← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-06-21 Sat | 100 | 83 | 83 | 00:00–03:40 (good, 3.67 h) | 87.3° 04:20 | 4.42 | 17% | 72.5° |
| 2025-06-22 Sun | 100 | 100 | 100 | 23:15–03:40 (good, 4.42 h) | 87.3° 04:15 | 4.42 | 9% | 79.6° |
| 2025-06-23 Mon | 100 | 100 | 100 | 23:15–03:40 (good, 4.42 h) | 87.3° 04:10 | 4.43 | 3% | 87.2° |
| 2025-06-24 Tue | 100 | 100 | 100 | 23:15–03:40 (good, 4.42 h) | 87.3° 04:05 | 4.44 | 1% | 95.0° |
| 2025-06-25 Wed | 100 | 100 | 100 | 23:15–03:40 (good, 4.42 h) | 87.3° 04:05 | 4.45 | 0% | 102.4° |
| 2025-06-26 Thu | 100 | 100 | 100 | 23:15–03:40 (good, 4.42 h) | 87.3° 04:00 | 4.46 | 3% | 109.0° |
| 2025-06-27 Fri | 100 | 78 | 78 | 23:15–03:40 (good, 4.42 h) | 87.3° 03:55 | 4.47 | 8% | 114.6° |
| 2025-06-28 Sat | 100 | 38 | 38 | 03:00–03:40 (good, 0.67 h) | 87.3° 03:50 | 4.48 | 15% | 118.7° |
| 2025-06-29 Sun | 100 | 100 | 100 | 23:10–03:40 (good, 4.5 h) | 87.3° 03:45 | 4.5 | 23% | 121.2° |
| 2025-06-30 Mon | 100 | 94 | 94 | 23:10–03:45 (good, 4.58 h) | 87.3° 03:45 | 4.52 | 32% | 121.9° |
| 2025-07-01 Tue | 100 | 88 | 88 | 00:00–03:45 (good, 3.75 h) | 87.3° 03:40 | 4.54 | 42% | 121.0° |
| 2025-07-02 Wed | 100 | 100 | 100 | 23:10–03:45 (good, 4.58 h) | 87.3° 03:35 | 4.56 | 51% | 118.5° |
| 2025-07-03 Thu | 100 | 100 | 100 | 23:10–03:45 (good, 4.58 h) | 87.3° 03:30 | 4.59 | 61% | 114.9° |
| 2025-07-04 Fri | 100 | 100 | 100 | 23:10–03:45 (good, 4.58 h) | 87.3° 03:30 | 4.62 | 70% | 110.3° |
| 2025-07-05 Sat | 100 | 100 | 100 | 23:10–03:50 (good, 4.67 h) | 87.3° 03:25 | 4.64 | 78% | 104.9° |
| 2025-07-06 Sun | 100 | 99 | 99 | 23:10–03:50 (good, 4.67 h) | 87.3° 03:20 | 4.67 | 85% | 99.0° |
| 2025-07-07 Mon | 100 | 99 | 99 | 23:10–03:50 (good, 4.67 h) | 87.3° 03:15 | 4.7 | 91% | 92.7° |
| 2025-07-08 Tue | 80 | 100 | 80 | 23:05–03:50 (good, 4.75 h) | 87.3° 03:10 | 4.74 | 96% | 86.2° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-06-21&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.