← 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. |
|---|---|---|---|---|---|---|---|---|
| 2029-08-19 Sun | 1 | — | unknown | — | 42.9° 09:00 | 6.89 | 82% | 148.5° |
| 2029-08-20 Mon | 1 | — | unknown | — | 42.9° 09:00 | 6.95 | 90% | 142.1° |
| 2029-08-21 Tue | 1 | — | unknown | — | 42.9° 08:55 | 7.0 | 95% | 133.3° |
| 2029-08-22 Wed | 1 | — | unknown | — | 42.9° 08:50 | 7.06 | 98% | 123.2° |
| 2029-08-23 Thu | 1 | — | unknown | — | 42.9° 08:45 | 7.12 | 100% | 112.7° |
| 2029-08-24 Fri | 1 | — | unknown | — | 42.9° 08:45 | 7.17 | 99% | 102.0° |
| 2029-08-25 Sat | 2 | — | unknown | 04:55–05:05 (marginal, 0.17 h) | 42.9° 08:40 | 7.23 | 96% | 91.3° |
| 2029-08-26 Sun | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 42.9° 08:35 | 7.29 | 92% | 80.8° |
| 2029-08-27 Mon | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 42.9° 08:30 | 7.35 | 86% | 70.5° |
| 2029-08-28 Tue | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 42.9° 08:25 | 7.4 | 79% | 60.5° |
| 2029-08-29 Wed | 2 | — | unknown | 05:00–05:10 (marginal, 0.17 h) | 42.9° 08:25 | 7.46 | 71% | 51.0° |
| 2029-08-30 Thu | 3 | — | unknown | 04:50–05:10 (marginal, 0.33 h) | 42.9° 08:20 | 7.51 | 62% | 42.3° |
| 2029-08-31 Fri | 4 | — | unknown | 04:40–05:10 (marginal, 0.5 h) | 42.9° 08:15 | 7.57 | 52% | 35.0° |
| 2029-09-01 Sat | 6 | — | unknown | 04:30–05:10 (marginal, 0.67 h) | 42.9° 08:10 | 7.63 | 43% | 30.3° |
| 2029-09-02 Sun | 9 | — | unknown | 04:20–05:15 (marginal, 0.92 h) | 42.9° 08:05 | 7.68 | 33% | 29.7° |
| 2029-09-03 Mon | 12 | — | unknown | 05:05–05:15 (good, 0.17 h) | 42.9° 08:05 | 7.74 | 24% | 33.8° |
| 2029-09-04 Tue | 15 | — | unknown | 04:55–05:15 (good, 0.33 h) | 42.9° 08:00 | 7.79 | 16% | 41.4° |
| 2029-09-05 Wed | 19 | — | unknown | 04:45–05:20 (good, 0.58 h) | 42.9° 07:55 | 7.85 | 8% | 51.4° |
| 2029-09-06 Thu | 22 | — | unknown | 04:35–05:20 (good, 0.75 h) | 42.9° 07:50 | 7.9 | 3% | 62.8° |
| 2029-09-07 Fri | 23 | — | unknown | 04:35–05:20 (good, 0.75 h) | 42.9° 07:50 | 7.96 | 0% | 75.0° |
| 2029-09-08 Sat | 24 | — | unknown | 04:30–05:20 (good, 0.83 h) | 42.9° 07:45 | 8.01 | 0% | 87.8° |
| 2029-09-09 Sun | 26 | — | unknown | 04:25–05:25 (good, 1.0 h) | 42.9° 07:40 | 8.07 | 3% | 100.8° |
| 2029-09-10 Mon | 28 | — | unknown | 04:20–05:25 (good, 1.08 h) | 42.9° 07:35 | 8.12 | 9% | 113.6° |
| 2029-09-11 Tue | 30 | — | unknown | 04:20–05:25 (good, 1.08 h) | 42.9° 07:30 | 8.17 | 17% | 125.8° |
| 2029-09-12 Wed | 31 | — | unknown | 04:15–05:25 (good, 1.17 h) | 42.9° 07:30 | 8.23 | 27% | 136.8° |
| 2029-09-13 Thu | 33 | — | unknown | 04:10–05:30 (good, 1.33 h) | 42.9° 07:25 | 8.28 | 37% | 145.5° |
| 2029-09-14 Fri | 35 | — | unknown | 04:05–05:30 (good, 1.42 h) | 42.9° 07:20 | 8.33 | 48% | 150.3° |
| 2029-09-15 Sat | 36 | — | unknown | 04:00–05:30 (good, 1.5 h) | 42.9° 07:15 | 8.39 | 60% | 149.6° |
| 2029-09-16 Sun | 38 | — | unknown | 04:00–05:30 (good, 1.5 h) | 42.9° 07:10 | 8.44 | 70% | 144.1° |
| 2029-09-17 Mon | 40 | — | unknown | 03:55–05:35 (good, 1.67 h) | 42.9° 07:10 | 8.49 | 79% | 135.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2029-08-19&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.