← 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. |
|---|---|---|---|---|---|---|---|---|
| 2029-04-08 Sun | 0 | — | unknown | — | 89.5° 13:00 | 7.68 | 21% | 65.5° |
| 2029-04-09 Mon | 0 | — | unknown | — | 89.6° 12:55 | 7.62 | 14% | 55.5° |
| 2029-04-10 Tue | 0 | — | unknown | — | 89.7° 12:50 | 7.56 | 8% | 46.1° |
| 2029-04-11 Wed | 0 | — | unknown | — | 89.7° 12:45 | 7.51 | 4% | 37.9° |
| 2029-04-12 Thu | 0 | — | unknown | — | 89.6° 12:40 | 7.45 | 1% | 31.7° |
| 2029-04-13 Fri | 0 | — | unknown | — | 89.5° 12:40 | 7.39 | 0% | 28.7° |
| 2029-04-14 Sat | 0 | — | unknown | — | 89.7° 12:35 | 7.33 | 1% | 30.0° |
| 2029-04-15 Sun | 0 | — | unknown | — | 89.7° 12:30 | 7.28 | 4% | 35.2° |
| 2029-04-16 Mon | 0 | — | unknown | — | 89.7° 12:25 | 7.22 | 8% | 43.0° |
| 2029-04-17 Tue | 0 | — | unknown | — | 89.5° 12:20 | 7.16 | 14% | 52.2° |
| 2029-04-18 Wed | 0 | — | unknown | — | 89.6° 12:20 | 7.1 | 22% | 62.3° |
| 2029-04-19 Thu | 0 | — | unknown | — | 89.7° 12:15 | 7.05 | 31% | 73.0° |
| 2029-04-20 Fri | 0 | — | unknown | — | 89.7° 12:10 | 6.99 | 40% | 84.2° |
| 2029-04-21 Sat | 0 | — | unknown | — | 89.6° 12:05 | 6.93 | 51% | 95.8° |
| 2029-04-22 Sun | 0 | — | unknown | — | 89.6° 12:00 | 6.87 | 62% | 107.7° |
| 2029-04-23 Mon | 0 | — | unknown | — | 89.7° 11:55 | 6.81 | 73% | 119.6° |
| 2029-04-24 Tue | 0 | — | unknown | — | 89.7° 11:50 | 6.75 | 82% | 131.3° |
| 2029-04-25 Wed | 0 | — | unknown | — | 89.6° 11:45 | 6.7 | 90% | 141.8° |
| 2029-04-26 Thu | 1 | — | unknown | — | 89.5° 11:45 | 6.64 | 96% | 149.4° |
| 2029-04-27 Fri | 1 | — | unknown | — | 89.7° 11:40 | 6.58 | 99% | 151.1° |
| 2029-04-28 Sat | 1 | — | unknown | — | 89.7° 11:35 | 6.52 | 100% | 146.1° |
| 2029-04-29 Sun | 1 | — | unknown | — | 89.7° 11:30 | 6.46 | 97% | 136.8° |
| 2029-04-30 Mon | 1 | — | unknown | — | 89.5° 11:25 | 6.41 | 91% | 125.5° |
| 2029-05-01 Tue | 1 | — | unknown | — | 89.6° 11:25 | 6.35 | 84% | 113.7° |
| 2029-05-02 Wed | 1 | — | unknown | — | 89.7° 11:20 | 6.29 | 75% | 101.9° |
| 2029-05-03 Thu | 1 | — | unknown | — | 89.7° 11:15 | 6.23 | 65% | 90.3° |
| 2029-05-04 Fri | 1 | — | unknown | — | 89.6° 11:10 | 6.17 | 55% | 79.0° |
| 2029-05-05 Sat | 1 | — | unknown | — | 89.5° 11:10 | 6.12 | 45% | 68.2° |
| 2029-05-06 Sun | 1 | — | unknown | — | 89.6° 11:05 | 6.06 | 35% | 58.0° |
| 2029-05-07 Mon | 1 | — | unknown | — | 89.7° 11:00 | 6.0 | 26% | 48.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2029-04-08&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.