← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-03-10 Sun | 4 | — | unknown | 19:55–20:25 (marginal, 0.5 h) | 89.6° 13:50 | 9.21 | 62% | 69.0° |
| 2041-03-11 Mon | 3 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.6° 13:50 | 9.16 | 71% | 78.6° |
| 2041-03-12 Tue | 3 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.7° 13:45 | 9.11 | 80% | 88.3° |
| 2041-03-13 Wed | 3 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.8° 13:40 | 9.06 | 86% | 98.0° |
| 2041-03-14 Thu | 3 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.7° 13:35 | 9.01 | 92% | 107.5° |
| 2041-03-15 Fri | 2 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 89.5° 13:30 | 8.96 | 96% | 116.8° |
| 2041-03-16 Sat | 2 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.6° 13:30 | 8.91 | 99% | 125.7° |
| 2041-03-17 Sun | 1 | — | unknown | — | 89.8° 13:25 | 8.86 | 100% | 133.8° |
| 2041-03-18 Mon | 1 | — | unknown | — | 89.8° 13:20 | 8.81 | 99% | 140.3° |
| 2041-03-19 Tue | 1 | — | unknown | — | 89.7° 13:15 | 8.75 | 96% | 144.4° |
| 2041-03-20 Wed | 1 | — | unknown | — | 89.5° 13:15 | 8.7 | 91% | 144.9° |
| 2041-03-21 Thu | 1 | — | unknown | — | 89.7° 13:10 | 8.65 | 84% | 141.6° |
| 2041-03-22 Fri | 0 | — | unknown | — | 89.8° 13:05 | 8.6 | 76% | 135.1° |
| 2041-03-23 Sat | 0 | — | unknown | — | 89.8° 13:00 | 8.55 | 66% | 126.5° |
| 2041-03-24 Sun | 0 | — | unknown | — | 89.6° 12:55 | 8.49 | 56% | 116.5° |
| 2041-03-25 Mon | 0 | — | unknown | — | 89.6° 12:55 | 8.44 | 44% | 105.6° |
| 2041-03-26 Tue | 0 | — | unknown | — | 89.7° 12:50 | 8.39 | 33% | 94.1° |
| 2041-03-27 Wed | 0 | — | unknown | — | 89.8° 12:45 | 8.33 | 23% | 82.2° |
| 2041-03-28 Thu | 0 | — | unknown | — | 89.7° 12:40 | 8.28 | 14% | 70.4° |
| 2041-03-29 Fri | 0 | — | unknown | — | 89.5° 12:35 | 8.23 | 7% | 58.9° |
| 2041-03-30 Sat | 0 | — | unknown | — | 89.6° 12:35 | 8.17 | 2% | 48.5° |
| 2041-03-31 Sun | 0 | — | unknown | — | 89.8° 13:30 | 8.12 | 0% | 40.2° |
| 2041-04-01 Mon | 0 | — | unknown | — | 89.8° 13:25 | 8.06 | 1% | 35.4° |
| 2041-04-02 Tue | 0 | — | unknown | — | 89.7° 13:20 | 8.01 | 5% | 35.4° |
| 2041-04-03 Wed | 0 | — | unknown | — | 89.5° 13:20 | 7.95 | 10% | 39.9° |
| 2041-04-04 Thu | 0 | — | unknown | — | 89.7° 13:15 | 7.9 | 18% | 47.3° |
| 2041-04-05 Fri | 0 | — | unknown | — | 89.8° 13:10 | 7.84 | 26% | 56.1° |
| 2041-04-06 Sat | 0 | — | unknown | — | 89.8° 13:05 | 7.78 | 36% | 65.6° |
| 2041-04-07 Sun | 0 | — | unknown | — | 89.6° 13:00 | 7.73 | 46% | 75.4° |
| 2041-04-08 Mon | 0 | — | unknown | — | 89.6° 13:00 | 7.67 | 55% | 85.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-03-10&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.