← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-07-24 Tue | 0 | — | unknown | — | 50.1° 17:40 | 5.45 | 99% | 129.1° |
| 2040-07-25 Wed | 0 | — | unknown | — | 50.1° 17:35 | 5.5 | 95% | 144.1° |
| 2040-07-26 Thu | 0 | — | unknown | — | 50.1° 17:35 | 5.56 | 88% | 158.8° |
| 2040-07-27 Fri | 0 | — | unknown | — | 50.1° 17:30 | 5.61 | 80% | 173.1° |
| 2040-07-28 Sat | 0 | — | unknown | — | 50.1° 17:25 | 5.66 | 70% | 173.1° |
| 2040-07-29 Sun | 0 | — | unknown | — | 50.1° 17:20 | 5.72 | 60% | 159.7° |
| 2040-07-30 Mon | 0 | — | unknown | — | 50.1° 17:15 | 5.77 | 49% | 146.8° |
| 2040-07-31 Tue | 0 | — | unknown | — | 50.1° 17:15 | 5.83 | 39% | 134.2° |
| 2040-08-01 Wed | 0 | — | unknown | — | 50.1° 17:10 | 5.88 | 30% | 122.0° |
| 2040-08-02 Thu | 0 | — | unknown | — | 50.1° 17:05 | 5.94 | 22% | 109.9° |
| 2040-08-03 Fri | 0 | — | unknown | — | 50.1° 17:00 | 5.99 | 14% | 98.0° |
| 2040-08-04 Sat | 0 | — | unknown | — | 50.1° 16:55 | 6.05 | 8% | 86.1° |
| 2040-08-05 Sun | 0 | — | unknown | — | 50.1° 16:55 | 6.1 | 4% | 74.3° |
| 2040-08-06 Mon | 0 | — | unknown | — | 50.1° 16:50 | 6.16 | 1% | 62.5° |
| 2040-08-07 Tue | 0 | — | unknown | — | 50.1° 16:45 | 6.22 | 0% | 50.6° |
| 2040-08-08 Wed | 0 | — | unknown | — | 50.1° 16:40 | 6.28 | 1% | 38.6° |
| 2040-08-09 Thu | 0 | — | unknown | — | 50.1° 16:40 | 6.33 | 4% | 26.6° |
| 2040-08-10 Fri | 0 | — | unknown | — | 50.1° 16:35 | 6.39 | 8% | 14.4° |
| 2040-08-11 Sat | 0 | — | unknown | — | 50.1° 16:30 | 6.45 | 14% | 2.1° |
| 2040-08-12 Sun | 0 | — | unknown | — | 50.1° 16:25 | 6.5 | 22% | 10.6° |
| 2040-08-13 Mon | 0 | — | unknown | — | 50.1° 16:20 | 6.56 | 31% | 23.4° |
| 2040-08-14 Tue | 0 | — | unknown | — | 50.1° 16:20 | 6.62 | 41% | 36.5° |
| 2040-08-15 Wed | 0 | — | unknown | — | 50.1° 16:15 | 6.68 | 52% | 50.0° |
| 2040-08-16 Thu | 0 | — | unknown | — | 50.1° 16:10 | 6.73 | 63% | 63.8° |
| 2040-08-17 Fri | 0 | — | unknown | — | 50.1° 16:05 | 6.79 | 73% | 78.0° |
| 2040-08-18 Sat | 0 | — | unknown | — | 50.1° 16:00 | 6.85 | 83% | 92.5° |
| 2040-08-19 Sun | 0 | — | unknown | — | 50.1° 16:00 | 6.91 | 91% | 107.3° |
| 2040-08-20 Mon | 0 | — | unknown | — | 50.1° 15:55 | 6.96 | 97% | 122.4° |
| 2040-08-21 Tue | 0 | — | unknown | — | 50.1° 15:50 | 7.02 | 100% | 137.4° |
| 2040-08-22 Wed | 0 | — | unknown | — | 50.1° 15:45 | 7.08 | 99% | 152.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-07-24&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.