← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-11-23 Sun | 100 | 99 | 99 | 19:00–05:05 (good, 10.08 h) | 72.5° 23:55 | 11.17 | 12% | 138.2° |
| 2025-11-24 Mon | 100 | 71 | 71 | 18:50–02:00 (good, 7.17 h) | 72.5° 23:55 | 11.2 | 18% | 126.1° |
| 2025-11-25 Tue | 100 | 0 | 0 | — | 72.5° 23:50 | 11.22 | 27% | 113.8° |
| 2025-11-26 Wed | 100 | 3 | 3 | 21:00–22:00 (marginal, 1.0 h) | 72.5° 23:45 | 11.24 | 36% | 101.2° |
| 2025-11-27 Thu | 100 | 0 | 0 | — | 72.5° 23:40 | 11.26 | 46% | 88.4° |
| 2025-11-28 Fri | 100 | 0 | 0 | — | 72.5° 23:35 | 11.28 | 57% | 75.1° |
| 2025-11-29 Sat | 99 | 0 | 0 | — | 72.5° 23:35 | 11.3 | 67% | 61.5° |
| 2025-11-30 Sun | 89 | 0 | 0 | — | 72.5° 23:30 | 11.32 | 78% | 47.4° |
| 2025-12-01 Mon | 77 | 64 | 49 | 19:00–02:00 (marginal, 7.0 h) | 72.5° 23:25 | 11.34 | 86% | 32.8° |
| 2025-12-02 Tue | 37 | 54 | 20 | 02:00–04:40 (marginal, 2.67 h) | 72.5° 23:20 | 11.35 | 94% | 17.9° |
| 2025-12-03 Wed | 24 | 8 | 2 | — | 72.5° 23:15 | 11.37 | 98% | 2.8° |
| 2025-12-04 Thu | 24 | 0 | 0 | — | 72.5° 23:15 | 11.38 | 100% | 12.6° |
| 2025-12-05 Fri | 30 | 0 | 0 | — | 72.5° 23:10 | 11.4 | 98% | 27.8° |
| 2025-12-06 Sat | 53 | 0 | 0 | — | 72.5° 23:05 | 11.41 | 94% | 42.8° |
| 2025-12-07 Sun | 89 | 2 | 2 | — | 72.5° 23:00 | 11.42 | 88% | 57.3° |
| 2025-12-08 Mon | 98 | 15 | 15 | 19:00–20:00 (good, 1.0 h) | 72.5° 23:00 | 11.44 | 79% | 71.5° |
| 2025-12-09 Tue | 100 | 10 | 10 | 23:00–01:00 (marginal, 2.0 h) | 72.5° 22:55 | 11.45 | 70% | 85.1° |
| 2025-12-10 Wed | 100 | 24 | 24 | 03:00–03:10 (good, 0.17 h) | 72.5° 22:50 | 11.46 | 60% | 98.3° |
| 2025-12-11 Thu | 100 | 43 | 43 | 18:35–22:00 (good, 3.42 h) | 72.5° 22:45 | 11.47 | 49% | 111.0° |
| 2025-12-12 Fri | 100 | 58 | 58 | 18:35–23:00 (good, 4.42 h) | 72.5° 22:40 | 11.47 | 40% | 123.4° |
| 2025-12-13 Sat | 100 | 15 | 15 | 18:35–20:00 (marginal, 1.42 h) | 72.5° 22:40 | 11.48 | 30% | 135.6° |
| 2025-12-14 Sun | 100 | 63 | 63 | 18:35–22:00 (good, 3.42 h) | 72.5° 22:35 | 11.49 | 22% | 147.5° |
| 2025-12-15 Mon | 100 | 100 | 100 | 18:35–03:40 (good, 9.08 h) | 72.5° 22:30 | 11.49 | 15% | 159.4° |
| 2025-12-16 Tue | 100 | 92 | 92 | 18:35–02:25 (good, 7.83 h) | 72.5° 22:25 | 11.5 | 9% | 171.2° |
| 2025-12-17 Wed | 100 | 67 | 67 | 18:35–23:00 (good, 4.42 h) | 72.5° 22:20 | 11.5 | 4% | 176.9° |
| 2025-12-18 Thu | 100 | 0 | 0 | — | 72.5° 22:20 | 11.5 | 1% | 165.1° |
| 2025-12-19 Fri | 100 | 92 | 92 | 18:35–03:00 (good, 8.42 h) | 72.5° 22:15 | 11.51 | 0% | 153.1° |
| 2025-12-20 Sat | 100 | 7 | 7 | 18:35–19:00 (good, 0.42 h) | 72.5° 22:10 | 11.51 | 1% | 141.1° |
| 2025-12-21 Sun | 100 | 0 | 0 | — | 72.5° 22:05 | 11.51 | 3% | 128.9° |
| 2025-12-22 Mon | 100 | 14 | 14 | 18:35–20:00 (good, 1.42 h) | 72.5° 22:00 | 11.51 | 8% | 116.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-11-23&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.