← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-11-17 Mon | 80 | 0 | 0 | — | 71.1° 16:35 | 11.02 | 5% | 98.7° |
| 2025-11-18 Tue | 78 | 0 | 0 | — | 71.1° 16:30 | 11.05 | 2% | 90.4° |
| 2025-11-19 Wed | 77 | 4 | 3 | — | 71.1° 16:25 | 11.08 | 0% | 82.0° |
| 2025-11-20 Thu | 75 | 12 | 9 | — | 71.1° 16:25 | 11.1 | 0% | 73.9° |
| 2025-11-21 Fri | 73 | 1 | 0 | — | 71.1° 16:20 | 11.13 | 3% | 66.1° |
| 2025-11-22 Sat | 72 | 48 | 35 | 20:00–21:00 (good, 1.0 h) | 71.1° 16:15 | 11.15 | 6% | 58.9° |
| 2025-11-23 Sun | 68 | 97 | 66 | 18:35–21:20 (good, 2.75 h) | 71.1° 16:10 | 11.17 | 12% | 52.7° |
| 2025-11-24 Mon | 61 | 97 | 59 | 18:35–21:10 (good, 2.58 h) | 71.1° 16:10 | 11.2 | 18% | 48.0° |
| 2025-11-25 Tue | 52 | 0 | 0 | — | 71.1° 16:05 | 11.22 | 27% | 45.4° |
| 2025-11-26 Wed | 45 | 5 | 2 | — | 71.1° 16:00 | 11.24 | 36% | 45.3° |
| 2025-11-27 Thu | 37 | 0 | 0 | — | 71.1° 15:55 | 11.26 | 46% | 47.9° |
| 2025-11-28 Fri | 31 | 0 | 0 | — | 71.1° 15:50 | 11.28 | 57% | 53.1° |
| 2025-11-29 Sat | 26 | 0 | 0 | — | 71.1° 15:50 | 11.3 | 67% | 60.3° |
| 2025-11-30 Sun | 24 | 0 | 0 | — | 71.1° 15:45 | 11.32 | 78% | 69.1° |
| 2025-12-01 Mon | 24 | 90 | 22 | 18:35–21:05 (marginal, 2.5 h) | 71.1° 15:40 | 11.34 | 86% | 78.9° |
| 2025-12-02 Tue | 26 | 0 | 0 | — | 71.1° 15:35 | 11.35 | 94% | 89.4° |
| 2025-12-03 Wed | 30 | 22 | 7 | 18:35–19:00 (marginal, 0.42 h) | 71.1° 15:30 | 11.37 | 98% | 100.1° |
| 2025-12-04 Thu | 35 | 0 | 0 | — | 71.1° 15:30 | 11.38 | 100% | 110.5° |
| 2025-12-05 Fri | 40 | 0 | 0 | — | 71.1° 15:25 | 11.4 | 98% | 120.0° |
| 2025-12-06 Sat | 40 | 0 | 0 | — | 71.1° 15:20 | 11.41 | 94% | 127.8° |
| 2025-12-07 Sun | 44 | 9 | 4 | — | 71.1° 15:15 | 11.42 | 88% | 133.0° |
| 2025-12-08 Mon | 44 | 55 | 24 | 19:00–19:55 (good, 0.92 h) | 71.1° 15:15 | 11.44 | 79% | 135.1° |
| 2025-12-09 Tue | 42 | 1 | 0 | — | 71.1° 15:10 | 11.45 | 70% | 133.8° |
| 2025-12-10 Wed | 41 | 6 | 3 | — | 71.1° 15:05 | 11.46 | 60% | 129.8° |
| 2025-12-11 Thu | 40 | 98 | 39 | 18:35–20:00 (good, 1.42 h) | 71.1° 15:00 | 11.47 | 49% | 123.9° |
| 2025-12-12 Fri | 38 | 99 | 37 | 18:35–20:00 (good, 1.42 h) | 71.1° 14:55 | 11.47 | 40% | 116.8° |
| 2025-12-13 Sat | 36 | 52 | 19 | 18:35–20:00 (marginal, 1.42 h) | 71.1° 14:55 | 11.48 | 30% | 109.0° |
| 2025-12-14 Sun | 35 | 100 | 35 | 18:35–19:55 (good, 1.33 h) | 71.1° 14:50 | 11.49 | 22% | 100.9° |
| 2025-12-15 Mon | 34 | 100 | 34 | 18:35–19:50 (good, 1.25 h) | 71.1° 14:45 | 11.49 | 15% | 92.5° |
| 2025-12-16 Tue | 32 | 100 | 32 | 18:35–19:45 (good, 1.17 h) | 71.1° 14:40 | 11.5 | 9% | 84.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-11-17&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.