← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-12-02 Tue | 39 | 9 | 4 | — | 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% | 87.3° |
| 2025-12-05 Fri | 64 | 0 | 0 | — | 87.2° 16:20 | 11.4 | 98% | 95.5° |
| 2025-12-06 Sat | 76 | 0 | 0 | — | 87.2° 16:20 | 11.41 | 94% | 103.2° |
| 2025-12-07 Sun | 96 | 5 | 5 | — | 87.3° 16:15 | 11.42 | 88% | 110.1° |
| 2025-12-08 Mon | 99 | 31 | 31 | 18:35–20:00 (good, 1.42 h) | 87.3° 16:10 | 11.44 | 79% | 115.7° |
| 2025-12-09 Tue | 100 | 0 | 0 | — | 87.2° 16:05 | 11.45 | 70% | 119.8° |
| 2025-12-10 Wed | 100 | 3 | 3 | — | 87.2° 16:05 | 11.46 | 60% | 122.1° |
| 2025-12-11 Thu | 98 | 86 | 84 | 18:35–21:40 (good, 3.08 h) | 87.2° 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% | 118.3° |
| 2025-12-14 Sun | 93 | 96 | 89 | 18:35–22:00 (good, 3.42 h) | 87.2° 15:45 | 11.49 | 22% | 114.3° |
| 2025-12-15 Mon | 91 | 100 | 91 | 18:35–22:05 (good, 3.5 h) | 87.2° 15:45 | 11.49 | 15% | 109.4° |
| 2025-12-16 Tue | 89 | 100 | 89 | 18:35–22:00 (good, 3.42 h) | 87.3° 15:40 | 11.5 | 9% | 103.8° |
| 2025-12-17 Wed | 87 | 98 | 85 | 18:35–21:55 (good, 3.33 h) | 87.3° 15:35 | 11.5 | 4% | 97.7° |
| 2025-12-18 Thu | 85 | 0 | 0 | — | 87.3° 15:30 | 11.5 | 1% | 91.4° |
| 2025-12-19 Fri | 82 | 94 | 77 | 18:35–21:40 (good, 3.08 h) | 87.2° 15:25 | 11.51 | 0% | 85.0° |
| 2025-12-20 Sat | 81 | 21 | 17 | 18:35–19:00 (good, 0.42 h) | 87.2° 15:25 | 11.51 | 1% | 78.7° |
| 2025-12-21 Sun | 78 | 1 | 1 | — | 87.3° 15:20 | 11.51 | 3% | 72.6° |
| 2025-12-22 Mon | 74 | 37 | 28 | 18:35–20:00 (good, 1.42 h) | 87.3° 15:15 | 11.51 | 8% | 67.2° |
| 2025-12-23 Tue | 67 | 4 | 3 | — | 87.2° 15:10 | 11.51 | 14% | 62.6° |
| 2025-12-24 Wed | 60 | 0 | 0 | — | 87.2° 15:05 | 11.5 | 21% | 59.3° |
| 2025-12-25 Thu | 52 | 0 | 0 | — | 87.2° 15:05 | 11.5 | 30% | 57.5° |
| 2025-12-26 Fri | 43 | 66 | 28 | 18:40–20:00 (marginal, 1.33 h) | 87.3° 15:00 | 11.5 | 41% | 57.6° |
| 2025-12-27 Sat | 35 | 100 | 35 | 18:40–20:45 (good, 2.08 h) | 87.3° 14:55 | 11.49 | 51% | 59.7° |
| 2025-12-28 Sun | 29 | 61 | 18 | 19:00–21:20 (marginal, 2.33 h) | 87.2° 14:50 | 11.48 | 62% | 63.6° |
| 2025-12-29 Mon | 25 | 100 | 25 | 18:40–21:30 (marginal, 2.83 h) | 87.2° 14:50 | 11.48 | 73% | 69.2° |
| 2025-12-30 Tue | 24 | 53 | 13 | 18:40–20:00 (marginal, 1.33 h) | 87.3° 14:45 | 11.47 | 83% | 76.1° |
| 2025-12-31 Wed | 24 | 60 | 14 | 18:45–20:00 (marginal, 1.25 h) | 87.3° 14:40 | 11.46 | 91% | 83.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-12-02&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.