← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-04-18 Wed | 0 | — | unknown | — | 89.8° 12:20 | 7.11 | 95% | 142.9° |
| 2046-04-19 Thu | 0 | — | unknown | — | 89.8° 12:15 | 7.05 | 99% | 150.0° |
| 2046-04-20 Fri | 0 | — | unknown | — | 89.6° 12:10 | 6.99 | 100% | 151.2° |
| 2046-04-21 Sat | 0 | — | unknown | — | 89.6° 12:10 | 6.94 | 98% | 146.0° |
| 2046-04-22 Sun | 0 | — | unknown | — | 89.8° 12:00 | 6.88 | 94% | 137.0° |
| 2046-04-23 Mon | 0 | — | unknown | — | 89.8° 12:00 | 6.82 | 87% | 126.4° |
| 2046-04-24 Tue | 0 | — | unknown | — | 89.6° 11:50 | 6.76 | 79% | 115.2° |
| 2046-04-25 Wed | 0 | — | unknown | — | 89.6° 11:50 | 6.7 | 70% | 104.1° |
| 2046-04-26 Thu | 0 | — | unknown | — | 89.8° 11:45 | 6.64 | 60% | 93.0° |
| 2046-04-27 Fri | 0 | — | unknown | — | 89.8° 11:40 | 6.59 | 50% | 82.3° |
| 2046-04-28 Sat | 1 | — | unknown | — | 89.7° 11:35 | 6.53 | 41% | 71.8° |
| 2046-04-29 Sun | 1 | — | unknown | — | 89.5° 11:30 | 6.47 | 32% | 61.6° |
| 2046-04-30 Mon | 1 | — | unknown | — | 89.7° 11:30 | 6.41 | 23% | 51.9° |
| 2046-05-01 Tue | 1 | — | unknown | — | 89.8° 11:25 | 6.35 | 16% | 42.9° |
| 2046-05-02 Wed | 1 | — | unknown | — | 89.8° 11:20 | 6.3 | 10% | 35.2° |
| 2046-05-03 Thu | 1 | — | unknown | — | 89.6° 11:15 | 6.24 | 5% | 29.9° |
| 2046-05-04 Fri | 1 | — | unknown | — | 89.6° 11:15 | 6.18 | 2% | 28.5° |
| 2046-05-05 Sat | 2 | — | unknown | — | 89.7° 11:10 | 6.12 | 0% | 31.8° |
| 2046-05-06 Sun | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.8° 11:05 | 6.07 | 1% | 38.8° |
| 2046-05-07 Mon | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.7° 11:00 | 6.01 | 4% | 47.9° |
| 2046-05-08 Tue | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.6° 10:55 | 5.95 | 8% | 58.3° |
| 2046-05-09 Wed | 2 | — | unknown | 04:50–05:00 (marginal, 0.17 h) | 89.6° 10:55 | 5.9 | 15% | 69.5° |
| 2046-05-10 Thu | 3 | — | unknown | 04:45–05:00 (marginal, 0.25 h) | 89.8° 10:50 | 5.84 | 24% | 81.2° |
| 2046-05-11 Fri | 3 | — | unknown | 04:40–04:55 (marginal, 0.25 h) | 89.8° 10:45 | 5.79 | 33% | 93.2° |
| 2046-05-12 Sat | 3 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.7° 10:40 | 5.73 | 44% | 105.3° |
| 2046-05-13 Sun | 4 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.5° 10:35 | 5.68 | 56% | 117.4° |
| 2046-05-14 Mon | 5 | — | unknown | 04:30–04:55 (marginal, 0.42 h) | 89.7° 10:35 | 5.62 | 67% | 129.1° |
| 2046-05-15 Tue | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.8° 10:30 | 5.57 | 77% | 139.8° |
| 2046-05-16 Wed | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.8° 10:25 | 5.52 | 86% | 148.1° |
| 2046-05-17 Thu | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.6° 10:20 | 5.46 | 93% | 151.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-04-18&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.