← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-05-10 Wed | 93 | — | unknown | 22:25–02:30 (good, 4.08 h) | 50.1° 22:35 | 5.83 | 33% | 154.0° |
| 2045-05-11 Thu | 93 | — | unknown | 22:25–02:25 (good, 4.0 h) | 50.1° 22:35 | 5.77 | 24% | 165.1° |
| 2045-05-12 Fri | 93 | — | unknown | 22:30–02:20 (good, 3.83 h) | 50.1° 22:30 | 5.72 | 16% | 172.2° |
| 2045-05-13 Sat | 92 | — | unknown | 22:30–02:15 (good, 3.75 h) | 50.1° 22:25 | 5.66 | 10% | 165.2° |
| 2045-05-14 Sun | 90 | — | unknown | 22:30–02:10 (good, 3.67 h) | 50.1° 22:20 | 5.61 | 4% | 153.2° |
| 2045-05-15 Mon | 87 | — | unknown | 22:35–02:10 (good, 3.58 h) | 50.1° 22:15 | 5.56 | 1% | 140.1° |
| 2045-05-16 Tue | 86 | — | unknown | 22:35–02:05 (good, 3.5 h) | 50.1° 22:15 | 5.5 | 0% | 126.5° |
| 2045-05-17 Wed | 84 | — | unknown | 22:35–02:00 (good, 3.42 h) | 50.1° 22:10 | 5.45 | 2% | 112.6° |
| 2045-05-18 Thu | 81 | — | unknown | 22:40–01:55 (good, 3.25 h) | 50.1° 22:05 | 5.4 | 6% | 98.4° |
| 2045-05-19 Fri | 75 | — | unknown | 22:40–01:55 (good, 3.25 h) | 50.1° 22:00 | 5.35 | 13% | 84.2° |
| 2045-05-20 Sat | 68 | — | unknown | 22:40–01:50 (good, 3.17 h) | 50.1° 21:55 | 5.3 | 22% | 69.9° |
| 2045-05-21 Sun | 57 | — | unknown | 22:45–01:45 (good, 3.0 h) | 50.1° 21:55 | 5.25 | 32% | 55.7° |
| 2045-05-22 Mon | 45 | — | unknown | 22:45–01:25 (good, 2.67 h) | 50.1° 21:50 | 5.2 | 43% | 41.7° |
| 2045-05-23 Tue | 32 | — | unknown | 22:45–02:05 (marginal, 3.33 h) | 50.1° 21:45 | 5.16 | 55% | 28.0° |
| 2045-05-24 Wed | 25 | — | unknown | 22:45–01:55 (marginal, 3.17 h) | 50.1° 21:40 | 5.11 | 66% | 15.2° |
| 2045-05-25 Thu | 19 | — | unknown | 22:50–01:45 (marginal, 2.92 h) | 50.1° 21:35 | 5.06 | 76% | 8.0° |
| 2045-05-26 Fri | 15 | — | unknown | 22:50–01:35 (marginal, 2.75 h) | 50.1° 21:35 | 5.02 | 84% | 16.3° |
| 2045-05-27 Sat | 13 | — | unknown | 22:50–01:20 (marginal, 2.5 h) | 50.1° 21:30 | 4.98 | 91% | 28.7° |
| 2045-05-28 Sun | 15 | — | unknown | 22:55–01:20 (marginal, 2.42 h) | 50.1° 21:25 | 4.93 | 96% | 41.5° |
| 2045-05-29 Mon | 20 | — | unknown | 22:55–01:25 (marginal, 2.5 h) | 50.1° 21:20 | 4.89 | 99% | 54.2° |
| 2045-05-30 Tue | 25 | — | unknown | 22:55–23:00 (good, 0.08 h) | 50.1° 21:20 | 4.86 | 100% | 66.8° |
| 2045-05-31 Wed | 32 | — | unknown | 22:55–00:10 (good, 1.25 h) | 50.1° 21:15 | 4.82 | 98% | 79.2° |
| 2045-06-01 Thu | 37 | — | unknown | 23:00–00:40 (good, 1.67 h) | 50.1° 21:10 | 4.78 | 95% | 91.4° |
| 2045-06-02 Fri | 47 | — | unknown | 23:00–00:45 (good, 1.75 h) | 50.1° 21:05 | 4.75 | 90% | 103.4° |
| 2045-06-03 Sat | 48 | — | unknown | 23:00–00:45 (good, 1.75 h) | 50.1° 21:00 | 4.71 | 84% | 115.2° |
| 2045-06-04 Sun | 48 | — | unknown | 23:00–00:45 (good, 1.75 h) | 50.1° 21:00 | 4.68 | 76% | 127.0° |
| 2045-06-05 Mon | 45 | — | unknown | 23:05–00:45 (good, 1.67 h) | 50.1° 20:55 | 4.65 | 68% | 138.6° |
| 2045-06-06 Tue | 44 | — | unknown | 23:05–00:40 (good, 1.58 h) | 50.1° 20:50 | 4.62 | 59% | 150.1° |
| 2045-06-07 Wed | 42 | — | unknown | 23:05–00:40 (good, 1.58 h) | 50.1° 20:45 | 4.6 | 49% | 161.3° |
| 2045-06-08 Thu | 40 | — | unknown | 23:05–00:35 (good, 1.5 h) | 50.1° 20:40 | 4.57 | 40% | 170.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-05-10&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.