← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-10-15 Wed | 100 | 16 | 16 | 23:00–00:00 (good, 1.0 h) | 87.1° 18:20 | 9.83 | 28% | 110.7° |
| 2025-10-16 Thu | 100 | 0 | 0 | — | 87.1° 18:15 | 9.87 | 19% | 107.6° |
| 2025-10-17 Fri | 100 | 0 | 0 | — | 87.1° 18:15 | 9.92 | 12% | 103.7° |
| 2025-10-18 Sat | 100 | 0 | 0 | — | 87.1° 18:10 | 9.96 | 6% | 99.3° |
| 2025-10-19 Sun | 100 | 0 | 0 | — | 87.1° 18:05 | 10.0 | 2% | 94.6° |
| 2025-10-20 Mon | 100 | 44 | 44 | 20:05–21:00 (good, 0.92 h) | 87.1° 18:00 | 10.04 | 0% | 89.7° |
| 2025-10-21 Tue | 100 | 23 | 23 | 23:00–00:00 (marginal, 1.0 h) | 87.1° 18:00 | 10.08 | 0% | 84.9° |
| 2025-10-22 Wed | 100 | 67 | 67 | 20:05–22:00 (good, 1.92 h) | 87.1° 17:55 | 10.13 | 2% | 80.3° |
| 2025-10-23 Thu | 98 | 44 | 43 | 20:05–21:00 (good, 0.92 h) | 87.1° 17:50 | 10.17 | 5% | 76.1° |
| 2025-10-24 Fri | 97 | 59 | 57 | 20:00–21:00 (good, 1.0 h) | 87.1° 17:45 | 10.21 | 10% | 72.5° |
| 2025-10-25 Sat | 96 | 64 | 61 | 20:00–22:00 (good, 2.0 h) | 87.1° 17:40 | 10.25 | 17% | 69.5° |
| 2025-10-26 Sun | 87 | 0 | 0 | — | 87.1° 16:40 | 10.29 | 24% | 67.4° |
| 2025-10-27 Mon | 78 | 92 | 72 | 19:00–22:35 (good, 3.58 h) | 87.1° 16:35 | 10.32 | 33% | 66.3° |
| 2025-10-28 Tue | 69 | 98 | 68 | 18:55–22:30 (good, 3.58 h) | 87.1° 16:30 | 10.36 | 42% | 66.3° |
| 2025-10-29 Wed | 60 | 100 | 60 | 18:55–22:05 (good, 3.17 h) | 87.1° 16:25 | 10.4 | 52% | 67.5° |
| 2025-10-30 Thu | 53 | 48 | 26 | 21:00–21:10 (good, 0.17 h) | 87.1° 16:20 | 10.44 | 63% | 69.8° |
| 2025-10-31 Fri | 47 | 0 | 0 | — | 87.1° 16:20 | 10.47 | 73% | 73.4° |
| 2025-11-01 Sat | 43 | 92 | 40 | 20:00–20:35 (good, 0.58 h) | 87.1° 16:15 | 10.51 | 82% | 77.9° |
| 2025-11-02 Sun | 41 | 76 | 31 | 18:50–20:00 (good, 1.17 h) | 87.1° 16:10 | 10.55 | 90% | 83.3° |
| 2025-11-03 Mon | 43 | 11 | 5 | 18:50–19:00 (marginal, 0.17 h) | 87.1° 16:05 | 10.58 | 96% | 89.2° |
| 2025-11-04 Tue | 46 | 0 | 0 | — | 87.1° 16:05 | 10.62 | 99% | 95.3° |
| 2025-11-05 Wed | 51 | 0 | 0 | — | 87.1° 16:00 | 10.65 | 100% | 101.1° |
| 2025-11-06 Thu | 57 | 0 | 0 | — | 87.1° 15:55 | 10.69 | 97% | 106.2° |
| 2025-11-07 Fri | 61 | 0 | 0 | — | 87.1° 15:50 | 10.72 | 92% | 110.3° |
| 2025-11-08 Sat | 73 | 0 | 0 | — | 87.1° 15:45 | 10.75 | 84% | 112.9° |
| 2025-11-09 Sun | 74 | 7 | 6 | — | 87.1° 15:45 | 10.78 | 74% | 113.9° |
| 2025-11-10 Mon | 74 | 0 | 0 | — | 87.1° 15:40 | 10.82 | 64% | 113.4° |
| 2025-11-11 Tue | 74 | 88 | 65 | 18:40–21:30 (good, 2.83 h) | 87.1° 15:35 | 10.85 | 53% | 111.6° |
| 2025-11-12 Wed | 72 | 38 | 28 | 21:00–21:30 (good, 0.5 h) | 87.1° 15:30 | 10.88 | 43% | 108.6° |
| 2025-11-13 Thu | 71 | 99 | 70 | 18:40–21:25 (good, 2.75 h) | 87.1° 15:25 | 10.91 | 33% | 104.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-10-15&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.