← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-03-19 Sun | 35 | — | unknown | 20:10–21:30 (good, 1.33 h) | 72.6° 16:20 | 8.75 | 2% | 45.8° |
| 2045-03-20 Mon | 33 | — | unknown | 20:10–21:25 (good, 1.25 h) | 72.6° 16:15 | 8.7 | 5% | 32.9° |
| 2045-03-21 Tue | 29 | — | unknown | 20:10–21:20 (good, 1.17 h) | 72.6° 16:10 | 8.65 | 11% | 19.9° |
| 2045-03-22 Wed | 24 | — | unknown | 20:10–21:10 (good, 1.0 h) | 72.6° 16:10 | 8.6 | 18% | 6.7° |
| 2045-03-23 Thu | 19 | — | unknown | 20:15–21:00 (good, 0.75 h) | 72.6° 16:05 | 8.54 | 27% | 7.0° |
| 2045-03-24 Fri | 14 | — | unknown | 20:15–20:35 (good, 0.33 h) | 72.6° 16:00 | 8.49 | 38% | 20.6° |
| 2045-03-25 Sat | 11 | — | unknown | 20:15–21:30 (marginal, 1.25 h) | 72.6° 15:55 | 8.44 | 49% | 34.5° |
| 2045-03-26 Sun | 9 | — | unknown | 21:15–22:20 (marginal, 1.08 h) | 72.6° 16:50 | 8.39 | 60% | 48.5° |
| 2045-03-27 Mon | 8 | — | unknown | 21:20–22:15 (marginal, 0.92 h) | 72.6° 16:50 | 8.33 | 71% | 62.8° |
| 2045-03-28 Tue | 8 | — | unknown | 21:20–22:15 (marginal, 0.92 h) | 72.6° 16:45 | 8.28 | 81% | 77.3° |
| 2045-03-29 Wed | 9 | — | unknown | 21:20–22:15 (marginal, 0.92 h) | 72.6° 16:40 | 8.22 | 89% | 91.8° |
| 2045-03-30 Thu | 10 | — | unknown | 21:20–21:25 (good, 0.08 h) | 72.6° 16:35 | 8.17 | 95% | 106.3° |
| 2045-03-31 Fri | 10 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.6° 16:35 | 8.12 | 99% | 120.7° |
| 2045-04-01 Sat | 9 | — | unknown | 21:25–21:30 (good, 0.08 h) | 72.6° 16:30 | 8.06 | 100% | 135.0° |
| 2045-04-02 Sun | 9 | — | unknown | 21:25–21:30 (good, 0.08 h) | 72.6° 16:25 | 8.01 | 98% | 148.9° |
| 2045-04-03 Mon | 8 | — | unknown | 20:55–22:00 (marginal, 1.08 h) | 72.6° 16:20 | 7.95 | 94% | 162.5° |
| 2045-04-04 Tue | 7 | — | unknown | 20:55–21:55 (marginal, 1.0 h) | 72.6° 16:15 | 7.89 | 88% | 175.6° |
| 2045-04-05 Wed | 6 | — | unknown | 20:55–21:25 (marginal, 0.5 h) | 72.6° 16:15 | 7.84 | 81% | 171.4° |
| 2045-04-06 Thu | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 72.6° 16:10 | 7.78 | 72% | 158.9° |
| 2045-04-07 Fri | 3 | — | unknown | 21:00–21:15 (marginal, 0.25 h) | 72.6° 16:05 | 7.73 | 63% | 146.7° |
| 2045-04-08 Sat | 3 | — | unknown | 21:00–21:10 (marginal, 0.17 h) | 72.6° 16:00 | 7.67 | 54% | 134.7° |
| 2045-04-09 Sun | 2 | — | unknown | 21:00–21:10 (marginal, 0.17 h) | 72.6° 15:55 | 7.61 | 44% | 122.8° |
| 2045-04-10 Mon | 1 | — | unknown | 21:00–21:05 (marginal, 0.08 h) | 72.6° 15:55 | 7.56 | 35% | 111.0° |
| 2045-04-11 Tue | 1 | — | unknown | — | 72.6° 15:50 | 7.5 | 26% | 99.1° |
| 2045-04-12 Wed | 1 | — | unknown | — | 72.6° 15:45 | 7.44 | 18% | 87.1° |
| 2045-04-13 Thu | 1 | — | unknown | — | 72.6° 15:40 | 7.39 | 12% | 75.0° |
| 2045-04-14 Fri | 1 | — | unknown | — | 72.6° 15:40 | 7.33 | 6% | 62.6° |
| 2045-04-15 Sat | 0 | — | unknown | — | 72.6° 15:35 | 7.27 | 2% | 49.9° |
| 2045-04-16 Sun | 0 | — | unknown | — | 72.6° 15:30 | 7.21 | 0% | 37.0° |
| 2045-04-17 Mon | 0 | — | unknown | — | 72.6° 15:25 | 7.15 | 1% | 23.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-03-19&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.