← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-07-25 Mon | 0 | — | unknown | — | 50.1° 17:40 | 5.47 | 21% | 8.5° |
| 2039-07-26 Tue | 0 | — | unknown | — | 50.1° 17:35 | 5.52 | 30% | 4.8° |
| 2039-07-27 Wed | 0 | — | unknown | — | 50.1° 17:30 | 5.57 | 41% | 18.4° |
| 2039-07-28 Thu | 0 | — | unknown | — | 50.1° 17:30 | 5.62 | 52% | 32.3° |
| 2039-07-29 Fri | 0 | — | unknown | — | 50.1° 17:25 | 5.68 | 64% | 46.4° |
| 2039-07-30 Sat | 0 | — | unknown | — | 50.1° 17:20 | 5.73 | 74% | 60.8° |
| 2039-07-31 Sun | 0 | — | unknown | — | 50.1° 17:15 | 5.78 | 84% | 75.3° |
| 2039-08-01 Mon | 0 | — | unknown | — | 50.1° 17:10 | 5.84 | 92% | 90.0° |
| 2039-08-02 Tue | 0 | — | unknown | — | 50.1° 17:10 | 5.89 | 97% | 104.7° |
| 2039-08-03 Wed | 0 | — | unknown | — | 50.1° 17:05 | 5.95 | 100% | 119.3° |
| 2039-08-04 Thu | 0 | — | unknown | — | 50.1° 17:00 | 6.01 | 100% | 133.7° |
| 2039-08-05 Fri | 0 | — | unknown | — | 50.1° 16:55 | 6.06 | 97% | 147.7° |
| 2039-08-06 Sat | 0 | — | unknown | — | 50.1° 16:50 | 6.12 | 92% | 161.5° |
| 2039-08-07 Sun | 0 | — | unknown | — | 50.1° 16:50 | 6.18 | 85% | 174.8° |
| 2039-08-08 Mon | 0 | — | unknown | — | 50.1° 16:45 | 6.23 | 77% | 172.3° |
| 2039-08-09 Tue | 0 | — | unknown | — | 50.1° 16:40 | 6.29 | 68% | 159.8° |
| 2039-08-10 Wed | 0 | — | unknown | — | 50.1° 16:35 | 6.35 | 58% | 147.5° |
| 2039-08-11 Thu | 0 | — | unknown | — | 50.1° 16:35 | 6.4 | 49% | 135.5° |
| 2039-08-12 Fri | 0 | — | unknown | — | 50.1° 16:30 | 6.46 | 40% | 123.6° |
| 2039-08-13 Sat | 0 | — | unknown | — | 50.1° 16:25 | 6.52 | 30% | 111.8° |
| 2039-08-14 Sun | 0 | — | unknown | — | 50.1° 16:20 | 6.58 | 22% | 99.9° |
| 2039-08-15 Mon | 0 | — | unknown | — | 50.1° 16:15 | 6.63 | 15% | 87.9° |
| 2039-08-16 Tue | 0 | — | unknown | — | 50.1° 16:15 | 6.69 | 9% | 75.8° |
| 2039-08-17 Wed | 0 | — | unknown | — | 50.1° 16:10 | 6.75 | 4% | 63.5° |
| 2039-08-18 Thu | 0 | — | unknown | — | 50.1° 16:05 | 6.81 | 1% | 50.9° |
| 2039-08-19 Fri | 0 | — | unknown | — | 50.1° 16:00 | 6.86 | 0% | 38.1° |
| 2039-08-20 Sat | 0 | — | unknown | — | 50.1° 15:55 | 6.92 | 1% | 25.1° |
| 2039-08-21 Sun | 0 | — | unknown | — | 50.1° 15:55 | 6.98 | 5% | 11.8° |
| 2039-08-22 Mon | 0 | — | unknown | — | 50.1° 15:50 | 7.04 | 11% | 1.7° |
| 2039-08-23 Tue | 0 | — | unknown | — | 50.1° 15:45 | 7.09 | 18% | 15.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-07-25&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.