← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-05-10 Fri | 80 | — | unknown | 01:15–04:15 (good, 3.0 h) | 71.1° 06:05 | 5.83 | 75% | 119.8° |
| 2041-05-11 Sat | 71 | — | unknown | 01:15–04:15 (good, 3.0 h) | 71.1° 06:00 | 5.77 | 83% | 112.9° |
| 2041-05-12 Sun | 64 | — | unknown | 01:15–04:10 (good, 2.92 h) | 71.1° 06:00 | 5.72 | 90% | 105.2° |
| 2041-05-13 Mon | 58 | — | unknown | 01:20–04:10 (good, 2.83 h) | 71.1° 05:55 | 5.67 | 95% | 96.9° |
| 2041-05-14 Tue | 51 | — | unknown | 01:50–04:10 (good, 2.33 h) | 71.1° 05:50 | 5.61 | 99% | 88.1° |
| 2041-05-15 Wed | 44 | — | unknown | 02:20–04:05 (good, 1.75 h) | 71.1° 05:45 | 5.56 | 100% | 79.2° |
| 2041-05-16 Thu | 40 | — | unknown | 02:50–04:05 (good, 1.25 h) | 71.1° 05:45 | 5.51 | 99% | 70.5° |
| 2041-05-17 Fri | 38 | — | unknown | 03:10–04:05 (good, 0.92 h) | 71.1° 05:40 | 5.45 | 96% | 62.3° |
| 2041-05-18 Sat | 38 | — | unknown | 03:00–04:00 (good, 1.0 h) | 71.1° 05:35 | 5.4 | 90% | 55.3° |
| 2041-05-19 Sun | 50 | — | unknown | 01:45–04:00 (good, 2.25 h) | 71.1° 05:30 | 5.35 | 82% | 50.1° |
| 2041-05-20 Mon | 66 | — | unknown | 00:25–04:00 (good, 3.58 h) | 71.1° 05:25 | 5.3 | 72% | 47.6° |
| 2041-05-21 Tue | 77 | — | unknown | 00:20–04:00 (good, 3.67 h) | 71.1° 05:25 | 5.25 | 62% | 48.1° |
| 2041-05-22 Wed | 87 | — | unknown | 00:20–03:55 (good, 3.58 h) | 71.1° 05:20 | 5.2 | 50% | 51.8° |
| 2041-05-23 Thu | 95 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:15 | 5.16 | 39% | 57.8° |
| 2041-05-24 Fri | 100 | — | unknown | 00:10–03:55 (good, 3.75 h) | 71.1° 05:10 | 5.11 | 28% | 65.5° |
| 2041-05-25 Sat | 100 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 05:05 | 5.07 | 18% | 74.1° |
| 2041-05-26 Sun | 100 | — | unknown | 00:00–03:50 (good, 3.83 h) | 71.1° 05:05 | 5.02 | 10% | 83.3° |
| 2041-05-27 Mon | 100 | — | unknown | 00:00–03:50 (good, 3.83 h) | 71.1° 05:00 | 4.98 | 5% | 92.5° |
| 2041-05-28 Tue | 100 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 04:55 | 4.94 | 1% | 101.6° |
| 2041-05-29 Wed | 100 | — | unknown | 23:50–03:50 (good, 4.0 h) | 71.1° 04:50 | 4.9 | 0% | 110.1° |
| 2041-05-30 Thu | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:50 | 4.86 | 1% | 117.8° |
| 2041-05-31 Fri | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.82 | 4% | 124.3° |
| 2041-06-01 Sat | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 71.1° 04:40 | 4.78 | 9% | 129.1° |
| 2041-06-02 Sun | 100 | — | unknown | 23:35–03:45 (good, 4.17 h) | 71.1° 04:35 | 4.75 | 16% | 132.0° |
| 2041-06-03 Mon | 100 | — | unknown | 23:35–03:45 (good, 4.17 h) | 71.1° 04:30 | 4.71 | 23% | 132.6° |
| 2041-06-04 Tue | 100 | — | unknown | 23:30–03:40 (good, 4.17 h) | 71.1° 04:30 | 4.68 | 32% | 130.9° |
| 2041-06-05 Wed | 100 | — | unknown | 23:25–03:40 (good, 4.25 h) | 71.1° 04:25 | 4.65 | 41% | 127.2° |
| 2041-06-06 Thu | 100 | — | unknown | 23:25–03:40 (good, 4.25 h) | 71.1° 04:20 | 4.62 | 50% | 122.0° |
| 2041-06-07 Fri | 100 | — | unknown | 23:25–03:40 (good, 4.25 h) | 71.1° 04:15 | 4.6 | 60% | 115.5° |
| 2041-06-08 Sat | 100 | — | unknown | 23:25–03:40 (good, 4.25 h) | 71.1° 04:10 | 4.57 | 69% | 108.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-05-10&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.