← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-08-11 Tue | 100 | 100 | 100 | 00:05–04:40 (good, 4.58 h) | 79.1° 05:35 | 6.41 | 1% | 94.2° |
| 2026-08-12 Wed | 100 | 98 | 98 | 00:05–04:45 (good, 4.67 h) | 79.1° 05:30 | 6.47 | 0% | 108.3° |
| 2026-08-13 Thu | 100 | 14 | 14 | 23:30–01:00 (marginal, 1.5 h) | 79.1° 05:25 | 6.53 | 2% | 122.0° |
| 2026-08-14 Fri | 100 | 59 | 59 | 00:05–01:00 (good, 0.92 h) | 79.1° 05:20 | 6.58 | 6% | 135.2° |
| 2026-08-15 Sat | 100 | 100 | 100 | 23:50–04:45 (good, 4.92 h) | 79.1° 05:20 | 6.64 | 12% | 147.5° |
| 2026-08-16 Sun | 100 | 100 | 100 | 23:45–04:50 (good, 5.08 h) | 79.1° 05:15 | 6.7 | 20% | 158.3° |
| 2026-08-17 Mon | 100 | 100 | 100 | 23:45–04:50 (good, 5.08 h) | 79.1° 05:10 | 6.76 | 29% | 165.0° |
| 2026-08-18 Tue | 100 | 56 | 56 | 00:00–02:00 (good, 2.0 h) | 79.1° 05:05 | 6.81 | 39% | 162.9° |
| 2026-08-19 Wed | 100 | 100 | 100 | 23:35–04:55 (good, 5.33 h) | 79.1° 05:05 | 6.87 | 48% | 154.6° |
| 2026-08-20 Thu | 100 | 99 | 99 | 23:35–04:55 (good, 5.33 h) | 79.1° 05:00 | 6.93 | 58% | 144.3° |
| 2026-08-21 Fri | 100 | 100 | 100 | 23:35–04:55 (good, 5.33 h) | 79.1° 04:55 | 6.99 | 67% | 133.4° |
| 2026-08-22 Sat | 100 | 90 | 90 | 01:00–05:00 (good, 4.0 h) | 79.1° 04:50 | 7.04 | 76% | 122.2° |
| 2026-08-23 Sun | 100 | 87 | 87 | 23:45–05:00 (good, 5.25 h) | 79.1° 04:45 | 7.1 | 83% | 110.8° |
| 2026-08-24 Mon | 100 | 63 | 63 | 02:00–05:00 (good, 3.0 h) | 79.1° 04:45 | 7.16 | 90% | 99.1° |
| 2026-08-25 Tue | 100 | 98 | 98 | 00:00–05:00 (good, 5.0 h) | 79.1° 04:40 | 7.22 | 95% | 87.3° |
| 2026-08-26 Wed | 74 | 97 | 72 | 01:25–05:05 (good, 3.67 h) | 79.1° 04:35 | 7.27 | 98% | 75.4° |
| 2026-08-27 Thu | 58 | 98 | 57 | 04:25–05:05 (good, 0.67 h) | 79.1° 04:30 | 7.33 | 100% | 63.2° |
| 2026-08-28 Fri | 40 | 91 | 36 | 23:00–05:05 (marginal, 6.08 h) | 79.1° 04:25 | 7.39 | 99% | 50.9° |
| 2026-08-29 Sat | 28 | 4 | 1 | — | 79.1° 04:25 | 7.44 | 97% | 38.7° |
| 2026-08-30 Sun | 23 | 99 | 23 | 23:00–05:10 (marginal, 6.17 h) | 79.1° 04:20 | 7.5 | 92% | 27.0° |
| 2026-08-31 Mon | 30 | 99 | 30 | 22:40–05:10 (marginal, 6.5 h) | 79.1° 04:15 | 7.56 | 85% | 17.3° |
| 2026-09-01 Tue | 41 | 88 | 36 | 22:35–04:00 (marginal, 5.42 h) | 79.1° 04:10 | 7.61 | 76% | 15.3° |
| 2026-09-02 Wed | 57 | 8 | 4 | — | 79.1° 04:10 | 7.67 | 66% | 23.2° |
| 2026-09-03 Thu | 75 | 87 | 65 | 00:00–03:00 (good, 3.0 h) | 79.1° 04:05 | 7.72 | 55% | 35.1° |
| 2026-09-04 Fri | 86 | 99 | 85 | 22:45–05:15 (good, 6.5 h) | 79.1° 04:00 | 7.78 | 43% | 48.1° |
| 2026-09-05 Sat | 95 | 100 | 95 | 22:30–05:15 (good, 6.75 h) | 79.1° 03:55 | 7.83 | 32% | 61.6° |
| 2026-09-06 Sun | 100 | 100 | 100 | 22:25–05:20 (good, 6.92 h) | 79.1° 03:50 | 7.89 | 22% | 75.4° |
| 2026-09-07 Mon | 100 | 100 | 100 | 22:20–05:20 (good, 7.0 h) | 79.1° 03:50 | 7.94 | 13% | 89.2° |
| 2026-09-08 Tue | 100 | 100 | 100 | 22:15–05:20 (good, 7.08 h) | 79.1° 03:45 | 8.0 | 6% | 103.0° |
| 2026-09-09 Wed | 100 | 85 | 85 | 22:20–05:00 (good, 6.67 h) | 79.1° 03:40 | 8.05 | 2% | 116.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-08-11&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.