← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-08-12 Wed | 100 | 97 | 97 | 22:15–04:45 (good, 6.5 h) | 71.1° 00:00 | 6.47 | 0% | 135.3° |
| 2026-08-13 Thu | 100 | 33 | 33 | 22:15–01:00 (good, 2.75 h) | 71.1° 23:55 | 6.53 | 2% | 131.3° |
| 2026-08-14 Fri | 100 | 69 | 69 | 22:10–02:00 (good, 3.83 h) | 71.1° 23:50 | 6.58 | 6% | 124.8° |
| 2026-08-15 Sat | 100 | 99 | 99 | 22:10–04:45 (good, 6.58 h) | 71.1° 23:45 | 6.64 | 12% | 116.9° |
| 2026-08-16 Sun | 100 | 100 | 100 | 22:05–04:50 (good, 6.75 h) | 71.1° 23:40 | 6.7 | 20% | 108.2° |
| 2026-08-17 Mon | 100 | 100 | 100 | 22:05–04:45 (good, 6.67 h) | 71.1° 23:40 | 6.76 | 29% | 99.3° |
| 2026-08-18 Tue | 100 | 66 | 66 | 22:05–02:00 (good, 3.92 h) | 71.1° 23:35 | 6.81 | 39% | 90.4° |
| 2026-08-19 Wed | 100 | 100 | 100 | 22:00–04:35 (good, 6.58 h) | 71.1° 23:30 | 6.87 | 48% | 81.7° |
| 2026-08-20 Thu | 100 | 99 | 99 | 22:00–04:30 (good, 6.5 h) | 71.1° 23:25 | 6.93 | 58% | 73.3° |
| 2026-08-21 Fri | 100 | 100 | 100 | 21:55–04:30 (good, 6.58 h) | 71.1° 23:20 | 6.99 | 67% | 65.4° |
| 2026-08-22 Sat | 99 | 90 | 89 | 01:00–04:25 (good, 3.42 h) | 71.1° 23:20 | 7.04 | 76% | 58.1° |
| 2026-08-23 Sun | 91 | 87 | 79 | 01:00–04:05 (good, 3.08 h) | 71.1° 23:15 | 7.1 | 83% | 51.8° |
| 2026-08-24 Mon | 83 | 47 | 39 | 03:25–04:15 (good, 0.83 h) | 71.1° 23:10 | 7.16 | 90% | 47.0° |
| 2026-08-25 Tue | 51 | 97 | 50 | 21:50–04:40 (marginal, 6.83 h) | 71.1° 23:05 | 7.22 | 95% | 44.3° |
| 2026-08-26 Wed | 45 | 93 | 42 | 21:45–04:20 (marginal, 6.58 h) | 71.1° 23:05 | 7.27 | 98% | 44.2° |
| 2026-08-27 Thu | 44 | 97 | 43 | 21:45–04:05 (marginal, 6.33 h) | 71.1° 23:00 | 7.33 | 100% | 46.8° |
| 2026-08-28 Fri | 48 | 94 | 45 | 21:45–03:55 (marginal, 6.17 h) | 71.1° 22:55 | 7.39 | 99% | 51.9° |
| 2026-08-29 Sat | 58 | 24 | 14 | 21:40–23:00 (marginal, 1.33 h) | 71.1° 22:50 | 7.44 | 97% | 59.0° |
| 2026-08-30 Sun | 71 | 97 | 69 | 21:40–00:25 (good, 2.75 h) | 71.1° 22:45 | 7.5 | 92% | 67.3° |
| 2026-08-31 Mon | 79 | 99 | 78 | 21:35–01:40 (good, 4.08 h) | 71.1° 22:45 | 7.56 | 85% | 76.6° |
| 2026-09-01 Tue | 100 | 91 | 91 | 21:35–02:45 (good, 5.17 h) | 71.1° 22:40 | 7.61 | 76% | 86.3° |
| 2026-09-02 Wed | 100 | 9 | 9 | — | 71.1° 22:35 | 7.67 | 66% | 96.3° |
| 2026-09-03 Thu | 100 | 89 | 89 | 21:30–03:10 (good, 5.67 h) | 71.1° 22:30 | 7.72 | 55% | 106.2° |
| 2026-09-04 Fri | 100 | 96 | 96 | 21:30–03:30 (good, 6.0 h) | 71.1° 22:25 | 7.78 | 43% | 115.6° |
| 2026-09-05 Sat | 100 | 100 | 100 | 21:25–03:25 (good, 6.0 h) | 71.1° 22:25 | 7.83 | 32% | 124.1° |
| 2026-09-06 Sun | 100 | 99 | 99 | 21:25–03:25 (good, 6.0 h) | 71.1° 22:20 | 7.89 | 22% | 131.0° |
| 2026-09-07 Mon | 100 | 100 | 100 | 21:25–03:20 (good, 5.92 h) | 71.1° 22:15 | 7.94 | 13% | 135.2° |
| 2026-09-08 Tue | 100 | 100 | 100 | 21:20–03:20 (good, 6.0 h) | 71.1° 22:10 | 8.0 | 6% | 136.0° |
| 2026-09-09 Wed | 100 | 91 | 91 | 21:20–03:00 (good, 5.67 h) | 71.1° 22:10 | 8.05 | 2% | 133.2° |
| 2026-09-10 Thu | 100 | 99 | 99 | 21:15–03:10 (good, 5.92 h) | 71.1° 22:05 | 8.11 | 0% | 127.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-08-12&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.