20:55–23:00 (good, 2.08 h) | 42.9° 00:10 | 11.5 | 4% | 141.2° |
| 2025-12-18 Thu | 89 | 0 | 0 | — | 42.9° 00:05 | 11.5 | 1% | 145.4° |
| 2025-12-19 Fri | 89 | 91 | 81 | 20:55–03:00 (good, 6.08 h) | 42.9° 00:05 | 11.51 | 0% | 146.3° |
| 2025-12-20 Sat | 89 | 0 | 0 | — | 42.9° 00:00 | 11.51 | 1% | 143.5° |
| 2025-12-21 Sun | 89 | 0 | 0 | — | 42.9° 23:55 | 11.51 | 3% | 137.8° |
| 2025-12-22 Mon | 89 | 0 | 0 | — | 42.9° 23:50 | 11.51 | 8% | 129.9° |
| 2025-12-23 Tue | 89 | 0 | 0 | — | 42.9° 23:45 | 11.51 | 14% | 120.8° |
| 2025-12-24 Wed | 89 | 0 | 0 | — | 42.9° 23:45 | 11.5 | 21% | 110.7° |
| 2025-12-25 Thu | 89 | 0 | 0 | — | 42.9° 23:40 | 11.5 | 30% | 100.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-11-26&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.