← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-04-09 Wed | 0 | — | unknown | — | 79.1° 13:45 | 7.6 | 99% | 146.8° |
| 2036-04-10 Thu | 0 | — | unknown | — | 79.2° 13:40 | 7.55 | 100% | 154.1° |
| 2036-04-11 Fri | 0 | — | unknown | — | 79.2° 13:35 | 7.49 | 98% | 155.6° |
| 2036-04-12 Sat | 0 | — | unknown | — | 79.1° 13:30 | 7.43 | 95% | 150.8° |
| 2036-04-13 Sun | 0 | — | unknown | — | 79.1° 13:30 | 7.38 | 89% | 142.3° |
| 2036-04-14 Mon | 0 | — | unknown | — | 79.2° 13:25 | 7.32 | 82% | 132.3° |
| 2036-04-15 Tue | 0 | — | unknown | — | 79.2° 13:20 | 7.26 | 74% | 121.8° |
| 2036-04-16 Wed | 0 | — | unknown | — | 79.1° 13:15 | 7.2 | 66% | 111.0° |
| 2036-04-17 Thu | 0 | — | unknown | — | 79.1° 13:10 | 7.14 | 56% | 100.3° |
| 2036-04-18 Fri | 0 | — | unknown | — | 79.1° 13:10 | 7.09 | 47% | 89.5° |
| 2036-04-19 Sat | 0 | — | unknown | — | 79.2° 13:05 | 7.03 | 37% | 78.6° |
| 2036-04-20 Sun | 0 | — | unknown | — | 79.2° 13:00 | 6.97 | 28% | 67.8° |
| 2036-04-21 Mon | 0 | — | unknown | — | 79.1° 12:55 | 6.91 | 20% | 57.1° |
| 2036-04-22 Tue | 0 | — | unknown | — | 79.1° 12:55 | 6.85 | 13% | 46.5° |
| 2036-04-23 Wed | 0 | — | unknown | — | 79.1° 12:50 | 6.8 | 7% | 36.6° |
| 2036-04-24 Thu | 0 | — | unknown | — | 79.2° 12:45 | 6.74 | 3% | 28.3° |
| 2036-04-25 Fri | 0 | — | unknown | — | 79.2° 12:40 | 6.68 | 0% | 24.2° |
| 2036-04-26 Sat | 0 | — | unknown | — | 79.1° 12:35 | 6.62 | 0% | 26.5° |
| 2036-04-27 Sun | 0 | — | unknown | — | 79.1° 12:35 | 6.56 | 3% | 34.4° |
| 2036-04-28 Mon | 0 | — | unknown | — | 79.2° 12:30 | 6.5 | 8% | 45.2° |
| 2036-04-29 Tue | 0 | — | unknown | — | 79.2° 12:25 | 6.45 | 15% | 57.2° |
| 2036-04-30 Wed | 0 | — | unknown | — | 79.1° 12:20 | 6.39 | 25% | 69.9° |
| 2036-05-01 Thu | 0 | — | unknown | — | 79.1° 12:15 | 6.33 | 35% | 82.8° |
| 2036-05-02 Fri | 0 | — | unknown | — | 79.1° 12:15 | 6.27 | 46% | 95.7° |
| 2036-05-03 Sat | 0 | — | unknown | — | 79.2° 12:10 | 6.21 | 58% | 108.6° |
| 2036-05-04 Sun | 0 | — | unknown | — | 79.2° 12:05 | 6.16 | 69% | 121.1° |
| 2036-05-05 Mon | 0 | — | unknown | — | 79.1° 12:00 | 6.1 | 78% | 133.0° |
| 2036-05-06 Tue | 0 | — | unknown | — | 79.1° 11:55 | 6.04 | 87% | 143.8° |
| 2036-05-07 Wed | 0 | — | unknown | — | 79.2° 11:50 | 5.99 | 93% | 152.2° |
| 2036-05-08 Thu | 0 | — | unknown | — | 79.2° 11:45 | 5.93 | 98% | 155.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-04-09&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.