← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-04-18 Fri | 0 | 93 | 0 | — | 72.5° 15:20 | 7.11 | 71% | 145.7° |
| 2025-04-19 Sat | 0 | 60 | 0 | — | 72.5° 15:20 | 7.05 | 62% | 133.2° |
| 2025-04-20 Sun | 0 | 26 | 0 | — | 72.5° 15:15 | 6.99 | 52% | 120.5° |
| 2025-04-21 Mon | 0 | 0 | 0 | — | 72.5° 15:10 | 6.93 | 41% | 107.4° |
| 2025-04-22 Tue | 0 | 0 | 0 | — | 72.5° 15:05 | 6.87 | 30% | 93.9° |
| 2025-04-23 Wed | 0 | 0 | 0 | — | 72.5° 15:00 | 6.81 | 21% | 79.9° |
| 2025-04-24 Thu | 0 | 0 | 0 | — | 72.5° 15:00 | 6.76 | 12% | 65.4° |
| 2025-04-25 Fri | 0 | 0 | 0 | — | 72.5° 14:55 | 6.7 | 5% | 50.6° |
| 2025-04-26 Sat | 0 | 0 | 0 | — | 72.5° 14:50 | 6.64 | 1% | 35.4° |
| 2025-04-27 Sun | 0 | 0 | 0 | — | 72.5° 14:45 | 6.58 | 0% | 20.2° |
| 2025-04-28 Mon | 0 | 0 | 0 | — | 72.5° 14:40 | 6.52 | 2% | 5.0° |
| 2025-04-29 Tue | 0 | 0 | 0 | — | 72.5° 14:40 | 6.47 | 7% | 10.1° |
| 2025-04-30 Wed | 0 | 0 | 0 | — | 72.5° 14:35 | 6.41 | 14% | 24.7° |
| 2025-05-01 Thu | 0 | 0 | 0 | — | 72.5° 14:30 | 6.35 | 23% | 38.9° |
| 2025-05-02 Fri | 0 | 0 | 0 | — | 72.5° 14:25 | 6.29 | 33% | 52.7° |
| 2025-05-03 Sat | 0 | 0 | 0 | — | 72.5° 14:20 | 6.23 | 43% | 66.0° |
| 2025-05-04 Sun | 0 | 0 | 0 | — | 72.5° 14:20 | 6.18 | 54% | 78.9° |
| 2025-05-05 Mon | 0 | 0 | 0 | — | 72.5° 14:15 | 6.12 | 64% | 91.4° |
| 2025-05-06 Tue | 0 | 0 | 0 | — | 72.5° 14:10 | 6.06 | 73% | 103.7° |
| 2025-05-07 Wed | 0 | 0 | 0 | — | 72.5° 14:05 | 6.0 | 81% | 115.8° |
| 2025-05-08 Thu | 0 | 0 | 0 | — | 72.5° 14:05 | 5.95 | 88% | 127.7° |
| 2025-05-09 Fri | 0 | 0 | 0 | — | 72.5° 14:00 | 5.89 | 93% | 139.6° |
| 2025-05-10 Sat | 0 | 0 | 0 | — | 72.5° 13:55 | 5.84 | 97% | 151.4° |
| 2025-05-11 Sun | 0 | 0 | 0 | — | 72.5° 13:50 | 5.78 | 99% | 163.2° |
| 2025-05-12 Mon | 0 | 0 | 0 | — | 72.5° 13:45 | 5.73 | 100% | 175.1° |
| 2025-05-13 Tue | 0 | 0 | 0 | — | 72.5° 13:45 | 5.67 | 98% | 172.9° |
| 2025-05-14 Wed | 0 | 0 | 0 | — | 72.5° 13:40 | 5.62 | 95% | 160.9° |
| 2025-05-15 Thu | 0 | 0 | 0 | — | 72.5° 13:35 | 5.56 | 90% | 148.7° |
| 2025-05-16 Fri | 0 | 0 | 0 | — | 72.5° 13:30 | 5.51 | 84% | 136.3° |
| 2025-05-17 Sat | 0 | 0 | 0 | — | 72.5° 13:25 | 5.46 | 76% | 123.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-04-18&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.