← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-10-20 Mon | 89 | 0 | 0 | — | 42.9° 05:00 | 10.04 | 0% | 113.0° |
| 2025-10-21 Tue | 89 | 0 | 0 | — | 42.9° 04:55 | 10.08 | 0% | 122.3° |
| 2025-10-22 Wed | 89 | 0 | 0 | — | 42.9° 04:50 | 10.13 | 2% | 130.8° |
| 2025-10-23 Thu | 89 | 2 | 2 | — | 42.9° 04:45 | 10.17 | 5% | 138.2° |
| 2025-10-24 Fri | 89 | 83 | 74 | 01:50–06:00 (good, 4.17 h) | 42.9° 04:45 | 10.21 | 10% | 143.6° |
| 2025-10-25 Sat | 89 | 23 | 21 | 01:20–03:00 (marginal, 1.67 h) | 42.9° 03:40 | 10.25 | 17% | 146.1° |
| 2025-10-26 Sun | 89 | 12 | 10 | 04:00–05:00 (marginal, 1.0 h) | 42.9° 03:35 | 10.29 | 24% | 145.1° |
| 2025-10-27 Mon | 89 | 35 | 31 | 00:20–01:00 (good, 0.67 h) | 42.9° 03:30 | 10.32 | 33% | 140.8° |
| 2025-10-28 Tue | 89 | 100 | 89 | 00:15–05:20 (good, 5.08 h) | 42.9° 03:25 | 10.36 | 42% | 133.9° |
| 2025-10-29 Wed | 89 | 100 | 89 | 00:10–05:20 (good, 5.17 h) | 42.9° 03:25 | 10.4 | 52% | 125.2° |
| 2025-10-30 Thu | 89 | 31 | 28 | 00:10–02:00 (good, 1.83 h) | 42.9° 03:20 | 10.44 | 63% | 115.3° |
| 2025-10-31 Fri | 89 | 65 | 58 | 00:15–02:00 (good, 1.75 h) | 42.9° 03:15 | 10.47 | 73% | 104.6° |
| 2025-11-01 Sat | 89 | 99 | 88 | 00:25–05:25 (good, 5.0 h) | 42.9° 03:10 | 10.51 | 82% | 93.1° |
| 2025-11-02 Sun | 87 | 95 | 83 | 01:35–05:25 (good, 3.83 h) | 42.9° 03:05 | 10.55 | 90% | 81.2° |
| 2025-11-03 Mon | 71 | 0 | 0 | — | 42.9° 03:05 | 10.58 | 96% | 69.1° |
| 2025-11-04 Tue | 35 | 0 | 0 | — | 42.9° 03:00 | 10.62 | 99% | 57.4° |
| 2025-11-05 Wed | 22 | 0 | 0 | — | 42.9° 02:55 | 10.65 | 100% | 46.6° |
| 2025-11-06 Thu | 15 | 0 | 0 | — | 42.9° 02:50 | 10.69 | 97% | 38.2° |
| 2025-11-07 Fri | 13 | 0 | 0 | — | 42.9° 02:50 | 10.72 | 92% | 33.9° |
| 2025-11-08 Sat | 20 | 0 | 0 | — | 42.9° 02:45 | 10.75 | 84% | 35.2° |
| 2025-11-09 Sun | 34 | 0 | 0 | — | 42.9° 02:40 | 10.78 | 74% | 41.2° |
| 2025-11-10 Mon | 53 | 0 | 0 | — | 42.9° 02:35 | 10.82 | 64% | 49.8° |
| 2025-11-11 Tue | 68 | 100 | 68 | 23:40–04:30 (good, 4.83 h) | 42.9° 02:30 | 10.85 | 53% | 59.7° |
| 2025-11-12 Wed | 83 | 99 | 83 | 23:15–05:20 (good, 6.08 h) | 42.9° 02:30 | 10.88 | 43% | 69.9° |
| 2025-11-13 Thu | 87 | 87 | 76 | 23:10–04:00 (good, 4.83 h) | 42.9° 02:25 | 10.91 | 33% | 80.3° |
| 2025-11-14 Fri | 89 | 100 | 89 | 23:05–05:30 (good, 6.42 h) | 42.9° 02:20 | 10.94 | 24% | 90.6° |
| 2025-11-15 Sat | 89 | 44 | 39 | 04:00–05:00 (good, 1.0 h) | 42.9° 02:15 | 10.97 | 16% | 100.7° |
| 2025-11-16 Sun | 89 | 16 | 14 | 23:00–00:00 (marginal, 1.0 h) | 42.9° 02:10 | 10.99 | 10% | 110.6° |
| 2025-11-17 Mon | 89 | 0 | 0 | — | 42.9° 02:10 | 11.02 | 5% | 120.0° |
| 2025-11-18 Tue | 89 | 0 | 0 | — | 42.9° 02:05 | 11.05 | 2% | 128.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-10-20&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.