← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-09-02 Sat | 0 | — | unknown | — | 50.1° 15:05 | 7.69 | 66% | 132.2° |
| 2045-09-03 Sun | 0 | — | unknown | — | 50.1° 15:00 | 7.74 | 55% | 119.4° |
| 2045-09-04 Mon | 0 | — | unknown | — | 50.1° 14:55 | 7.8 | 44% | 106.1° |
| 2045-09-05 Tue | 0 | — | unknown | — | 50.1° 14:55 | 7.86 | 34% | 92.5° |
| 2045-09-06 Wed | 0 | — | unknown | — | 50.1° 14:50 | 7.91 | 23% | 78.4° |
| 2045-09-07 Thu | 0 | — | unknown | — | 50.1° 14:45 | 7.96 | 14% | 64.0° |
| 2045-09-08 Fri | 0 | — | unknown | — | 50.1° 14:40 | 8.02 | 7% | 49.3° |
| 2045-09-09 Sat | 0 | — | unknown | — | 50.1° 14:35 | 8.07 | 2% | 34.6° |
| 2045-09-10 Sun | 0 | — | unknown | — | 50.1° 14:35 | 8.13 | 0% | 20.3° |
| 2045-09-11 Mon | 0 | — | unknown | — | 50.1° 14:30 | 8.18 | 1% | 9.1° |
| 2045-09-12 Tue | 0 | — | unknown | — | 50.1° 14:25 | 8.23 | 5% | 13.9° |
| 2045-09-13 Wed | 0 | — | unknown | — | 50.1° 14:20 | 8.29 | 11% | 26.7° |
| 2045-09-14 Thu | 0 | — | unknown | — | 50.1° 14:15 | 8.34 | 20% | 40.1° |
| 2045-09-15 Fri | 0 | — | unknown | — | 50.1° 14:15 | 8.39 | 29% | 53.2° |
| 2045-09-16 Sat | 0 | — | unknown | — | 50.1° 14:10 | 8.45 | 39% | 66.0° |
| 2045-09-17 Sun | 0 | — | unknown | — | 50.1° 14:05 | 8.5 | 49% | 78.5° |
| 2045-09-18 Mon | 0 | — | unknown | — | 50.1° 14:00 | 8.55 | 58% | 90.6° |
| 2045-09-19 Tue | 0 | — | unknown | — | 50.1° 13:55 | 8.6 | 68% | 102.5° |
| 2045-09-20 Wed | 0 | — | unknown | — | 50.1° 13:55 | 8.65 | 76% | 114.3° |
| 2045-09-21 Thu | 0 | — | unknown | — | 50.1° 13:50 | 8.7 | 84% | 126.0° |
| 2045-09-22 Fri | 0 | — | unknown | — | 50.1° 13:45 | 8.75 | 90% | 137.6° |
| 2045-09-23 Sat | 0 | — | unknown | — | 50.1° 13:40 | 8.81 | 95% | 149.1° |
| 2045-09-24 Sun | 0 | — | unknown | — | 50.1° 13:40 | 8.86 | 98% | 160.3° |
| 2045-09-25 Mon | 0 | — | unknown | — | 50.1° 13:35 | 8.91 | 100% | 169.9° |
| 2045-09-26 Tue | 0 | — | unknown | — | 50.1° 13:30 | 8.96 | 100% | 169.5° |
| 2045-09-27 Wed | 0 | — | unknown | — | 50.1° 13:25 | 9.0 | 97% | 159.5° |
| 2045-09-28 Thu | 0 | — | unknown | — | 50.1° 13:20 | 9.05 | 93% | 147.7° |
| 2045-09-29 Fri | 0 | — | unknown | — | 50.1° 13:20 | 9.1 | 87% | 135.3° |
| 2045-09-30 Sat | 0 | — | unknown | — | 50.1° 13:15 | 9.15 | 79% | 122.5° |
| 2045-10-01 Sun | 0 | — | unknown | — | 50.1° 13:10 | 9.2 | 70% | 109.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-09-02&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.