← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-07-21 Mon | 100 | 100 | 100 | 22:50–04:10 (good, 5.33 h) | 71.1° 01:25 | 5.28 | 11% | 116.3° |
| 2025-07-22 Tue | 100 | 100 | 100 | 22:50–04:10 (good, 5.33 h) | 71.1° 01:20 | 5.33 | 5% | 124.3° |
| 2025-07-23 Wed | 100 | 92 | 92 | 22:50–04:10 (good, 5.33 h) | 71.1° 01:15 | 5.38 | 1% | 130.4° |
| 2025-07-24 Thu | 100 | 99 | 99 | 22:45–04:15 (good, 5.5 h) | 71.1° 01:10 | 5.43 | 0% | 134.0° |
| 2025-07-25 Fri | 100 | 100 | 100 | 22:45–04:15 (good, 5.5 h) | 71.1° 01:05 | 5.48 | 2% | 134.4° |
| 2025-07-26 Sat | 100 | 100 | 100 | 22:45–04:15 (good, 5.5 h) | 71.1° 01:05 | 5.54 | 5% | 131.9° |
| 2025-07-27 Sun | 100 | 97 | 97 | 22:45–04:20 (good, 5.58 h) | 71.1° 01:00 | 5.59 | 11% | 127.0° |
| 2025-07-28 Mon | 100 | 99 | 99 | 22:40–04:20 (good, 5.67 h) | 71.1° 00:55 | 5.64 | 18% | 120.6° |
| 2025-07-29 Tue | 100 | 90 | 90 | 22:40–04:20 (good, 5.67 h) | 71.1° 00:50 | 5.7 | 26% | 113.2° |
| 2025-07-30 Wed | 100 | 0 | 0 | — | 71.1° 00:50 | 5.75 | 35% | 105.2° |
| 2025-07-31 Thu | 100 | 7 | 7 | 04:00–04:25 (marginal, 0.42 h) | 71.1° 00:45 | 5.81 | 44% | 97.0° |
| 2025-08-01 Fri | 100 | 86 | 86 | 22:35–04:25 (good, 5.83 h) | 71.1° 00:40 | 5.86 | 54% | 88.7° |
| 2025-08-02 Sat | 100 | 100 | 100 | 22:35–04:25 (good, 5.83 h) | 71.1° 00:35 | 5.92 | 63% | 80.4° |
| 2025-08-03 Sun | 100 | 99 | 99 | 22:30–04:30 (good, 6.0 h) | 71.1° 00:30 | 5.97 | 72% | 72.3° |
| 2025-08-04 Mon | 100 | 44 | 44 | 02:00–04:00 (good, 2.0 h) | 71.1° 00:30 | 6.03 | 80% | 64.5° |
| 2025-08-05 Tue | 97 | 67 | 65 | 00:00–02:00 (good, 2.0 h) | 71.1° 00:25 | 6.08 | 88% | 57.4° |
| 2025-08-06 Wed | 90 | 38 | 34 | 03:40–04:35 (good, 0.92 h) | 71.1° 00:20 | 6.14 | 94% | 51.4° |
| 2025-08-07 Thu | 56 | 32 | 18 | 04:00–04:35 (marginal, 0.58 h) | 71.1° 00:15 | 6.2 | 98% | 47.1° |
| 2025-08-08 Fri | 50 | 100 | 50 | 22:20–04:35 (marginal, 6.25 h) | 71.1° 00:10 | 6.25 | 100% | 45.4° |
| 2025-08-09 Sat | 51 | 100 | 51 | 22:20–04:40 (marginal, 6.33 h) | 71.1° 00:10 | 6.31 | 100% | 46.7° |
| 2025-08-10 Sun | 57 | 100 | 57 | 22:20–22:55 (good, 0.58 h) | 71.1° 00:05 | 6.37 | 97% | 50.9° |
| 2025-08-11 Mon | 69 | 100 | 69 | 22:15–00:15 (good, 2.0 h) | 71.1° 00:00 | 6.43 | 92% | 57.6° |
| 2025-08-12 Tue | 76 | 100 | 76 | 22:15–02:10 (good, 3.92 h) | 71.1° 23:55 | 6.48 | 84% | 65.8° |
| 2025-08-13 Wed | 100 | 100 | 100 | 22:10–03:25 (good, 5.25 h) | 71.1° 23:55 | 6.54 | 75% | 75.1° |
| 2025-08-14 Thu | 100 | 86 | 86 | 22:10–03:20 (good, 5.17 h) | 71.1° 23:50 | 6.6 | 65% | 84.9° |
| 2025-08-15 Fri | 100 | 99 | 99 | 22:10–04:35 (good, 6.42 h) | 71.1° 23:45 | 6.66 | 53% | 94.9° |
| 2025-08-16 Sat | 100 | 99 | 99 | 22:05–04:35 (good, 6.5 h) | 71.1° 23:40 | 6.71 | 42% | 104.7° |
| 2025-08-17 Sun | 100 | 96 | 96 | 22:05–04:35 (good, 6.5 h) | 71.1° 23:35 | 6.77 | 31% | 113.9° |
| 2025-08-18 Mon | 100 | 45 | 45 | 00:00–02:00 (good, 2.0 h) | 71.1° 23:35 | 6.83 | 21% | 122.1° |
| 2025-08-19 Tue | 100 | 0 | 0 | — | 71.1° 23:30 | 6.89 | 13% | 128.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-07-21&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.