← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-04-18 Mon | 0 | — | unknown | — | 89.5° 12:20 | 7.08 | 65% | 105.5° |
| 2044-04-19 Tue | 0 | — | unknown | — | 89.7° 12:15 | 7.02 | 55% | 95.3° |
| 2044-04-20 Wed | 0 | — | unknown | — | 89.8° 12:10 | 6.97 | 46% | 84.9° |
| 2044-04-21 Thu | 0 | — | unknown | — | 89.8° 12:05 | 6.91 | 36% | 74.3° |
| 2044-04-22 Fri | 0 | — | unknown | — | 89.6° 12:00 | 6.85 | 27% | 63.7° |
| 2044-04-23 Sat | 0 | — | unknown | — | 89.7° 11:55 | 6.79 | 18% | 53.3° |
| 2044-04-24 Sun | 0 | — | unknown | — | 89.8° 11:50 | 6.73 | 11% | 43.4° |
| 2044-04-25 Mon | 0 | — | unknown | — | 89.7° 11:45 | 6.67 | 5% | 35.1° |
| 2044-04-26 Tue | 1 | — | unknown | — | 89.5° 11:40 | 6.62 | 1% | 30.4° |
| 2044-04-27 Wed | 1 | — | unknown | — | 89.6° 11:40 | 6.56 | 0% | 31.4° |
| 2044-04-28 Thu | 1 | — | unknown | — | 89.8° 11:35 | 6.5 | 2% | 38.0° |
| 2044-04-29 Fri | 1 | — | unknown | — | 89.8° 11:30 | 6.44 | 6% | 47.9° |
| 2044-04-30 Sat | 1 | — | unknown | — | 89.7° 11:25 | 6.38 | 14% | 59.4° |
| 2044-05-01 Sun | 1 | — | unknown | — | 89.5° 11:25 | 6.33 | 23% | 71.6° |
| 2044-05-02 Mon | 1 | — | unknown | — | 89.7° 11:20 | 6.27 | 33% | 84.0° |
| 2044-05-03 Tue | 1 | — | unknown | — | 89.8° 11:15 | 6.21 | 44% | 96.2° |
| 2044-05-04 Wed | 1 | — | unknown | — | 89.8° 11:10 | 6.15 | 56% | 108.1° |
| 2044-05-05 Thu | 2 | — | unknown | — | 89.6° 11:05 | 6.1 | 66% | 119.4° |
| 2044-05-06 Fri | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.6° 11:05 | 6.04 | 76% | 129.9° |
| 2044-05-07 Sat | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.7° 11:00 | 5.98 | 84% | 139.1° |
| 2044-05-08 Sun | 2 | — | unknown | 04:50–05:00 (marginal, 0.17 h) | 89.8° 10:55 | 5.93 | 91% | 146.1° |
| 2044-05-09 Mon | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.7° 10:50 | 5.87 | 96% | 149.7° |
| 2044-05-10 Tue | 3 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.5° 10:45 | 5.81 | 99% | 148.8° |
| 2044-05-11 Wed | 3 | — | unknown | 04:05–04:15 (marginal, 0.17 h) | 89.6° 10:45 | 5.76 | 100% | 144.0° |
| 2044-05-12 Thu | 3 | — | unknown | 04:00–04:10 (marginal, 0.17 h) | 89.8° 10:40 | 5.7 | 99% | 136.6° |
| 2044-05-13 Fri | 4 | — | unknown | 04:40–04:55 (marginal, 0.25 h) | 89.8° 10:35 | 5.65 | 96% | 127.8° |
| 2044-05-14 Sat | 4 | — | unknown | 03:55–04:10 (marginal, 0.25 h) | 89.7° 10:30 | 5.6 | 92% | 118.3° |
| 2044-05-15 Sun | 4 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 89.5° 10:30 | 5.54 | 86% | 108.4° |
| 2044-05-16 Mon | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.7° 10:25 | 5.49 | 79% | 98.3° |
| 2044-05-17 Tue | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.8° 10:20 | 5.44 | 71% | 88.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-04-18&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.