← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-03-17 Fri | 36 | — | unknown | 20:05–21:35 (good, 1.5 h) | 42.9° 18:15 | 8.86 | 1% | 94.4° |
| 2045-03-18 Sat | 35 | — | unknown | 20:05–21:30 (good, 1.42 h) | 42.9° 18:10 | 8.8 | 0% | 84.0° |
| 2045-03-19 Sun | 33 | — | unknown | 20:10–21:25 (good, 1.25 h) | 42.9° 18:10 | 8.75 | 2% | 73.6° |
| 2045-03-20 Mon | 31 | — | unknown | 20:10–21:25 (good, 1.25 h) | 42.9° 18:05 | 8.7 | 5% | 63.3° |
| 2045-03-21 Tue | 28 | — | unknown | 20:10–21:15 (good, 1.08 h) | 42.9° 18:00 | 8.65 | 11% | 53.3° |
| 2045-03-22 Wed | 23 | — | unknown | 20:10–21:05 (good, 0.92 h) | 42.9° 17:55 | 8.6 | 18% | 44.4° |
| 2045-03-23 Thu | 19 | — | unknown | 20:15–20:55 (good, 0.67 h) | 42.9° 17:50 | 8.54 | 27% | 37.3° |
| 2045-03-24 Fri | 14 | — | unknown | 20:15–20:25 (good, 0.17 h) | 42.9° 17:50 | 8.49 | 38% | 33.7° |
| 2045-03-25 Sat | 10 | — | unknown | 20:15–21:30 (marginal, 1.25 h) | 42.9° 17:45 | 8.44 | 49% | 34.8° |
| 2045-03-26 Sun | 7 | — | unknown | 21:15–22:15 (marginal, 1.0 h) | 42.9° 18:40 | 8.39 | 60% | 40.4° |
| 2045-03-27 Mon | 6 | — | unknown | 21:20–22:05 (marginal, 0.75 h) | 42.9° 18:35 | 8.33 | 71% | 49.2° |
| 2045-03-28 Tue | 5 | — | unknown | 21:20–22:00 (marginal, 0.67 h) | 42.9° 18:35 | 8.28 | 81% | 59.7° |
| 2045-03-29 Wed | 6 | — | unknown | 21:20–22:00 (marginal, 0.67 h) | 42.9° 18:30 | 8.22 | 89% | 71.3° |
| 2045-03-30 Thu | 6 | — | unknown | 21:20–22:05 (marginal, 0.75 h) | 42.9° 18:25 | 8.17 | 95% | 83.2° |
| 2045-03-31 Fri | 7 | — | unknown | 21:25–22:10 (marginal, 0.75 h) | 42.9° 18:20 | 8.12 | 99% | 95.3° |
| 2045-04-01 Sat | 8 | — | unknown | 21:25–22:05 (marginal, 0.67 h) | 42.9° 18:15 | 8.06 | 100% | 107.0° |
| 2045-04-02 Sun | 8 | — | unknown | 20:50–22:05 (marginal, 1.25 h) | 42.9° 18:15 | 8.01 | 98% | 118.2° |
| 2045-04-03 Mon | 7 | — | unknown | 20:55–22:00 (marginal, 1.08 h) | 42.9° 18:10 | 7.95 | 94% | 128.4° |
| 2045-04-04 Tue | 6 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 42.9° 18:05 | 7.89 | 88% | 137.1° |
| 2045-04-05 Wed | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.84 | 81% | 143.4° |
| 2045-04-06 Thu | 4 | — | unknown | 21:30–21:45 (marginal, 0.25 h) | 42.9° 17:55 | 7.78 | 72% | 146.4° |
| 2045-04-07 Fri | 3 | — | unknown | 21:00–21:15 (marginal, 0.25 h) | 42.9° 17:55 | 7.73 | 63% | 145.6° |
| 2045-04-08 Sat | 3 | — | unknown | 21:00–21:10 (marginal, 0.17 h) | 42.9° 17:50 | 7.67 | 54% | 141.3° |
| 2045-04-09 Sun | 2 | — | unknown | 21:00–21:05 (marginal, 0.08 h) | 42.9° 17:45 | 7.61 | 44% | 134.6° |
| 2045-04-10 Mon | 1 | — | unknown | — | 42.9° 17:40 | 7.56 | 35% | 126.5° |
| 2045-04-11 Tue | 1 | — | unknown | — | 42.9° 17:40 | 7.5 | 26% | 117.5° |
| 2045-04-12 Wed | 1 | — | unknown | — | 42.9° 17:35 | 7.44 | 18% | 107.9° |
| 2045-04-13 Thu | 1 | — | unknown | — | 42.9° 17:30 | 7.39 | 12% | 97.8° |
| 2045-04-14 Fri | 1 | — | unknown | — | 42.9° 17:25 | 7.33 | 6% | 87.5° |
| 2045-04-15 Sat | 0 | — | unknown | — | 42.9° 17:20 | 7.27 | 2% | 77.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-03-17&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.