← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-09-15 Sat | 0 | — | unknown | — | 50.1° 14:15 | 8.38 | 100% | 169.4° |
| 2046-09-16 Sun | 0 | — | unknown | — | 50.1° 14:10 | 8.43 | 97% | 168.6° |
| 2046-09-17 Mon | 0 | — | unknown | — | 50.1° 14:05 | 8.49 | 94% | 159.4° |
| 2046-09-18 Tue | 0 | — | unknown | — | 50.1° 14:00 | 8.54 | 88% | 148.4° |
| 2046-09-19 Wed | 0 | — | unknown | — | 50.1° 14:00 | 8.59 | 82% | 136.8° |
| 2046-09-20 Thu | 0 | — | unknown | — | 50.1° 13:55 | 8.64 | 73% | 125.0° |
| 2046-09-21 Fri | 0 | — | unknown | — | 50.1° 13:50 | 8.69 | 64% | 112.9° |
| 2046-09-22 Sat | 0 | — | unknown | — | 50.1° 13:45 | 8.74 | 54% | 100.4° |
| 2046-09-23 Sun | 0 | — | unknown | — | 50.1° 13:45 | 8.79 | 44% | 87.7° |
| 2046-09-24 Mon | 0 | — | unknown | — | 50.1° 13:40 | 8.84 | 33% | 74.5° |
| 2046-09-25 Tue | 0 | — | unknown | — | 50.1° 13:35 | 8.89 | 23% | 60.9° |
| 2046-09-26 Wed | 0 | — | unknown | — | 50.1° 13:30 | 8.94 | 14% | 46.9° |
| 2046-09-27 Thu | 0 | — | unknown | — | 50.1° 13:25 | 8.99 | 7% | 32.6° |
| 2046-09-28 Fri | 0 | — | unknown | — | 50.1° 13:25 | 9.04 | 2% | 18.8° |
| 2046-09-29 Sat | 0 | — | unknown | — | 50.1° 13:20 | 9.09 | 0% | 9.3° |
| 2046-09-30 Sun | 0 | — | unknown | — | 50.1° 13:15 | 9.14 | 1% | 16.9° |
| 2046-10-01 Mon | 0 | — | unknown | — | 50.1° 13:10 | 9.19 | 5% | 30.6° |
| 2046-10-02 Tue | 0 | — | unknown | — | 50.1° 13:05 | 9.24 | 12% | 44.8° |
| 2046-10-03 Wed | 0 | — | unknown | — | 50.1° 13:05 | 9.28 | 20% | 58.9° |
| 2046-10-04 Thu | 0 | — | unknown | — | 50.1° 13:00 | 9.33 | 30% | 72.6° |
| 2046-10-05 Fri | 0 | — | unknown | — | 50.1° 12:55 | 9.38 | 40% | 85.9° |
| 2046-10-06 Sat | 0 | — | unknown | — | 50.1° 12:50 | 9.42 | 51% | 98.8° |
| 2046-10-07 Sun | 0 | — | unknown | — | 50.1° 12:50 | 9.47 | 61% | 111.2° |
| 2046-10-08 Mon | 0 | — | unknown | — | 50.1° 12:45 | 9.52 | 70% | 123.4° |
| 2046-10-09 Tue | 0 | — | unknown | — | 50.1° 12:40 | 9.56 | 78% | 135.3° |
| 2046-10-10 Wed | 0 | — | unknown | — | 50.1° 12:35 | 9.61 | 86% | 146.8° |
| 2046-10-11 Thu | 0 | — | unknown | — | 50.1° 12:30 | 9.65 | 92% | 157.9° |
| 2046-10-12 Fri | 0 | — | unknown | — | 50.1° 12:30 | 9.7 | 96% | 167.6° |
| 2046-10-13 Sat | 0 | — | unknown | — | 50.1° 12:25 | 9.74 | 99% | 170.0° |
| 2046-10-14 Sun | 0 | — | unknown | — | 50.1° 12:20 | 9.78 | 100% | 162.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-09-15&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.