← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-11-16 Sun | 13 | 41 | 5 | 05:25–05:40 (marginal, 0.25 h) | 50.2° 09:05 | 10.99 | 10% | 14.5° |
| 2025-11-17 Mon | 15 | 0 | 0 | — | 50.2° 09:00 | 11.02 | 5% | 25.7° |
| 2025-11-18 Tue | 18 | 0 | 0 | — | 50.2° 08:55 | 11.05 | 2% | 37.2° |
| 2025-11-19 Wed | 19 | 0 | 0 | — | 50.2° 08:55 | 11.08 | 0% | 48.9° |
| 2025-11-20 Thu | 21 | 0 | 0 | — | 50.2° 08:50 | 11.1 | 0% | 60.6° |
| 2025-11-21 Fri | 22 | 0 | 0 | — | 50.2° 08:45 | 11.13 | 3% | 72.4° |
| 2025-11-22 Sat | 24 | 0 | 0 | — | 50.2° 08:40 | 11.15 | 6% | 84.2° |
| 2025-11-23 Sun | 26 | 100 | 26 | 04:50–05:45 (good, 0.92 h) | 50.2° 08:40 | 11.17 | 12% | 96.1° |
| 2025-11-24 Mon | 27 | 0 | 0 | — | 50.2° 08:35 | 11.2 | 18% | 108.2° |
| 2025-11-25 Tue | 28 | 0 | 0 | — | 50.2° 08:30 | 11.22 | 27% | 120.4° |
| 2025-11-26 Wed | 30 | 0 | 0 | — | 50.2° 08:25 | 11.24 | 36% | 132.8° |
| 2025-11-27 Thu | 33 | 0 | 0 | — | 50.2° 08:20 | 11.26 | 46% | 145.5° |
| 2025-11-28 Fri | 34 | 0 | 0 | — | 50.2° 08:20 | 11.28 | 57% | 158.3° |
| 2025-11-29 Sat | 35 | 0 | 0 | — | 50.2° 08:15 | 11.3 | 67% | 170.3° |
| 2025-11-30 Sun | 37 | 0 | 0 | — | 50.2° 08:10 | 11.32 | 78% | 170.4° |
| 2025-12-01 Mon | 39 | 0 | 0 | — | 50.2° 08:05 | 11.34 | 86% | 157.5° |
| 2025-12-02 Tue | 38 | 85 | 32 | 04:25–05:55 (good, 1.5 h) | 50.2° 08:00 | 11.35 | 94% | 143.0° |
| 2025-12-03 Wed | 35 | 0 | 0 | — | 50.2° 08:00 | 11.37 | 98% | 128.0° |
| 2025-12-04 Thu | 32 | 0 | 0 | — | 50.2° 07:55 | 11.38 | 100% | 112.9° |
| 2025-12-05 Fri | 25 | 0 | 0 | — | 50.2° 07:50 | 11.4 | 98% | 97.8° |
| 2025-12-06 Sat | 20 | 0 | 0 | — | 50.2° 07:45 | 11.41 | 94% | 82.9° |
| 2025-12-07 Sun | 17 | 0 | 0 | — | 50.2° 07:45 | 11.42 | 88% | 68.4° |
| 2025-12-08 Mon | 15 | 0 | 0 | — | 50.2° 07:40 | 11.44 | 79% | 54.4° |
| 2025-12-09 Tue | 15 | 0 | 0 | — | 50.2° 07:35 | 11.45 | 70% | 40.9° |
| 2025-12-10 Wed | 18 | 63 | 11 | 03:45–05:00 (marginal, 1.25 h) | 50.2° 07:30 | 11.46 | 60% | 28.1° |
| 2025-12-11 Thu | 25 | 74 | 19 | 04:00–06:00 (marginal, 2.0 h) | 50.2° 07:25 | 11.47 | 49% | 16.0° |
| 2025-12-12 Fri | 32 | 0 | 0 | — | 50.2° 07:25 | 11.47 | 40% | 7.1° |
| 2025-12-13 Sat | 41 | 11 | 5 | 06:00–06:05 (marginal, 0.08 h) | 50.2° 07:20 | 11.48 | 30% | 12.0° |
| 2025-12-14 Sun | 49 | 100 | 49 | 03:35–06:05 (good, 2.5 h) | 50.2° 07:15 | 11.49 | 22% | 22.9° |
| 2025-12-15 Mon | 58 | 100 | 58 | 03:25–06:05 (good, 2.67 h) | 50.2° 07:10 | 11.49 | 15% | 34.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-11-16&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.