← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-03-10 Fri | 14 | — | unknown | 19:55–20:15 (good, 0.33 h) | 79.2° 14:45 | 9.2 | 46% | 127.3° |
| 2045-03-11 Sat | 11 | — | unknown | 20:00–20:10 (good, 0.17 h) | 79.2° 14:40 | 9.16 | 37% | 115.9° |
| 2045-03-12 Sun | 9 | — | unknown | 20:00–20:10 (good, 0.17 h) | 79.2° 14:35 | 9.11 | 28% | 104.5° |
| 2045-03-13 Mon | 8 | — | unknown | 20:00–20:05 (good, 0.08 h) | 79.2° 14:30 | 9.06 | 20% | 93.1° |
| 2045-03-14 Tue | 7 | — | unknown | 19:30–20:30 (marginal, 1.0 h) | 79.2° 14:25 | 9.01 | 13% | 81.7° |
| 2045-03-15 Wed | 5 | — | unknown | 20:05–20:25 (marginal, 0.33 h) | 79.2° 14:25 | 8.96 | 7% | 70.1° |
| 2045-03-16 Thu | 4 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.2° 14:20 | 8.91 | 3% | 58.6° |
| 2045-03-17 Fri | 3 | — | unknown | 19:35–19:50 (marginal, 0.25 h) | 79.2° 14:15 | 8.86 | 1% | 47.0° |
| 2045-03-18 Sat | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.2° 14:10 | 8.8 | 0% | 35.5° |
| 2045-03-19 Sun | 2 | — | unknown | 19:35–19:40 (marginal, 0.08 h) | 79.2° 14:10 | 8.75 | 2% | 24.7° |
| 2045-03-20 Mon | 1 | — | unknown | — | 79.2° 14:05 | 8.7 | 5% | 16.4° |
| 2045-03-21 Tue | 1 | — | unknown | — | 79.2° 14:00 | 8.65 | 11% | 15.9° |
| 2045-03-22 Wed | 1 | — | unknown | — | 79.2° 13:55 | 8.6 | 18% | 24.0° |
| 2045-03-23 Thu | 0 | — | unknown | — | 79.2° 13:50 | 8.54 | 27% | 35.5° |
| 2045-03-24 Fri | 0 | — | unknown | — | 79.2° 13:50 | 8.49 | 38% | 48.1° |
| 2045-03-25 Sat | 0 | — | unknown | — | 79.2° 13:45 | 8.44 | 49% | 61.3° |
| 2045-03-26 Sun | 0 | — | unknown | — | 79.2° 14:40 | 8.39 | 60% | 74.8° |
| 2045-03-27 Mon | 0 | — | unknown | — | 79.2° 14:35 | 8.33 | 71% | 88.6° |
| 2045-03-28 Tue | 0 | — | unknown | — | 79.2° 14:30 | 8.28 | 81% | 102.6° |
| 2045-03-29 Wed | 0 | — | unknown | — | 79.2° 14:30 | 8.22 | 89% | 116.6° |
| 2045-03-30 Thu | 0 | — | unknown | — | 79.2° 14:25 | 8.17 | 95% | 130.4° |
| 2045-03-31 Fri | 0 | — | unknown | — | 79.2° 14:20 | 8.12 | 99% | 143.8° |
| 2045-04-01 Sat | 0 | — | unknown | — | 79.2° 14:15 | 8.06 | 100% | 155.9° |
| 2045-04-02 Sun | 0 | — | unknown | — | 79.2° 14:15 | 8.01 | 98% | 164.3° |
| 2045-04-03 Mon | 0 | — | unknown | — | 79.2° 14:10 | 7.95 | 94% | 163.1° |
| 2045-04-04 Tue | 0 | — | unknown | — | 79.2° 14:05 | 7.89 | 88% | 154.1° |
| 2045-04-05 Wed | 0 | — | unknown | — | 79.2° 14:00 | 7.84 | 81% | 142.9° |
| 2045-04-06 Thu | 0 | — | unknown | — | 79.2° 13:55 | 7.78 | 72% | 131.4° |
| 2045-04-07 Fri | 0 | — | unknown | — | 79.2° 13:55 | 7.73 | 63% | 119.8° |
| 2045-04-08 Sat | 0 | — | unknown | — | 79.2° 13:50 | 7.67 | 54% | 108.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-03-10&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.