← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-05-05 Thu | 0 | — | unknown | — | 79.2° 12:00 | 6.1 | 66% | 119.2° |
| 2044-05-06 Fri | 0 | — | unknown | — | 79.2° 11:55 | 6.04 | 76% | 131.6° |
| 2044-05-07 Sat | 0 | — | unknown | — | 79.2° 11:50 | 5.98 | 84% | 143.5° |
| 2044-05-08 Sun | 0 | — | unknown | — | 79.2° 11:45 | 5.93 | 91% | 154.3° |
| 2044-05-09 Mon | 0 | — | unknown | — | 79.2° 11:40 | 5.87 | 96% | 162.4° |
| 2044-05-10 Tue | 0 | — | unknown | — | 79.2° 11:40 | 5.81 | 99% | 163.6° |
| 2044-05-11 Wed | 0 | — | unknown | — | 79.2° 11:35 | 5.76 | 100% | 157.2° |
| 2044-05-12 Thu | 0 | — | unknown | — | 79.2° 11:30 | 5.7 | 99% | 147.5° |
| 2044-05-13 Fri | 0 | — | unknown | — | 79.2° 11:25 | 5.65 | 96% | 136.8° |
| 2044-05-14 Sat | 0 | — | unknown | — | 79.2° 11:25 | 5.6 | 92% | 125.8° |
| 2044-05-15 Sun | 0 | — | unknown | — | 79.2° 11:20 | 5.54 | 86% | 114.5° |
| 2044-05-16 Mon | 0 | — | unknown | — | 79.2° 11:15 | 5.49 | 79% | 103.2° |
| 2044-05-17 Tue | 0 | — | unknown | — | 79.2° 11:10 | 5.44 | 71% | 91.8° |
| 2044-05-18 Wed | 0 | — | unknown | — | 79.2° 11:05 | 5.39 | 62% | 80.2° |
| 2044-05-19 Thu | 0 | — | unknown | — | 79.2° 11:05 | 5.34 | 52% | 68.5° |
| 2044-05-20 Fri | 0 | — | unknown | — | 79.2° 11:00 | 5.29 | 42% | 56.5° |
| 2044-05-21 Sat | 0 | — | unknown | — | 79.2° 10:55 | 5.24 | 32% | 44.5° |
| 2044-05-22 Sun | 0 | — | unknown | — | 79.2° 10:50 | 5.19 | 23% | 32.5° |
| 2044-05-23 Mon | 0 | — | unknown | — | 79.2° 10:45 | 5.14 | 14% | 21.6° |
| 2044-05-24 Tue | 0 | — | unknown | — | 79.2° 10:45 | 5.1 | 7% | 15.7° |
| 2044-05-25 Wed | 0 | — | unknown | — | 79.2° 10:40 | 5.05 | 2% | 20.8° |
| 2044-05-26 Thu | 0 | — | unknown | — | 79.2° 10:35 | 5.01 | 0% | 32.5° |
| 2044-05-27 Fri | 0 | — | unknown | — | 79.2° 10:30 | 4.97 | 1% | 46.2° |
| 2044-05-28 Sat | 1 | — | unknown | — | 79.2° 10:30 | 4.92 | 5% | 60.4° |
| 2044-05-29 Sun | 1 | — | unknown | — | 79.2° 10:25 | 4.88 | 11% | 74.7° |
| 2044-05-30 Mon | 1 | — | unknown | — | 79.2° 10:20 | 4.85 | 20% | 88.9° |
| 2044-05-31 Tue | 1 | — | unknown | — | 79.2° 10:15 | 4.81 | 30% | 102.7° |
| 2044-06-01 Wed | 1 | — | unknown | — | 79.2° 10:10 | 4.77 | 41% | 116.0° |
| 2044-06-02 Thu | 1 | — | unknown | — | 79.2° 10:10 | 4.74 | 52% | 128.8° |
| 2044-06-03 Fri | 1 | — | unknown | — | 79.2° 10:05 | 4.7 | 62% | 141.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-05-05&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.