← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-08-19 Tue | 100 | 0 | 0 | — | 79.1° 05:00 | 6.89 | 13% | 72.0° |
| 2025-08-20 Wed | 100 | 100 | 100 | 23:30–04:55 (good, 5.42 h) | 79.1° 05:00 | 6.94 | 6% | 85.2° |
| 2025-08-21 Thu | 100 | 100 | 100 | 23:25–04:55 (good, 5.5 h) | 79.1° 04:55 | 7.0 | 2% | 98.1° |
| 2025-08-22 Fri | 100 | 100 | 100 | 23:25–05:00 (good, 5.58 h) | 79.1° 04:50 | 7.06 | 0% | 110.9° |
| 2025-08-23 Sat | 100 | 88 | 88 | 00:35–05:00 (good, 4.42 h) | 79.1° 04:45 | 7.12 | 0% | 123.2° |
| 2025-08-24 Sun | 100 | 96 | 96 | 23:15–05:00 (good, 5.75 h) | 79.1° 04:40 | 7.17 | 3% | 135.2° |
| 2025-08-25 Mon | 100 | 88 | 88 | 00:00–05:05 (good, 5.08 h) | 79.1° 04:40 | 7.23 | 7% | 146.4° |
| 2025-08-26 Tue | 100 | 69 | 69 | 01:00–05:05 (good, 4.08 h) | 79.1° 04:35 | 7.29 | 13% | 156.4° |
| 2025-08-27 Wed | 100 | 100 | 100 | 23:05–05:05 (good, 6.0 h) | 79.1° 04:30 | 7.34 | 20% | 163.4° |
| 2025-08-28 Thu | 100 | 100 | 100 | 23:00–05:05 (good, 6.08 h) | 79.1° 04:25 | 7.4 | 28% | 163.3° |
| 2025-08-29 Fri | 100 | 100 | 100 | 22:55–05:10 (good, 6.25 h) | 79.1° 04:20 | 7.46 | 37% | 156.4° |
| 2025-08-30 Sat | 100 | 64 | 64 | 23:00–04:00 (good, 5.0 h) | 79.1° 04:20 | 7.51 | 47% | 146.7° |
| 2025-08-31 Sun | 100 | 100 | 100 | 22:55–05:10 (good, 6.25 h) | 79.1° 04:15 | 7.57 | 56% | 136.0° |
| 2025-09-01 Mon | 100 | 99 | 99 | 22:55–05:10 (good, 6.25 h) | 79.1° 04:10 | 7.62 | 66% | 124.7° |
| 2025-09-02 Tue | 100 | 100 | 100 | 22:50–05:15 (good, 6.42 h) | 79.1° 04:05 | 7.68 | 75% | 112.9° |
| 2025-09-03 Wed | 100 | 42 | 42 | 02:00–03:00 (good, 1.0 h) | 79.1° 04:05 | 7.74 | 83% | 100.7° |
| 2025-09-04 Thu | 100 | 42 | 42 | 04:00–05:15 (good, 1.25 h) | 79.1° 04:00 | 7.79 | 90% | 88.1° |
| 2025-09-05 Fri | 100 | 16 | 16 | 04:55–05:00 (good, 0.08 h) | 79.1° 03:55 | 7.85 | 96% | 75.2° |
| 2025-09-06 Sat | 67 | 86 | 58 | 05:00–05:20 (good, 0.33 h) | 79.1° 03:50 | 7.9 | 99% | 61.9° |
| 2025-09-07 Sun | 47 | 0 | 0 | — | 79.1° 03:45 | 7.96 | 100% | 48.6° |
| 2025-09-08 Mon | 29 | 64 | 18 | 02:00–05:20 (marginal, 3.33 h) | 79.1° 03:45 | 8.01 | 98% | 35.4° |
| 2025-09-09 Tue | 26 | 98 | 26 | 22:10–03:00 (marginal, 4.83 h) | 79.1° 03:40 | 8.06 | 94% | 23.3° |
| 2025-09-10 Wed | 34 | 67 | 23 | 22:00–00:00 (marginal, 2.0 h) | 79.1° 03:35 | 8.12 | 87% | 15.9° |
| 2025-09-11 Thu | 46 | 33 | 15 | 02:00–05:00 (marginal, 3.0 h) | 79.1° 03:30 | 8.17 | 78% | 19.4° |
| 2025-09-12 Fri | 62 | 24 | 15 | 04:00–05:25 (marginal, 1.42 h) | 79.1° 03:25 | 8.23 | 67% | 30.1° |
| 2025-09-13 Sat | 83 | 98 | 81 | 22:00–05:30 (good, 7.5 h) | 79.1° 03:25 | 8.28 | 56% | 42.7° |
| 2025-09-14 Sun | 90 | 31 | 27 | 02:00–04:00 (good, 2.0 h) | 79.1° 03:20 | 8.33 | 44% | 55.8° |
| 2025-09-15 Mon | 99 | 100 | 99 | 21:50–05:30 (good, 7.67 h) | 79.1° 03:15 | 8.38 | 34% | 68.9° |
| 2025-09-16 Tue | 100 | 100 | 100 | 21:45–05:30 (good, 7.75 h) | 79.1° 03:10 | 8.44 | 24% | 81.8° |
| 2025-09-17 Wed | 100 | 92 | 92 | 21:50–05:35 (good, 7.75 h) | 79.1° 03:10 | 8.49 | 15% | 94.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-08-19&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.