← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-07-30 Wed | 0 | — | unknown | — | 50.1° 17:20 | 5.74 | 96% | 99.1° |
| 2042-07-31 Thu | 0 | — | unknown | — | 50.1° 17:15 | 5.8 | 99% | 112.8° |
| 2042-08-01 Fri | 0 | — | unknown | — | 50.1° 17:10 | 5.85 | 100% | 126.8° |
| 2042-08-02 Sat | 0 | — | unknown | — | 50.1° 17:05 | 5.91 | 98% | 141.1° |
| 2042-08-03 Sun | 0 | — | unknown | — | 50.1° 17:05 | 5.97 | 93% | 155.5° |
| 2042-08-04 Mon | 0 | — | unknown | — | 50.1° 17:00 | 6.02 | 86% | 169.7° |
| 2042-08-05 Tue | 0 | — | unknown | — | 50.1° 16:55 | 6.08 | 77% | 174.0° |
| 2042-08-06 Wed | 0 | — | unknown | — | 50.1° 16:50 | 6.13 | 67% | 160.5° |
| 2042-08-07 Thu | 0 | — | unknown | — | 50.1° 16:45 | 6.19 | 56% | 146.4° |
| 2042-08-08 Fri | 0 | — | unknown | — | 50.1° 16:45 | 6.25 | 44% | 132.4° |
| 2042-08-09 Sat | 0 | — | unknown | — | 50.1° 16:40 | 6.3 | 34% | 118.6° |
| 2042-08-10 Sun | 0 | — | unknown | — | 50.1° 16:35 | 6.36 | 24% | 105.1° |
| 2042-08-11 Mon | 0 | — | unknown | — | 50.1° 16:30 | 6.42 | 15% | 91.7° |
| 2042-08-12 Tue | 0 | — | unknown | — | 50.1° 16:30 | 6.48 | 8% | 78.5° |
| 2042-08-13 Wed | 0 | — | unknown | — | 50.1° 16:25 | 6.53 | 4% | 65.6° |
| 2042-08-14 Thu | 0 | — | unknown | — | 50.1° 16:20 | 6.59 | 1% | 52.9° |
| 2042-08-15 Fri | 0 | — | unknown | — | 50.1° 16:15 | 6.65 | 0% | 40.4° |
| 2042-08-16 Sat | 0 | — | unknown | — | 50.1° 16:10 | 6.71 | 2% | 28.1° |
| 2042-08-17 Sun | 0 | — | unknown | — | 50.1° 16:10 | 6.76 | 5% | 16.2° |
| 2042-08-18 Mon | 0 | — | unknown | — | 50.1° 16:05 | 6.82 | 9% | 5.2° |
| 2042-08-19 Tue | 0 | — | unknown | — | 50.1° 16:00 | 6.88 | 16% | 8.9° |
| 2042-08-20 Wed | 0 | — | unknown | — | 50.1° 15:55 | 6.94 | 23% | 20.3° |
| 2042-08-21 Thu | 0 | — | unknown | — | 50.1° 15:50 | 6.99 | 32% | 32.0° |
| 2042-08-22 Fri | 0 | — | unknown | — | 50.1° 15:50 | 7.05 | 41% | 43.8° |
| 2042-08-23 Sat | 0 | — | unknown | — | 50.1° 15:45 | 7.11 | 50% | 55.8° |
| 2042-08-24 Sun | 0 | — | unknown | — | 50.1° 15:40 | 7.17 | 60% | 68.1° |
| 2042-08-25 Mon | 0 | — | unknown | — | 50.1° 15:35 | 7.22 | 70% | 80.7° |
| 2042-08-26 Tue | 0 | — | unknown | — | 50.1° 15:35 | 7.28 | 79% | 93.7° |
| 2042-08-27 Wed | 0 | — | unknown | — | 50.1° 15:30 | 7.34 | 87% | 107.1° |
| 2042-08-28 Thu | 0 | — | unknown | — | 50.1° 15:25 | 7.39 | 94% | 120.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-07-30&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.