← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-04-27 Fri | 53 | — | unknown | 01:55–04:40 (good, 2.75 h) | 71.1° 07:00 | 6.59 | 50% | 42.4° |
| 2046-04-28 Sat | 59 | — | unknown | 01:55–04:35 (good, 2.67 h) | 71.1° 06:55 | 6.53 | 41% | 42.4° |
| 2046-04-29 Sun | 64 | — | unknown | 01:50–04:35 (good, 2.75 h) | 71.1° 06:50 | 6.47 | 32% | 45.0° |
| 2046-04-30 Mon | 69 | — | unknown | 01:45–04:35 (good, 2.83 h) | 71.1° 06:45 | 6.41 | 23% | 49.8° |
| 2046-05-01 Tue | 73 | — | unknown | 01:40–04:30 (good, 2.83 h) | 71.1° 06:45 | 6.35 | 16% | 56.2° |
| 2046-05-02 Wed | 76 | — | unknown | 01:40–04:30 (good, 2.83 h) | 71.1° 06:40 | 6.3 | 10% | 63.7° |
| 2046-05-03 Thu | 77 | — | unknown | 01:35–04:25 (good, 2.83 h) | 71.1° 06:35 | 6.24 | 5% | 72.0° |
| 2046-05-04 Fri | 78 | — | unknown | 01:30–04:25 (good, 2.92 h) | 71.1° 06:30 | 6.18 | 2% | 80.9° |
| 2046-05-05 Sat | 79 | — | unknown | 01:25–04:25 (good, 3.0 h) | 71.1° 06:25 | 6.12 | 0% | 90.0° |
| 2046-05-06 Sun | 80 | — | unknown | 01:20–04:20 (good, 3.0 h) | 71.1° 06:25 | 6.07 | 1% | 99.4° |
| 2046-05-07 Mon | 81 | — | unknown | 01:20–04:20 (good, 3.0 h) | 71.1° 06:20 | 6.01 | 4% | 108.6° |
| 2046-05-08 Tue | 83 | — | unknown | 01:15–04:20 (good, 3.08 h) | 71.1° 06:15 | 5.95 | 8% | 117.6° |
| 2046-05-09 Wed | 83 | — | unknown | 01:10–04:15 (good, 3.08 h) | 71.1° 06:10 | 5.9 | 15% | 125.7° |
| 2046-05-10 Thu | 85 | — | unknown | 01:05–04:15 (good, 3.17 h) | 71.1° 06:05 | 5.84 | 24% | 132.5° |
| 2046-05-11 Fri | 86 | — | unknown | 01:05–04:15 (good, 3.17 h) | 71.1° 06:05 | 5.79 | 33% | 136.9° |
| 2046-05-12 Sat | 86 | — | unknown | 01:00–04:10 (good, 3.17 h) | 71.1° 06:00 | 5.73 | 44% | 138.1° |
| 2046-05-13 Sun | 87 | — | unknown | 01:00–04:10 (good, 3.17 h) | 71.1° 05:55 | 5.68 | 56% | 135.5° |
| 2046-05-14 Mon | 87 | — | unknown | 00:55–04:10 (good, 3.25 h) | 71.1° 05:50 | 5.62 | 67% | 129.8° |
| 2046-05-15 Tue | 85 | — | unknown | 00:55–04:05 (good, 3.17 h) | 71.1° 05:50 | 5.57 | 77% | 121.6° |
| 2046-05-16 Wed | 83 | — | unknown | 00:55–04:05 (good, 3.17 h) | 71.1° 05:45 | 5.52 | 86% | 112.0° |
| 2046-05-17 Thu | 68 | — | unknown | 01:00–04:05 (good, 3.08 h) | 71.1° 05:40 | 5.46 | 93% | 101.6° |
| 2046-05-18 Fri | 58 | — | unknown | 01:10–04:00 (good, 2.83 h) | 71.1° 05:35 | 5.41 | 98% | 90.9° |
| 2046-05-19 Sat | 49 | — | unknown | 01:50–04:00 (good, 2.17 h) | 71.1° 05:30 | 5.36 | 100% | 80.3° |
| 2046-05-20 Sun | 43 | — | unknown | 02:30–04:00 (good, 1.5 h) | 71.1° 05:30 | 5.31 | 99% | 70.2° |
| 2046-05-21 Mon | 39 | — | unknown | 03:00–04:00 (good, 1.0 h) | 71.1° 05:25 | 5.26 | 96% | 60.9° |
| 2046-05-22 Tue | 38 | — | unknown | 03:25–03:55 (good, 0.5 h) | 71.1° 05:20 | 5.21 | 91% | 52.8° |
| 2046-05-23 Wed | 41 | — | unknown | 03:00–03:55 (good, 0.92 h) | 71.1° 05:15 | 5.17 | 84% | 46.6° |
| 2046-05-24 Thu | 60 | — | unknown | 00:10–03:55 (good, 3.75 h) | 71.1° 05:10 | 5.12 | 76% | 42.8° |
| 2046-05-25 Fri | 69 | — | unknown | 00:05–03:55 (good, 3.83 h) | 71.1° 05:10 | 5.07 | 67% | 41.8° |
| 2046-05-26 Sat | 78 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 05:05 | 5.03 | 57% | 43.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-04-27&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.