← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-03-09 Thu | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.8° 13:55 | 9.25 | 56% | 129.5° |
| 2045-03-10 Fri | 9 | — | unknown | 19:55–20:00 (good, 0.08 h) | 89.6° 13:50 | 9.2 | 46% | 119.7° |
| 2045-03-11 Sat | 7 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 89.6° 13:50 | 9.16 | 37% | 109.5° |
| 2045-03-12 Sun | 6 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.8° 13:45 | 9.11 | 28% | 99.3° |
| 2045-03-13 Mon | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.8° 13:40 | 9.06 | 20% | 89.0° |
| 2045-03-14 Tue | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.7° 13:35 | 9.01 | 13% | 78.6° |
| 2045-03-15 Wed | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 89.5° 13:30 | 8.96 | 7% | 68.3° |
| 2045-03-16 Thu | 3 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.7° 13:30 | 8.91 | 3% | 58.2° |
| 2045-03-17 Fri | 1 | — | unknown | — | 89.8° 13:25 | 8.86 | 1% | 48.4° |
| 2045-03-18 Sat | 1 | — | unknown | — | 89.8° 13:20 | 8.8 | 0% | 39.6° |
| 2045-03-19 Sun | 1 | — | unknown | — | 89.6° 13:15 | 8.75 | 2% | 32.6° |
| 2045-03-20 Mon | 1 | — | unknown | — | 89.5° 13:15 | 8.7 | 5% | 29.1° |
| 2045-03-21 Tue | 1 | — | unknown | — | 89.7° 13:10 | 8.65 | 11% | 30.6° |
| 2045-03-22 Wed | 0 | — | unknown | — | 89.8° 13:05 | 8.6 | 18% | 36.7° |
| 2045-03-23 Thu | 0 | — | unknown | — | 89.8° 13:00 | 8.54 | 27% | 45.7° |
| 2045-03-24 Fri | 0 | — | unknown | — | 89.6° 12:55 | 8.49 | 38% | 56.4° |
| 2045-03-25 Sat | 0 | — | unknown | — | 89.6° 12:55 | 8.44 | 49% | 68.0° |
| 2045-03-26 Sun | 0 | — | unknown | — | 89.8° 13:50 | 8.39 | 60% | 80.2° |
| 2045-03-27 Mon | 0 | — | unknown | — | 89.8° 13:45 | 8.33 | 71% | 92.7° |
| 2045-03-28 Tue | 0 | — | unknown | — | 89.7° 13:40 | 8.28 | 81% | 105.2° |
| 2045-03-29 Wed | 0 | — | unknown | — | 89.5° 13:35 | 8.22 | 89% | 117.6° |
| 2045-03-30 Thu | 0 | — | unknown | — | 89.6° 13:35 | 8.17 | 95% | 129.4° |
| 2045-03-31 Fri | 0 | — | unknown | — | 89.8° 13:30 | 8.12 | 99% | 139.9° |
| 2045-04-01 Sat | 0 | — | unknown | — | 89.8° 13:25 | 8.06 | 100% | 147.8° |
| 2045-04-02 Sun | 0 | — | unknown | — | 89.7° 13:20 | 8.01 | 98% | 151.0° |
| 2045-04-03 Mon | 0 | — | unknown | — | 89.5° 13:20 | 7.95 | 94% | 148.6° |
| 2045-04-04 Tue | 0 | — | unknown | — | 89.7° 13:15 | 7.89 | 88% | 141.8° |
| 2045-04-05 Wed | 0 | — | unknown | — | 89.8° 13:10 | 7.84 | 81% | 133.0° |
| 2045-04-06 Thu | 0 | — | unknown | — | 89.8° 13:05 | 7.78 | 72% | 123.1° |
| 2045-04-07 Fri | 0 | — | unknown | — | 89.6° 13:00 | 7.73 | 63% | 112.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-03-09&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.