← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-04-05 Fri | 0 | — | unknown | — | 79.2° 14:00 | 7.84 | 26% | 47.1° |
| 2041-04-06 Sat | 0 | — | unknown | — | 79.2° 13:55 | 7.78 | 36% | 58.4° |
| 2041-04-07 Sun | 0 | — | unknown | — | 79.2° 13:55 | 7.73 | 46% | 69.7° |
| 2041-04-08 Mon | 0 | — | unknown | — | 79.2° 13:50 | 7.67 | 55% | 80.9° |
| 2041-04-09 Tue | 0 | — | unknown | — | 79.2° 13:45 | 7.62 | 64% | 92.0° |
| 2041-04-10 Wed | 0 | — | unknown | — | 79.2° 13:40 | 7.56 | 73% | 103.1° |
| 2041-04-11 Thu | 0 | — | unknown | — | 79.2° 13:35 | 7.5 | 81% | 114.1° |
| 2041-04-12 Fri | 0 | — | unknown | — | 79.2° 13:35 | 7.44 | 88% | 125.0° |
| 2041-04-13 Sat | 0 | — | unknown | — | 79.2° 13:30 | 7.39 | 94% | 135.7° |
| 2041-04-14 Sun | 0 | — | unknown | — | 79.2° 13:25 | 7.33 | 98% | 145.9° |
| 2041-04-15 Mon | 0 | — | unknown | — | 79.2° 13:20 | 7.27 | 100% | 154.6° |
| 2041-04-16 Tue | 0 | — | unknown | — | 79.2° 13:15 | 7.21 | 100% | 159.4° |
| 2041-04-17 Wed | 0 | — | unknown | — | 79.2° 13:15 | 7.16 | 98% | 157.4° |
| 2041-04-18 Thu | 0 | — | unknown | — | 79.2° 13:10 | 7.1 | 94% | 149.5° |
| 2041-04-19 Fri | 0 | — | unknown | — | 79.2° 13:05 | 7.04 | 88% | 138.9° |
| 2041-04-20 Sat | 0 | — | unknown | — | 79.2° 13:00 | 6.98 | 79% | 127.0° |
| 2041-04-21 Sun | 0 | — | unknown | — | 79.2° 13:00 | 6.92 | 70% | 114.5° |
| 2041-04-22 Mon | 0 | — | unknown | — | 79.2° 12:55 | 6.87 | 59% | 101.5° |
| 2041-04-23 Tue | 0 | — | unknown | — | 79.2° 12:50 | 6.81 | 48% | 88.4° |
| 2041-04-24 Wed | 0 | — | unknown | — | 79.2° 12:45 | 6.75 | 36% | 75.1° |
| 2041-04-25 Thu | 0 | — | unknown | — | 79.2° 12:40 | 6.69 | 26% | 61.8° |
| 2041-04-26 Fri | 0 | — | unknown | — | 79.2° 12:40 | 6.63 | 16% | 48.8° |
| 2041-04-27 Sat | 0 | — | unknown | — | 79.2° 12:35 | 6.57 | 8% | 36.5° |
| 2041-04-28 Sun | 0 | — | unknown | — | 79.2° 12:30 | 6.52 | 3% | 26.1° |
| 2041-04-29 Mon | 0 | — | unknown | — | 79.2° 12:25 | 6.46 | 0% | 20.5° |
| 2041-04-30 Tue | 0 | — | unknown | — | 79.2° 12:20 | 6.4 | 0% | 23.2° |
| 2041-05-01 Wed | 0 | — | unknown | — | 79.2° 12:20 | 6.34 | 2% | 31.9° |
| 2041-05-02 Thu | 0 | — | unknown | — | 79.2° 12:15 | 6.28 | 7% | 42.6° |
| 2041-05-03 Fri | 0 | — | unknown | — | 79.2° 12:10 | 6.23 | 13% | 54.0° |
| 2041-05-04 Sat | 0 | — | unknown | — | 79.2° 12:05 | 6.17 | 21% | 65.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-04-05&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.