← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-08-26 Wed | 61 | 94 | 58 | 21:45–05:05 (marginal, 7.33 h) | 87.3° 00:00 | 7.27 | 98% | 60.6° |
| 2026-08-27 Thu | 60 | 97 | 58 | 21:45–05:05 (marginal, 7.33 h) | 87.3° 23:55 | 7.33 | 100% | 57.6° |
| 2026-08-28 Fri | 61 | 92 | 56 | 21:45–05:05 (marginal, 7.33 h) | 87.3° 23:55 | 7.39 | 99% | 56.2° |
| 2026-08-29 Sat | 64 | 20 | 13 | 21:40–23:00 (marginal, 1.33 h) | 87.3° 23:50 | 7.44 | 97% | 56.8° |
| 2026-08-30 Sun | 69 | 98 | 67 | 22:00–22:45 (good, 0.75 h) | 87.3° 23:45 | 7.5 | 92% | 59.4° |
| 2026-08-31 Mon | 75 | 99 | 74 | 21:35–01:05 (good, 3.5 h) | 87.3° 23:40 | 7.56 | 85% | 63.7° |
| 2026-09-01 Tue | 100 | 88 | 88 | 21:35–03:00 (good, 5.42 h) | 87.3° 23:35 | 7.61 | 76% | 69.5° |
| 2026-09-02 Wed | 100 | 7 | 7 | — | 87.3° 23:35 | 7.67 | 66% | 76.4° |
| 2026-09-03 Thu | 100 | 88 | 88 | 21:30–04:00 (good, 6.5 h) | 87.3° 23:30 | 7.72 | 55% | 83.9° |
| 2026-09-04 Fri | 100 | 97 | 97 | 21:30–05:15 (good, 7.75 h) | 87.3° 23:25 | 7.78 | 43% | 91.7° |
| 2026-09-05 Sat | 100 | 100 | 100 | 21:25–05:15 (good, 7.83 h) | 87.3° 23:20 | 7.83 | 32% | 99.5° |
| 2026-09-06 Sun | 100 | 99 | 99 | 21:25–05:20 (good, 7.92 h) | 87.3° 23:15 | 7.89 | 22% | 106.9° |
| 2026-09-07 Mon | 100 | 100 | 100 | 21:25–05:20 (good, 7.92 h) | 87.3° 23:15 | 7.94 | 13% | 113.5° |
| 2026-09-08 Tue | 100 | 100 | 100 | 21:20–05:20 (good, 8.0 h) | 87.3° 23:10 | 8.0 | 6% | 118.8° |
| 2026-09-09 Wed | 100 | 88 | 88 | 21:20–05:00 (good, 7.67 h) | 87.3° 23:05 | 8.05 | 2% | 122.4° |
| 2026-09-10 Thu | 100 | 99 | 99 | 21:15–05:20 (good, 8.08 h) | 87.3° 23:00 | 8.11 | 0% | 123.8° |
| 2026-09-11 Fri | 100 | 99 | 99 | 21:15–05:15 (good, 8.0 h) | 87.3° 22:55 | 8.16 | 1% | 123.0° |
| 2026-09-12 Sat | 100 | 0 | 0 | — | 87.3° 22:55 | 8.21 | 4% | 120.2° |
| 2026-09-13 Sun | 100 | 87 | 87 | 21:10–05:05 (good, 7.92 h) | 87.3° 22:50 | 8.27 | 9% | 115.9° |
| 2026-09-14 Mon | 100 | 41 | 41 | 00:00–03:00 (good, 3.0 h) | 87.3° 22:45 | 8.32 | 15% | 110.5° |
| 2026-09-15 Tue | 100 | 72 | 72 | 22:00–05:00 (good, 7.0 h) | 87.3° 22:40 | 8.37 | 23% | 104.4° |
| 2026-09-16 Wed | 100 | 97 | 97 | 21:05–05:00 (good, 7.92 h) | 87.3° 22:40 | 8.42 | 32% | 98.0° |
| 2026-09-17 Thu | 100 | 100 | 100 | 21:05–04:55 (good, 7.83 h) | 87.3° 22:35 | 8.48 | 41% | 91.4° |
| 2026-09-18 Fri | 100 | 87 | 87 | 21:00–04:45 (good, 7.75 h) | 87.3° 22:30 | 8.53 | 51% | 84.8° |
| 2026-09-19 Sat | 100 | 84 | 84 | 21:00–02:25 (good, 5.42 h) | 87.3° 22:25 | 8.58 | 60% | 78.4° |
| 2026-09-20 Sun | 100 | 98 | 98 | 21:00–04:40 (good, 7.67 h) | 87.3° 22:20 | 8.63 | 69% | 72.3° |
| 2026-09-21 Mon | 92 | 0 | 0 | — | 87.3° 22:20 | 8.68 | 78% | 66.7° |
| 2026-09-22 Tue | 84 | 21 | 18 | 04:00–04:25 (good, 0.42 h) | 87.3° 22:15 | 8.73 | 85% | 62.0° |
| 2026-09-23 Wed | 61 | 89 | 54 | 20:50–05:05 (marginal, 8.25 h) | 87.3° 22:10 | 8.78 | 92% | 58.5° |
| 2026-09-24 Thu | 58 | 85 | 49 | 20:50–04:00 (marginal, 7.17 h) | 87.3° 22:05 | 8.84 | 96% | 56.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-08-26&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.