← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-07-09 Wed | 75 | 99 | 74 | 23:05–03:50 (good, 4.75 h) | 87.3° 03:10 | 4.77 | 99% | 79.8° |
| 2025-07-10 Thu | 68 | 81 | 55 | 23:35–01:00 (good, 1.42 h) | 87.3° 03:05 | 4.81 | 100% | 73.6° |
| 2025-07-11 Fri | 62 | 41 | 25 | 02:00–03:55 (marginal, 1.92 h) | 87.3° 03:00 | 4.85 | 99% | 67.9° |
| 2025-07-12 Sat | 62 | 86 | 54 | 03:00–03:55 (good, 0.92 h) | 87.3° 02:55 | 4.88 | 95% | 63.2° |
| 2025-07-13 Sun | 65 | 46 | 30 | 00:00–01:00 (marginal, 1.0 h) | 87.3° 02:50 | 4.92 | 90% | 59.8° |
| 2025-07-14 Mon | 94 | 100 | 94 | 23:00–03:50 (good, 4.83 h) | 87.3° 02:50 | 4.97 | 82% | 58.1° |
| 2025-07-15 Tue | 97 | 90 | 88 | 23:00–03:00 (good, 4.0 h) | 87.3° 02:45 | 5.01 | 73% | 58.4° |
| 2025-07-16 Wed | 100 | 87 | 87 | 23:00–04:00 (good, 5.0 h) | 87.3° 02:40 | 5.05 | 62% | 60.8° |
| 2025-07-17 Thu | 100 | 49 | 49 | 01:00–03:00 (good, 2.0 h) | 87.3° 02:35 | 5.1 | 51% | 65.0° |
| 2025-07-18 Fri | 100 | 93 | 93 | 22:55–04:00 (good, 5.08 h) | 87.3° 02:35 | 5.14 | 40% | 70.6° |
| 2025-07-19 Sat | 100 | 100 | 100 | 22:55–04:05 (good, 5.17 h) | 87.3° 02:30 | 5.19 | 29% | 77.3° |
| 2025-07-20 Sun | 100 | 100 | 100 | 22:55–04:05 (good, 5.17 h) | 87.3° 02:25 | 5.24 | 19% | 84.6° |
| 2025-07-21 Mon | 100 | 100 | 100 | 22:50–04:10 (good, 5.33 h) | 87.3° 02:20 | 5.28 | 11% | 92.2° |
| 2025-07-22 Tue | 100 | 100 | 100 | 22:50–04:10 (good, 5.33 h) | 87.3° 02:15 | 5.33 | 5% | 99.7° |
| 2025-07-23 Wed | 100 | 92 | 92 | 22:50–04:10 (good, 5.33 h) | 87.3° 02:15 | 5.38 | 1% | 106.6° |
| 2025-07-24 Thu | 100 | 99 | 99 | 22:45–04:15 (good, 5.5 h) | 87.3° 02:10 | 5.43 | 0% | 112.6° |
| 2025-07-25 Fri | 100 | 100 | 100 | 22:45–04:15 (good, 5.5 h) | 87.3° 02:05 | 5.48 | 2% | 117.4° |
| 2025-07-26 Sat | 100 | 100 | 100 | 22:45–04:15 (good, 5.5 h) | 87.3° 02:00 | 5.54 | 5% | 120.6° |
| 2025-07-27 Sun | 100 | 96 | 96 | 22:45–04:20 (good, 5.58 h) | 87.3° 01:55 | 5.59 | 11% | 122.0° |
| 2025-07-28 Mon | 100 | 99 | 99 | 22:40–04:20 (good, 5.67 h) | 87.3° 01:55 | 5.64 | 18% | 121.7° |
| 2025-07-29 Tue | 100 | 90 | 90 | 22:40–04:20 (good, 5.67 h) | 87.3° 01:50 | 5.7 | 26% | 119.7° |
| 2025-07-30 Wed | 100 | 0 | 0 | — | 87.3° 01:45 | 5.75 | 35% | 116.4° |
| 2025-07-31 Thu | 100 | 8 | 8 | 04:00–04:25 (good, 0.42 h) | 87.3° 01:40 | 5.81 | 44% | 112.0° |
| 2025-08-01 Fri | 100 | 86 | 86 | 22:35–04:25 (good, 5.83 h) | 87.3° 01:40 | 5.86 | 54% | 106.9° |
| 2025-08-02 Sat | 100 | 100 | 100 | 22:35–04:25 (good, 5.83 h) | 87.3° 01:35 | 5.92 | 63% | 101.1° |
| 2025-08-03 Sun | 100 | 99 | 99 | 22:30–04:30 (good, 6.0 h) | 87.3° 01:30 | 5.97 | 72% | 94.9° |
| 2025-08-04 Mon | 100 | 44 | 44 | 02:00–04:00 (good, 2.0 h) | 87.3° 01:25 | 6.03 | 80% | 88.5° |
| 2025-08-05 Tue | 100 | 67 | 67 | 00:00–02:00 (good, 2.0 h) | 87.3° 01:20 | 6.08 | 88% | 82.0° |
| 2025-08-06 Wed | 100 | 38 | 38 | 02:00–04:35 (good, 2.58 h) | 87.3° 01:20 | 6.14 | 94% | 75.7° |
| 2025-08-07 Thu | 72 | 33 | 24 | 04:00–04:35 (good, 0.58 h) | 87.3° 01:15 | 6.2 | 98% | 69.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-07-09&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.