← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-11-30 Sun | 23 | 0 | 0 | — | 87.1° 14:20 | 11.32 | 78% | 86.5° |
| 2025-12-01 Mon | 23 | 90 | 21 | 18:35–20:40 (marginal, 2.08 h) | 87.1° 14:15 | 11.34 | 86% | 92.4° |
| 2025-12-02 Tue | 23 | 0 | 0 | — | 87.1° 14:10 | 11.35 | 94% | 98.4° |
| 2025-12-03 Wed | 24 | 26 | 6 | 18:35–19:00 (marginal, 0.42 h) | 87.1° 14:10 | 11.37 | 98% | 103.9° |
| 2025-12-04 Thu | 26 | 0 | 0 | — | 87.1° 14:05 | 11.38 | 100% | 108.6° |
| 2025-12-05 Fri | 27 | 0 | 0 | — | 87.1° 14:00 | 11.4 | 98% | 112.0° |
| 2025-12-06 Sat | 29 | 0 | 0 | — | 87.1° 13:55 | 11.41 | 94% | 113.9° |
| 2025-12-07 Sun | 33 | 11 | 4 | — | 87.1° 13:55 | 11.42 | 88% | 114.0° |
| 2025-12-08 Mon | 33 | 63 | 21 | 19:00–19:20 (good, 0.33 h) | 87.1° 13:50 | 11.44 | 79% | 112.6° |
| 2025-12-09 Tue | 31 | 1 | 0 | — | 87.1° 13:45 | 11.45 | 70% | 109.9° |
| 2025-12-10 Wed | 29 | 7 | 2 | — | 87.1° 13:40 | 11.46 | 60% | 106.2° |
| 2025-12-11 Thu | 29 | 99 | 29 | 18:35–19:35 (good, 1.0 h) | 87.1° 13:35 | 11.47 | 49% | 101.9° |
| 2025-12-12 Fri | 27 | 98 | 26 | 18:35–19:30 (good, 0.92 h) | 87.1° 13:35 | 11.47 | 40% | 97.3° |
| 2025-12-13 Sat | 26 | 59 | 15 | 18:35–19:40 (marginal, 1.08 h) | 87.1° 13:30 | 11.48 | 30% | 92.4° |
| 2025-12-14 Sun | 25 | 100 | 25 | 18:35–19:25 (good, 0.83 h) | 87.1° 13:25 | 11.49 | 22% | 87.5° |
| 2025-12-15 Mon | 24 | 100 | 24 | 18:35–19:20 (good, 0.75 h) | 87.1° 13:20 | 11.49 | 15% | 82.7° |
| 2025-12-16 Tue | 23 | 98 | 22 | 18:35–19:15 (good, 0.67 h) | 87.1° 13:15 | 11.5 | 9% | 78.3° |
| 2025-12-17 Wed | 22 | 90 | 20 | 18:35–19:15 (good, 0.67 h) | 87.1° 13:15 | 11.5 | 4% | 74.2° |
| 2025-12-18 Thu | 20 | 1 | 0 | — | 87.1° 13:10 | 11.5 | 1% | 70.8° |
| 2025-12-19 Fri | 19 | 88 | 17 | 18:35–19:00 (good, 0.42 h) | 87.1° 13:05 | 11.51 | 0% | 68.1° |
| 2025-12-20 Sat | 18 | 56 | 10 | 18:35–18:50 (good, 0.25 h) | 87.1° 13:00 | 11.51 | 1% | 66.4° |
| 2025-12-21 Sun | 16 | 3 | 0 | — | 87.1° 13:00 | 11.51 | 3% | 65.8° |
| 2025-12-22 Mon | 14 | 65 | 9 | 18:35–19:20 (marginal, 0.75 h) | 87.1° 12:55 | 11.51 | 8% | 66.3° |
| 2025-12-23 Tue | 12 | 11 | 1 | — | 87.1° 12:50 | 11.51 | 14% | 68.0° |
| 2025-12-24 Wed | 10 | 0 | 0 | — | 87.1° 12:45 | 11.5 | 21% | 70.9° |
| 2025-12-25 Thu | 9 | 7 | 1 | — | 87.1° 12:40 | 11.5 | 30% | 74.7° |
| 2025-12-26 Fri | 8 | 54 | 4 | 18:40–19:00 (marginal, 0.33 h) | 87.1° 12:40 | 11.5 | 41% | 79.3° |
| 2025-12-27 Sat | 7 | 100 | 7 | 18:40–19:05 (marginal, 0.42 h) | 87.1° 12:35 | 11.49 | 51% | 84.5° |
| 2025-12-28 Sun | 7 | 48 | 3 | 06:30–06:45 (marginal, 0.25 h) | 87.1° 12:30 | 11.48 | 62% | 90.2° |
| 2025-12-29 Mon | 7 | 100 | 7 | 05:55–06:10 (marginal, 0.25 h) | 87.1° 12:25 | 11.48 | 73% | 96.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-11-30&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.