← 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 | 57 | — | unknown | 02:30–04:55 (good, 2.42 h) | 87.2° 08:30 | 7.11 | 95% | 123.3° |
| 2046-04-19 Thu | 55 | — | unknown | 02:25–04:55 (good, 2.5 h) | 87.1° 08:30 | 7.05 | 99% | 119.0° |
| 2046-04-20 Fri | 51 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:25 | 6.99 | 100% | 112.9° |
| 2046-04-21 Sat | 49 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:20 | 6.94 | 98% | 105.6° |
| 2046-04-22 Sun | 46 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:15 | 6.88 | 94% | 97.8° |
| 2046-04-23 Mon | 44 | — | unknown | 02:25–04:45 (good, 2.33 h) | 87.2° 08:10 | 6.82 | 87% | 89.8° |
| 2046-04-24 Tue | 45 | — | unknown | 02:15–04:45 (good, 2.5 h) | 87.2° 08:10 | 6.76 | 79% | 82.1° |
| 2046-04-25 Wed | 46 | — | unknown | 02:10–04:40 (good, 2.5 h) | 87.2° 08:05 | 6.7 | 70% | 75.0° |
| 2046-04-26 Thu | 55 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.64 | 60% | 68.6° |
| 2046-04-27 Fri | 61 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.2° 07:55 | 6.59 | 50% | 63.1° |
| 2046-04-28 Sat | 66 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.53 | 41% | 58.9° |
| 2046-04-29 Sun | 70 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.47 | 32% | 56.0° |
| 2046-04-30 Mon | 75 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.41 | 23% | 54.8° |
| 2046-05-01 Tue | 79 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.35 | 16% | 55.2° |
| 2046-05-02 Wed | 82 | — | unknown | 01:20–04:30 (good, 3.17 h) | 87.2° 07:35 | 6.3 | 10% | 57.4° |
| 2046-05-03 Thu | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.1° 07:35 | 6.24 | 5% | 61.1° |
| 2046-05-04 Fri | 84 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.2° 07:30 | 6.18 | 2% | 66.0° |
| 2046-05-05 Sat | 86 | — | unknown | 01:10–04:25 (good, 3.25 h) | 87.2° 07:25 | 6.12 | 0% | 72.0° |
| 2046-05-06 Sun | 86 | — | unknown | 01:05–04:20 (good, 3.25 h) | 87.2° 07:20 | 6.07 | 1% | 78.8° |
| 2046-05-07 Mon | 88 | — | unknown | 01:00–04:20 (good, 3.33 h) | 87.2° 07:15 | 6.01 | 4% | 86.0° |
| 2046-05-08 Tue | 89 | — | unknown | 01:00–04:20 (good, 3.33 h) | 87.2° 07:15 | 5.95 | 8% | 93.5° |
| 2046-05-09 Wed | 90 | — | unknown | 00:55–04:15 (good, 3.33 h) | 87.2° 07:10 | 5.9 | 15% | 101.1° |
| 2046-05-10 Thu | 91 | — | unknown | 00:55–04:15 (good, 3.33 h) | 87.2° 07:05 | 5.84 | 24% | 108.3° |
| 2046-05-11 Fri | 92 | — | unknown | 00:50–04:15 (good, 3.42 h) | 87.2° 07:00 | 5.79 | 33% | 114.8° |
| 2046-05-12 Sat | 92 | — | unknown | 00:45–04:10 (good, 3.42 h) | 87.2° 06:55 | 5.73 | 44% | 120.2° |
| 2046-05-13 Sun | 93 | — | unknown | 00:45–04:10 (good, 3.42 h) | 87.2° 06:55 | 5.68 | 56% | 123.9° |
| 2046-05-14 Mon | 93 | — | unknown | 00:40–04:10 (good, 3.5 h) | 87.2° 06:50 | 5.62 | 67% | 125.4° |
| 2046-05-15 Tue | 91 | — | unknown | 00:40–04:05 (good, 3.42 h) | 87.2° 06:45 | 5.57 | 77% | 124.4° |
| 2046-05-16 Wed | 92 | — | unknown | 00:40–04:05 (good, 3.42 h) | 87.2° 06:40 | 5.52 | 86% | 120.9° |
| 2046-05-17 Thu | 82 | — | unknown | 00:40–04:05 (good, 3.42 h) | 87.1° 06:35 | 5.46 | 93% | 115.5° |
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.