← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-07-21 Fri | 0 | — | unknown | — | 50.1° 17:55 | 5.29 | 59% | 35.6° |
| 2045-07-22 Sat | 0 | — | unknown | — | 50.1° 17:50 | 5.34 | 69% | 48.2° |
| 2045-07-23 Sun | 0 | — | unknown | — | 50.1° 17:45 | 5.39 | 78% | 60.6° |
| 2045-07-24 Mon | 0 | — | unknown | — | 50.1° 17:40 | 5.44 | 86% | 72.9° |
| 2045-07-25 Tue | 0 | — | unknown | — | 50.1° 17:40 | 5.49 | 92% | 85.0° |
| 2045-07-26 Wed | 0 | — | unknown | — | 50.1° 17:35 | 5.55 | 96% | 96.9° |
| 2045-07-27 Thu | 0 | — | unknown | — | 50.1° 17:30 | 5.6 | 99% | 108.8° |
| 2045-07-28 Fri | 0 | — | unknown | — | 50.1° 17:25 | 5.65 | 100% | 120.5° |
| 2045-07-29 Sat | 0 | — | unknown | — | 50.1° 17:20 | 5.71 | 99% | 132.2° |
| 2045-07-30 Sun | 0 | — | unknown | — | 50.1° 17:20 | 5.76 | 96% | 143.7° |
| 2045-07-31 Mon | 0 | — | unknown | — | 50.1° 17:15 | 5.81 | 92% | 155.1° |
| 2045-08-01 Tue | 0 | — | unknown | — | 50.1° 17:10 | 5.87 | 86% | 165.7° |
| 2045-08-02 Wed | 0 | — | unknown | — | 50.1° 17:05 | 5.93 | 79% | 171.6° |
| 2045-08-03 Thu | 0 | — | unknown | — | 50.1° 17:00 | 5.98 | 70% | 164.9° |
| 2045-08-04 Fri | 0 | — | unknown | — | 50.1° 17:00 | 6.04 | 61% | 153.7° |
| 2045-08-05 Sat | 0 | — | unknown | — | 50.1° 16:55 | 6.09 | 51% | 141.5° |
| 2045-08-06 Sun | 0 | — | unknown | — | 50.1° 16:50 | 6.15 | 40% | 128.6° |
| 2045-08-07 Mon | 0 | — | unknown | — | 50.1° 16:45 | 6.21 | 30% | 115.3° |
| 2045-08-08 Tue | 0 | — | unknown | — | 50.1° 16:45 | 6.26 | 20% | 101.5° |
| 2045-08-09 Wed | 0 | — | unknown | — | 50.1° 16:40 | 6.32 | 11% | 87.2° |
| 2045-08-10 Thu | 0 | — | unknown | — | 50.1° 16:35 | 6.38 | 5% | 72.5° |
| 2045-08-11 Fri | 0 | — | unknown | — | 50.1° 16:30 | 6.44 | 1% | 57.6° |
| 2045-08-12 Sat | 0 | — | unknown | — | 50.1° 16:25 | 6.49 | 0% | 42.7° |
| 2045-08-13 Sun | 0 | — | unknown | — | 50.1° 16:25 | 6.55 | 2% | 28.0° |
| 2045-08-14 Mon | 0 | — | unknown | — | 50.1° 16:20 | 6.61 | 7% | 14.4° |
| 2045-08-15 Tue | 0 | — | unknown | — | 50.1° 16:15 | 6.67 | 14% | 8.9° |
| 2045-08-16 Wed | 0 | — | unknown | — | 50.1° 16:10 | 6.72 | 24% | 19.0° |
| 2045-08-17 Thu | 0 | — | unknown | — | 50.1° 16:05 | 6.78 | 34% | 31.9° |
| 2045-08-18 Fri | 0 | — | unknown | — | 50.1° 16:05 | 6.84 | 44% | 44.8° |
| 2045-08-19 Sat | 0 | — | unknown | — | 50.1° 16:00 | 6.9 | 55% | 57.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-07-21&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.