← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-08-18 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° |
| 2025-08-20 Wed | 100 | 99 | 99 | 22:00–04:30 (good, 6.5 h) | 71.1° 23:25 | 6.94 | 6% | 133.1° |
| 2025-08-21 Thu | 100 | 100 | 100 | 21:55–04:25 (good, 6.5 h) | 71.1° 23:20 | 7.0 | 2% | 134.6° |
| 2025-08-22 Fri | 100 | 96 | 96 | 21:55–04:25 (good, 6.5 h) | 71.1° 23:15 | 7.06 | 0% | 133.1° |
| 2025-08-23 Sat | 100 | 82 | 82 | 21:55–04:20 (good, 6.42 h) | 71.1° 23:15 | 7.12 | 0% | 129.0° |
| 2025-08-24 Sun | 100 | 92 | 92 | 22:00–04:10 (good, 6.17 h) | 71.1° 23:10 | 7.17 | 3% | 123.0° |
| 2025-08-25 Mon | 100 | 77 | 77 | 23:00–04:10 (good, 5.17 h) | 71.1° 23:05 | 7.23 | 7% | 115.9° |
| 2025-08-26 Tue | 100 | 42 | 42 | 01:00–04:10 (good, 3.17 h) | 71.1° 23:00 | 7.29 | 13% | 108.1° |
| 2025-08-27 Wed | 100 | 100 | 100 | 21:45–04:05 (good, 6.33 h) | 71.1° 23:00 | 7.34 | 20% | 99.9° |
| 2025-08-28 Thu | 100 | 100 | 100 | 21:45–04:00 (good, 6.25 h) | 71.1° 22:55 | 7.4 | 28% | 91.6° |
| 2025-08-29 Fri | 100 | 100 | 100 | 21:40–03:55 (good, 6.25 h) | 71.1° 22:50 | 7.46 | 37% | 83.3° |
| 2025-08-30 Sat | 100 | 72 | 72 | 23:00–02:05 (good, 3.08 h) | 71.1° 22:45 | 7.51 | 47% | 75.1° |
| 2025-08-31 Sun | 100 | 99 | 99 | 21:35–03:50 (good, 6.25 h) | 71.1° 22:40 | 7.57 | 56% | 67.3° |
| 2025-09-01 Mon | 100 | 96 | 96 | 22:00–03:45 (good, 5.75 h) | 71.1° 22:40 | 7.62 | 66% | 60.0° |
| 2025-09-02 Tue | 93 | 100 | 93 | 21:35–03:40 (good, 6.08 h) | 71.1° 22:35 | 7.68 | 75% | 53.5° |
| 2025-09-03 Wed | 85 | 32 | 27 | 02:30–02:35 (good, 0.08 h) | 71.1° 22:30 | 7.74 | 83% | 48.6° |
| 2025-09-04 Thu | 54 | 28 | 15 | 22:00–23:00 (marginal, 1.0 h) | 71.1° 22:25 | 7.79 | 90% | 45.8° |
| 2025-09-05 Fri | 46 | 0 | 0 | — | 71.1° 22:20 | 7.85 | 96% | 45.8° |
| 2025-09-06 Sat | 44 | 93 | 41 | 21:25–03:00 (marginal, 5.58 h) | 71.1° 22:20 | 7.9 | 99% | 49.0° |
| 2025-09-07 Sun | 47 | 0 | 0 | — | 71.1° 22:15 | 7.96 | 100% | 54.9° |
| 2025-09-08 Mon | 57 | 35 | 20 | 01:00–03:20 (marginal, 2.33 h) | 71.1° 22:10 | 8.01 | 98% | 62.9° |
| 2025-09-09 Tue | 71 | 98 | 70 | 21:20–00:15 (good, 2.92 h) | 71.1° 22:05 | 8.06 | 94% | 72.1° |
| 2025-09-10 Wed | 80 | 71 | 56 | 22:00–00:00 (good, 2.0 h) | 71.1° 22:05 | 8.12 | 87% | 82.1° |
| 2025-09-11 Thu | 100 | 16 | 16 | 02:00–03:30 (marginal, 1.5 h) | 71.1° 22:00 | 8.17 | 78% | 92.3° |
| 2025-09-12 Fri | 100 | 19 | 19 | 21:15–22:00 (good, 0.75 h) | 71.1° 21:55 | 8.23 | 67% | 102.3° |
| 2025-09-13 Sat | 100 | 92 | 92 | 21:10–02:45 (good, 5.58 h) | 71.1° 21:50 | 8.28 | 56% | 111.8° |
| 2025-09-14 Sun | 100 | 31 | 31 | 21:10–22:00 (good, 0.83 h) | 71.1° 21:45 | 8.33 | 44% | 120.3° |
| 2025-09-15 Mon | 100 | 99 | 99 | 21:05–02:45 (good, 5.67 h) | 71.1° 21:45 | 8.38 | 34% | 127.3° |
| 2025-09-16 Tue | 100 | 100 | 100 | 21:05–02:45 (good, 5.67 h) | 71.1° 21:40 | 8.44 | 24% | 132.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-08-18&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.