← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-08-22 Fri | 100 | 95 | 95 | 21:55–03:55 (good, 6.0 h) | 87.1° 21:55 | 7.06 | 0% | 109.1° |
| 2025-08-23 Sat | 100 | 80 | 80 | 21:55–03:50 (good, 5.92 h) | 87.1° 21:50 | 7.12 | 0% | 105.4° |
| 2025-08-24 Sun | 100 | 92 | 92 | 22:00–03:45 (good, 5.75 h) | 87.1° 21:45 | 7.17 | 3% | 101.2° |
| 2025-08-25 Mon | 100 | 75 | 75 | 23:00–03:35 (good, 4.58 h) | 87.1° 21:40 | 7.23 | 7% | 96.5° |
| 2025-08-26 Tue | 100 | 38 | 38 | 01:00–03:35 (good, 2.58 h) | 87.1° 21:40 | 7.29 | 13% | 91.7° |
| 2025-08-27 Wed | 100 | 100 | 100 | 21:45–03:35 (good, 5.83 h) | 87.1° 21:35 | 7.34 | 20% | 86.8° |
| 2025-08-28 Thu | 100 | 100 | 100 | 21:45–03:30 (good, 5.75 h) | 87.1° 21:30 | 7.4 | 28% | 82.2° |
| 2025-08-29 Fri | 100 | 100 | 100 | 21:40–03:25 (good, 5.75 h) | 87.1° 21:25 | 7.46 | 37% | 77.8° |
| 2025-08-30 Sat | 100 | 73 | 73 | 23:00–02:00 (good, 3.0 h) | 87.1° 21:20 | 7.51 | 47% | 74.0° |
| 2025-08-31 Sun | 100 | 99 | 99 | 21:35–03:15 (good, 5.67 h) | 87.1° 21:20 | 7.57 | 56% | 70.7° |
| 2025-09-01 Mon | 96 | 95 | 91 | 22:00–03:15 (good, 5.25 h) | 87.1° 21:15 | 7.62 | 66% | 68.2° |
| 2025-09-02 Tue | 88 | 100 | 88 | 21:35–03:10 (good, 5.58 h) | 87.1° 21:10 | 7.68 | 75% | 66.7° |
| 2025-09-03 Wed | 80 | 31 | 25 | 01:00–03:00 (marginal, 2.0 h) | 87.1° 21:05 | 7.74 | 83% | 66.4° |
| 2025-09-04 Thu | 65 | 31 | 20 | 22:00–00:00 (marginal, 2.0 h) | 87.1° 21:00 | 7.79 | 90% | 67.3° |
| 2025-09-05 Fri | 61 | 0 | 0 | — | 87.1° 21:00 | 7.85 | 96% | 69.5° |
| 2025-09-06 Sat | 60 | 95 | 57 | 21:25–23:40 (good, 2.25 h) | 87.1° 20:55 | 7.9 | 99% | 72.9° |
| 2025-09-07 Sun | 63 | 0 | 0 | — | 87.1° 20:50 | 7.96 | 100% | 77.4° |
| 2025-09-08 Mon | 71 | 32 | 23 | 01:00–03:05 (marginal, 2.08 h) | 87.1° 20:45 | 8.01 | 98% | 82.7° |
| 2025-09-09 Tue | 79 | 98 | 78 | 21:20–01:00 (good, 3.67 h) | 87.1° 20:45 | 8.06 | 94% | 88.5° |
| 2025-09-10 Wed | 84 | 71 | 60 | 22:00–00:00 (good, 2.0 h) | 87.1° 20:40 | 8.12 | 87% | 94.3° |
| 2025-09-11 Thu | 100 | 12 | 12 | 02:00–02:50 (marginal, 0.83 h) | 87.1° 20:35 | 8.17 | 78% | 99.9° |
| 2025-09-12 Fri | 100 | 21 | 21 | 21:15–22:00 (good, 0.75 h) | 87.1° 20:30 | 8.23 | 67% | 104.9° |
| 2025-09-13 Sat | 100 | 92 | 92 | 21:10–02:15 (good, 5.08 h) | 87.1° 20:25 | 8.28 | 56% | 108.9° |
| 2025-09-14 Sun | 100 | 28 | 28 | 21:10–22:00 (good, 0.83 h) | 87.1° 20:25 | 8.33 | 44% | 111.8° |
| 2025-09-15 Mon | 100 | 99 | 99 | 21:05–02:15 (good, 5.17 h) | 87.1° 20:20 | 8.38 | 34% | 113.4° |
| 2025-09-16 Tue | 100 | 100 | 100 | 21:05–02:10 (good, 5.08 h) | 87.1° 20:15 | 8.44 | 24% | 113.6° |
| 2025-09-17 Wed | 100 | 91 | 91 | 21:05–02:10 (good, 5.08 h) | 87.1° 20:10 | 8.49 | 15% | 112.4° |
| 2025-09-18 Thu | 100 | 100 | 100 | 21:00–02:05 (good, 5.08 h) | 87.1° 20:05 | 8.54 | 8% | 110.0° |
| 2025-09-19 Fri | 100 | 99 | 99 | 21:00–02:00 (good, 5.0 h) | 87.1° 20:05 | 8.59 | 4% | 106.6° |
| 2025-09-20 Sat | 100 | 63 | 63 | 21:00–23:00 (good, 2.0 h) | 87.1° 20:00 | 8.64 | 1% | 102.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-08-22&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.