← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-09-20 Sat | 0 | 0 | 0 | — | 50.2° 13:55 | 8.64 | 1% | 18.6° |
| 2025-09-21 Sun | 0 | 0 | 0 | — | 50.2° 13:50 | 8.7 | 0% | 8.1° |
| 2025-09-22 Mon | 0 | 0 | 0 | — | 50.2° 13:45 | 8.75 | 1% | 9.6° |
| 2025-09-23 Tue | 0 | 0 | 0 | — | 50.2° 13:40 | 8.8 | 4% | 20.3° |
| 2025-09-24 Wed | 0 | 0 | 0 | — | 50.2° 13:35 | 8.85 | 9% | 31.9° |
| 2025-09-25 Thu | 0 | 0 | 0 | — | 50.2° 13:35 | 8.9 | 15% | 43.5° |
| 2025-09-26 Fri | 0 | 0 | 0 | — | 50.2° 13:30 | 8.95 | 22% | 55.2° |
| 2025-09-27 Sat | 0 | 0 | 0 | — | 50.2° 13:25 | 9.0 | 31% | 66.9° |
| 2025-09-28 Sun | 0 | 0 | 0 | — | 50.2° 13:20 | 9.05 | 40% | 78.8° |
| 2025-09-29 Mon | 0 | 0 | 0 | — | 50.2° 13:20 | 9.09 | 49% | 90.8° |
| 2025-09-30 Tue | 0 | 0 | 0 | — | 50.2° 13:15 | 9.14 | 59% | 103.0° |
| 2025-10-01 Wed | 0 | 0 | 0 | — | 50.2° 13:10 | 9.19 | 69% | 115.5° |
| 2025-10-02 Thu | 0 | 0 | 0 | — | 50.2° 13:05 | 9.24 | 78% | 128.5° |
| 2025-10-03 Fri | 0 | 0 | 0 | — | 50.2° 13:00 | 9.29 | 86% | 141.8° |
| 2025-10-04 Sat | 0 | 0 | 0 | — | 50.2° 13:00 | 9.33 | 93% | 155.4° |
| 2025-10-05 Sun | 0 | 0 | 0 | — | 50.2° 12:55 | 9.38 | 98% | 168.7° |
| 2025-10-06 Mon | 0 | 0 | 0 | — | 50.2° 12:50 | 9.43 | 100% | 171.8° |
| 2025-10-07 Tue | 0 | 0 | 0 | — | 50.2° 12:45 | 9.47 | 99% | 158.8° |
| 2025-10-08 Wed | 0 | 0 | 0 | — | 50.2° 12:40 | 9.52 | 95% | 144.2° |
| 2025-10-09 Thu | 0 | 0 | 0 | — | 50.2° 12:40 | 9.57 | 89% | 129.4° |
| 2025-10-10 Fri | 0 | 0 | 0 | — | 50.2° 12:35 | 9.61 | 80% | 114.8° |
| 2025-10-11 Sat | 0 | 0 | 0 | — | 50.2° 12:30 | 9.66 | 70% | 100.4° |
| 2025-10-12 Sun | 0 | 0 | 0 | — | 50.2° 12:25 | 9.7 | 59% | 86.4° |
| 2025-10-13 Mon | 0 | 0 | 0 | — | 50.2° 12:25 | 9.74 | 48% | 72.7° |
| 2025-10-14 Tue | 0 | 0 | 0 | — | 50.2° 12:20 | 9.79 | 38% | 59.4° |
| 2025-10-15 Wed | 0 | 0 | 0 | — | 50.2° 12:15 | 9.83 | 28% | 46.5° |
| 2025-10-16 Thu | 0 | 0 | 0 | — | 50.2° 12:10 | 9.87 | 19% | 33.9° |
| 2025-10-17 Fri | 0 | 0 | 0 | — | 50.2° 12:05 | 9.92 | 12% | 21.7° |
| 2025-10-18 Sat | 0 | 0 | 0 | — | 50.2° 12:00 | 9.96 | 6% | 10.5° |
| 2025-10-19 Sun | 0 | 0 | 0 | — | 50.2° 11:55 | 10.0 | 2% | 7.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-09-20&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.