← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-04-21 Tue | 0 | 0 | 0 | — | 79.1° 13:00 | 6.95 | 26% | 60.2° |
| 2026-04-22 Wed | 0 | 0 | 0 | — | 79.1° 12:55 | 6.89 | 37% | 73.9° |
| 2026-04-23 Thu | 0 | 0 | 0 | — | 79.1° 12:50 | 6.83 | 48% | 87.4° |
| 2026-04-24 Fri | 0 | 0 | 0 | — | 79.1° 12:45 | 6.77 | 59% | 100.6° |
| 2026-04-25 Sat | 0 | 0 | 0 | — | 79.1° 12:45 | 6.71 | 69% | 113.4° |
| 2026-04-26 Sun | 0 | 0 | 0 | — | 79.1° 12:40 | 6.65 | 78% | 125.9° |
| 2026-04-27 Mon | 0 | 0 | 0 | — | 79.1° 12:35 | 6.6 | 86% | 137.9° |
| 2026-04-28 Tue | 0 | 0 | 0 | — | 79.1° 12:30 | 6.54 | 92% | 149.2° |
| 2026-04-29 Wed | 0 | 0 | 0 | — | 79.1° 12:25 | 6.48 | 97% | 159.1° |
| 2026-04-30 Thu | 0 | 0 | 0 | — | 79.1° 12:25 | 6.42 | 99% | 164.7° |
| 2026-05-01 Fri | 0 | 0 | 0 | — | 79.1° 12:20 | 6.36 | 100% | 162.0° |
| 2026-05-02 Sat | 0 | 0 | 0 | — | 79.1° 12:15 | 6.31 | 98% | 153.6° |
| 2026-05-03 Sun | 0 | 0 | 0 | — | 79.1° 12:10 | 6.25 | 95% | 143.4° |
| 2026-05-04 Mon | 0 | 0 | 0 | — | 79.1° 12:05 | 6.19 | 91% | 132.5° |
| 2026-05-05 Tue | 0 | 0 | 0 | — | 79.1° 12:00 | 6.13 | 84% | 121.3° |
| 2026-05-06 Wed | 0 | 0 | 0 | — | 79.1° 11:55 | 6.08 | 77% | 110.0° |
| 2026-05-07 Thu | 0 | 0 | 0 | — | 79.1° 11:50 | 6.02 | 69% | 98.5° |
| 2026-05-08 Fri | 0 | 0 | 0 | — | 79.1° 11:50 | 5.96 | 59% | 86.8° |
| 2026-05-09 Sat | 0 | 0 | 0 | — | 79.1° 11:45 | 5.91 | 50% | 74.9° |
| 2026-05-10 Sun | 0 | 0 | 0 | — | 79.1° 11:40 | 5.85 | 40% | 62.7° |
| 2026-05-11 Mon | 0 | 0 | 0 | — | 79.1° 11:35 | 5.79 | 30% | 50.3° |
| 2026-05-12 Tue | 0 | 0 | 0 | — | 79.1° 11:30 | 5.74 | 20% | 37.8° |
| 2026-05-13 Wed | 0 | 0 | 0 | — | 79.1° 11:30 | 5.68 | 12% | 25.7° |
| 2026-05-14 Thu | 0 | 0 | 0 | — | 79.1° 11:25 | 5.63 | 5% | 16.4° |
| 2026-05-15 Fri | 0 | 0 | 0 | — | 79.1° 11:20 | 5.58 | 1% | 17.2° |
| 2026-05-16 Sat | 0 | 99 | 0 | — | 79.1° 11:15 | 5.52 | 0% | 27.6° |
| 2026-05-17 Sun | 0 | 0 | 0 | — | 79.1° 11:10 | 5.47 | 2% | 41.0° |
| 2026-05-18 Mon | 0 | 0 | 0 | — | 79.1° 11:10 | 5.42 | 7% | 55.1° |
| 2026-05-19 Tue | 0 | 0 | 0 | — | 79.1° 11:05 | 5.37 | 14% | 69.3° |
| 2026-05-20 Wed | 0 | 62 | 0 | — | 79.1° 11:00 | 5.32 | 23% | 83.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-04-21&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.