← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-05-09 Mon | 17 | — | unknown | 22:25–02:25 (marginal, 4.0 h) | 50.1° 22:40 | 5.87 | 96% | 21.9° |
| 2044-05-10 Tue | 20 | — | unknown | 22:25–02:20 (marginal, 3.92 h) | 50.1° 22:35 | 5.81 | 99% | 33.9° |
| 2044-05-11 Wed | 28 | — | unknown | 22:25–02:25 (marginal, 4.0 h) | 50.1° 22:30 | 5.76 | 100% | 46.0° |
| 2044-05-12 Thu | 38 | — | unknown | 22:30–23:00 (good, 0.5 h) | 50.1° 22:30 | 5.7 | 99% | 57.9° |
| 2044-05-13 Fri | 68 | — | unknown | 22:30–00:40 (good, 2.17 h) | 50.1° 22:25 | 5.65 | 96% | 69.8° |
| 2044-05-14 Sat | 77 | — | unknown | 22:30–01:40 (good, 3.17 h) | 50.1° 22:20 | 5.6 | 92% | 81.6° |
| 2044-05-15 Sun | 80 | — | unknown | 22:35–01:50 (good, 3.25 h) | 50.1° 22:15 | 5.54 | 86% | 93.4° |
| 2044-05-16 Mon | 82 | — | unknown | 22:35–01:50 (good, 3.25 h) | 50.1° 22:10 | 5.49 | 79% | 105.1° |
| 2044-05-17 Tue | 83 | — | unknown | 22:35–01:55 (good, 3.33 h) | 50.1° 22:10 | 5.44 | 71% | 116.9° |
| 2044-05-18 Wed | 81 | — | unknown | 22:40–01:55 (good, 3.25 h) | 50.1° 22:05 | 5.39 | 62% | 128.8° |
| 2044-05-19 Thu | 79 | — | unknown | 22:40–01:50 (good, 3.17 h) | 50.1° 22:00 | 5.34 | 52% | 140.9° |
| 2044-05-20 Fri | 77 | — | unknown | 22:40–01:50 (good, 3.17 h) | 50.1° 21:55 | 5.29 | 42% | 153.2° |
| 2044-05-21 Sat | 74 | — | unknown | 22:45–01:45 (good, 3.0 h) | 50.1° 21:50 | 5.24 | 32% | 165.3° |
| 2044-05-22 Sun | 73 | — | unknown | 22:45–01:40 (good, 2.92 h) | 50.1° 21:50 | 5.19 | 23% | 173.6° |
| 2044-05-23 Mon | 71 | — | unknown | 22:45–01:35 (good, 2.83 h) | 50.1° 21:45 | 5.14 | 14% | 164.7° |
| 2044-05-24 Tue | 69 | — | unknown | 22:45–01:30 (good, 2.75 h) | 50.1° 21:40 | 5.1 | 7% | 151.2° |
| 2044-05-25 Wed | 66 | — | unknown | 22:50–01:30 (good, 2.67 h) | 50.1° 21:35 | 5.05 | 2% | 136.8° |
| 2044-05-26 Thu | 64 | — | unknown | 22:50–01:25 (good, 2.58 h) | 50.1° 21:35 | 5.01 | 0% | 122.0° |
| 2044-05-27 Fri | 63 | — | unknown | 22:50–01:20 (good, 2.5 h) | 50.1° 21:30 | 4.97 | 1% | 107.0° |
| 2044-05-28 Sat | 60 | — | unknown | 22:55–01:15 (good, 2.33 h) | 50.1° 21:25 | 4.92 | 5% | 92.0° |
| 2044-05-29 Sun | 56 | — | unknown | 22:55–01:10 (good, 2.25 h) | 50.1° 21:20 | 4.88 | 11% | 77.1° |
| 2044-05-30 Mon | 50 | — | unknown | 22:55–01:10 (good, 2.25 h) | 50.1° 21:15 | 4.85 | 20% | 62.5° |
| 2044-05-31 Tue | 42 | — | unknown | 22:55–00:55 (good, 2.0 h) | 50.1° 21:15 | 4.81 | 30% | 48.3° |
| 2044-06-01 Wed | 32 | — | unknown | 23:00–00:40 (good, 1.67 h) | 50.1° 21:10 | 4.77 | 41% | 34.5° |
| 2044-06-02 Thu | 25 | — | unknown | 23:00–23:35 (good, 0.58 h) | 50.1° 21:05 | 4.74 | 52% | 21.4° |
| 2044-06-03 Fri | 19 | — | unknown | 23:00–01:15 (marginal, 2.25 h) | 50.1° 21:00 | 4.7 | 62% | 9.8° |
| 2044-06-04 Sat | 15 | — | unknown | 23:00–01:05 (marginal, 2.08 h) | 50.1° 20:55 | 4.67 | 72% | 8.5° |
| 2044-06-05 Sun | 12 | — | unknown | 23:05–00:55 (marginal, 1.83 h) | 50.1° 20:55 | 4.64 | 80% | 19.2° |
| 2044-06-06 Mon | 10 | — | unknown | 23:05–00:45 (marginal, 1.67 h) | 50.1° 20:50 | 4.62 | 88% | 31.0° |
| 2044-06-07 Tue | 11 | — | unknown | 23:05–00:45 (marginal, 1.67 h) | 50.1° 20:45 | 4.59 | 93% | 43.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-05-09&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.