← 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) | 87.3° 00:55 | 6.47 | 0% | 120.4° |
| 2026-08-13 Thu | 100 | 31 | 31 | 22:15–01:00 (good, 2.75 h) | 87.3° 00:50 | 6.53 | 2% | 123.2° |
| 2026-08-14 Fri | 100 | 68 | 68 | 22:10–02:00 (good, 3.83 h) | 87.3° 00:50 | 6.58 | 6% | 123.7° |
| 2026-08-15 Sat | 100 | 99 | 99 | 22:10–04:45 (good, 6.58 h) | 87.3° 00:45 | 6.64 | 12% | 122.1° |
| 2026-08-16 Sun | 100 | 100 | 100 | 22:05–04:50 (good, 6.75 h) | 87.3° 00:40 | 6.7 | 20% | 118.7° |
| 2026-08-17 Mon | 100 | 100 | 100 | 22:05–04:50 (good, 6.75 h) | 87.3° 00:35 | 6.76 | 29% | 114.0° |
| 2026-08-18 Tue | 100 | 62 | 62 | 22:05–02:00 (good, 3.92 h) | 87.3° 00:30 | 6.81 | 39% | 108.4° |
| 2026-08-19 Wed | 100 | 100 | 100 | 22:00–04:55 (good, 6.92 h) | 87.3° 00:30 | 6.87 | 48% | 102.2° |
| 2026-08-20 Thu | 100 | 99 | 99 | 22:00–04:55 (good, 6.92 h) | 87.3° 00:25 | 6.93 | 58% | 95.8° |
| 2026-08-21 Fri | 100 | 100 | 100 | 21:55–04:55 (good, 7.0 h) | 87.3° 00:20 | 6.99 | 67% | 89.2° |
| 2026-08-22 Sat | 100 | 91 | 91 | 01:00–05:00 (good, 4.0 h) | 87.3° 00:15 | 7.04 | 76% | 82.6° |
| 2026-08-23 Sun | 100 | 85 | 85 | 23:00–05:00 (good, 6.0 h) | 87.3° 00:10 | 7.1 | 83% | 76.3° |
| 2026-08-24 Mon | 96 | 54 | 52 | 02:00–05:00 (good, 3.0 h) | 87.3° 00:10 | 7.16 | 90% | 70.3° |
| 2026-08-25 Tue | 88 | 97 | 85 | 23:00–05:00 (good, 6.0 h) | 87.3° 00:05 | 7.22 | 95% | 65.0° |
| 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° |
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.