← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-11-15 Sat | 100 | 84 | 84 | 18:40–23:00 (good, 4.33 h) | 87.3° 17:40 | 10.97 | 16% | 120.4° |
| 2025-11-16 Sun | 100 | 44 | 44 | 18:40–19:00 (good, 0.33 h) | 87.3° 17:35 | 10.99 | 10% | 117.3° |
| 2025-11-17 Mon | 100 | 0 | 0 | — | 87.3° 17:35 | 11.02 | 5% | 113.1° |
| 2025-11-18 Tue | 100 | 0 | 0 | — | 87.3° 17:30 | 11.05 | 2% | 108.0° |
| 2025-11-19 Wed | 100 | 2 | 2 | — | 87.3° 17:25 | 11.08 | 0% | 102.2° |
| 2025-11-20 Thu | 100 | 14 | 14 | — | 87.3° 17:20 | 11.1 | 0% | 96.1° |
| 2025-11-21 Fri | 100 | 0 | 0 | — | 87.3° 17:15 | 11.13 | 3% | 89.8° |
| 2025-11-22 Sat | 100 | 33 | 33 | 20:00–21:00 (good, 1.0 h) | 87.3° 17:15 | 11.15 | 6% | 83.4° |
| 2025-11-23 Sun | 100 | 98 | 98 | 18:35–23:30 (good, 4.92 h) | 87.3° 17:10 | 11.17 | 12% | 77.2° |
| 2025-11-24 Mon | 99 | 98 | 97 | 18:35–23:25 (good, 4.83 h) | 87.3° 17:05 | 11.2 | 18% | 71.4° |
| 2025-11-25 Tue | 91 | 0 | 0 | — | 87.3° 17:00 | 11.22 | 27% | 66.2° |
| 2025-11-26 Wed | 86 | 7 | 6 | — | 87.3° 17:00 | 11.24 | 36% | 61.9° |
| 2025-11-27 Thu | 79 | 0 | 0 | — | 87.3° 16:55 | 11.26 | 46% | 58.9° |
| 2025-11-28 Fri | 64 | 0 | 0 | — | 87.3° 16:50 | 11.28 | 57% | 57.5° |
| 2025-11-29 Sat | 51 | 0 | 0 | — | 87.3° 16:45 | 11.3 | 67% | 58.2° |
| 2025-11-30 Sun | 43 | 0 | 0 | — | 87.3° 16:40 | 11.32 | 78% | 60.9° |
| 2025-12-01 Mon | 39 | 94 | 37 | 18:35–23:10 (marginal, 4.58 h) | 87.3° 16:40 | 11.34 | 86% | 65.6° |
| 2025-12-02 Tue | 39 | 9 | 3 | — | 87.3° 16:35 | 11.35 | 94% | 71.9° |
| 2025-12-03 Wed | 44 | 13 | 6 | 18:35–19:00 (marginal, 0.42 h) | 87.3° 16:30 | 11.37 | 98% | 79.3° |
| 2025-12-04 Thu | 53 | 0 | 0 | — | 87.3° 16:25 | 11.38 | 100% | 87.4° |
| 2025-12-05 Fri | 64 | 0 | 0 | — | 87.3° 16:20 | 11.4 | 98% | 95.5° |
| 2025-12-06 Sat | 76 | 0 | 0 | — | 87.3° 16:20 | 11.41 | 94% | 103.3° |
| 2025-12-07 Sun | 96 | 5 | 5 | — | 87.3° 16:15 | 11.42 | 88% | 110.2° |
| 2025-12-08 Mon | 99 | 31 | 31 | 18:35–20:00 (good, 1.42 h) | 87.3° 16:10 | 11.44 | 79% | 115.8° |
| 2025-12-09 Tue | 100 | 0 | 0 | — | 87.3° 16:05 | 11.45 | 70% | 119.9° |
| 2025-12-10 Wed | 99 | 3 | 3 | — | 87.3° 16:05 | 11.46 | 60% | 122.1° |
| 2025-12-11 Thu | 98 | 86 | 84 | 18:35–21:40 (good, 3.08 h) | 87.3° 16:00 | 11.47 | 49% | 122.5° |
| 2025-12-12 Fri | 97 | 97 | 94 | 18:35–22:00 (good, 3.42 h) | 87.3° 15:55 | 11.47 | 40% | 121.2° |
| 2025-12-13 Sat | 95 | 34 | 33 | 18:35–19:00 (good, 0.42 h) | 87.3° 15:50 | 11.48 | 30% | 118.4° |
| 2025-12-14 Sun | 93 | 96 | 89 | 18:35–22:00 (good, 3.42 h) | 87.3° 15:45 | 11.49 | 22% | 114.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-11-15&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.