← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-04-01 Wed | 0 | 0 | 0 | — | 79.1° 14:15 | 8.08 | 100% | 152.1° |
| 2026-04-02 Thu | 0 | 0 | 0 | — | 79.1° 14:15 | 8.03 | 99% | 161.3° |
| 2026-04-03 Fri | 0 | 0 | 0 | — | 79.1° 14:10 | 7.97 | 96% | 164.8° |
| 2026-04-04 Sat | 0 | 0 | 0 | — | 79.1° 14:05 | 7.92 | 92% | 159.9° |
| 2026-04-05 Sun | 0 | 0 | 0 | — | 79.1° 14:00 | 7.86 | 86% | 150.8° |
| 2026-04-06 Mon | 0 | 0 | 0 | — | 79.1° 13:55 | 7.8 | 79% | 140.3° |
| 2026-04-07 Tue | 0 | 0 | 0 | — | 79.1° 13:55 | 7.75 | 71% | 129.3° |
| 2026-04-08 Wed | 0 | 0 | 0 | — | 79.1° 13:50 | 7.69 | 62% | 118.0° |
| 2026-04-09 Thu | 0 | 0 | 0 | — | 79.1° 13:45 | 7.64 | 53% | 106.6° |
| 2026-04-10 Fri | 0 | 0 | 0 | — | 79.1° 13:40 | 7.58 | 43% | 94.9° |
| 2026-04-11 Sat | 0 | 0 | 0 | — | 79.1° 13:40 | 7.52 | 33% | 82.9° |
| 2026-04-12 Sun | 0 | 0 | 0 | — | 79.1° 13:35 | 7.47 | 24% | 70.7° |
| 2026-04-13 Mon | 0 | 0 | 0 | — | 79.1° 13:30 | 7.41 | 16% | 58.1° |
| 2026-04-14 Tue | 0 | 0 | 0 | — | 79.1° 13:25 | 7.35 | 9% | 45.3° |
| 2026-04-15 Wed | 0 | 0 | 0 | — | 79.1° 13:20 | 7.29 | 3% | 32.6° |
| 2026-04-16 Thu | 0 | 0 | 0 | — | 79.1° 13:20 | 7.24 | 0% | 21.0° |
| 2026-04-17 Fri | 0 | 0 | 0 | — | 79.1° 13:15 | 7.18 | 0% | 15.1° |
| 2026-04-18 Sat | 0 | 0 | 0 | — | 79.1° 13:10 | 7.12 | 3% | 21.0° |
| 2026-04-19 Sun | 0 | 0 | 0 | — | 79.1° 13:05 | 7.06 | 9% | 33.0° |
| 2026-04-20 Mon | 0 | 0 | 0 | — | 79.1° 13:00 | 7.0 | 16% | 46.4° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-04-01&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.