← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-03-27 Tue | 20 | — | unknown | 21:20–21:55 (good, 0.58 h) | 42.9° 18:40 | 8.35 | 64% | 147.3° |
| 2046-03-28 Wed | 19 | — | unknown | 21:20–21:55 (good, 0.58 h) | 42.9° 18:35 | 8.29 | 54% | 146.4° |
| 2046-03-29 Thu | 17 | — | unknown | 21:20–21:50 (good, 0.5 h) | 42.9° 18:30 | 8.24 | 44% | 141.6° |
| 2046-03-30 Fri | 15 | — | unknown | 21:20–21:45 (good, 0.42 h) | 42.9° 18:25 | 8.18 | 34% | 134.5° |
| 2046-03-31 Sat | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 42.9° 18:20 | 8.13 | 25% | 126.0° |
| 2046-04-01 Sun | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 42.9° 18:20 | 8.07 | 18% | 116.7° |
| 2046-04-02 Mon | 10 | — | unknown | 21:25–21:35 (good, 0.17 h) | 42.9° 18:15 | 8.02 | 11% | 107.1° |
| 2046-04-03 Tue | 8 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:10 | 7.96 | 6% | 97.2° |
| 2046-04-04 Wed | 7 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 42.9° 18:05 | 7.91 | 2% | 87.3° |
| 2046-04-05 Thu | 6 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.85 | 0% | 77.2° |
| 2046-04-06 Fri | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.8 | 0% | 67.3° |
| 2046-04-07 Sat | 3 | — | unknown | 21:00–21:15 (marginal, 0.25 h) | 42.9° 17:55 | 7.74 | 2% | 57.6° |
| 2046-04-08 Sun | 3 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 42.9° 17:50 | 7.68 | 6% | 48.5° |
| 2046-04-09 Mon | 2 | — | unknown | — | 42.9° 17:45 | 7.63 | 11% | 40.5° |
| 2046-04-10 Tue | 1 | — | unknown | — | 42.9° 17:45 | 7.57 | 18% | 34.7° |
| 2046-04-11 Wed | 1 | — | unknown | — | 42.9° 17:40 | 7.51 | 27% | 32.4° |
| 2046-04-12 Thu | 0 | — | unknown | — | 42.9° 17:35 | 7.46 | 37% | 34.6° |
| 2046-04-13 Fri | 0 | — | unknown | — | 42.9° 17:30 | 7.4 | 48% | 40.8° |
| 2046-04-14 Sat | 0 | — | unknown | — | 42.9° 17:25 | 7.34 | 59% | 49.8° |
| 2046-04-15 Sun | 0 | — | unknown | — | 42.9° 17:25 | 7.28 | 70% | 60.5° |
| 2046-04-16 Mon | 0 | — | unknown | — | 42.9° 17:20 | 7.23 | 80% | 72.2° |
| 2046-04-17 Tue | 0 | — | unknown | — | 42.9° 17:15 | 7.17 | 88% | 84.6° |
| 2046-04-18 Wed | 0 | — | unknown | — | 42.9° 17:10 | 7.11 | 95% | 97.2° |
| 2046-04-19 Thu | 0 | — | unknown | — | 42.9° 17:05 | 7.05 | 99% | 109.7° |
| 2046-04-20 Fri | 0 | — | unknown | — | 42.9° 17:05 | 6.99 | 100% | 121.6° |
| 2046-04-21 Sat | 0 | — | unknown | — | 42.9° 17:00 | 6.94 | 98% | 132.4° |
| 2046-04-22 Sun | 0 | — | unknown | — | 42.9° 16:55 | 6.88 | 94% | 141.2° |
| 2046-04-23 Mon | 0 | — | unknown | — | 42.9° 16:50 | 6.82 | 87% | 146.6° |
| 2046-04-24 Tue | 0 | — | unknown | — | 42.9° 16:50 | 6.76 | 79% | 147.5° |
| 2046-04-25 Wed | 0 | — | unknown | — | 42.9° 16:45 | 6.7 | 70% | 143.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-03-27&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.