← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-03-26 Tue | 22 | — | unknown | 20:15–21:00 (good, 0.75 h) | 42.9° 17:40 | 8.39 | 33% | 133.7° |
| 2041-03-27 Wed | 20 | — | unknown | 20:20–20:55 (good, 0.58 h) | 42.9° 17:35 | 8.33 | 23% | 123.1° |
| 2041-03-28 Thu | 18 | — | unknown | 20:20–20:50 (good, 0.5 h) | 42.9° 17:35 | 8.28 | 14% | 111.3° |
| 2041-03-29 Fri | 17 | — | unknown | 20:20–20:50 (good, 0.5 h) | 42.9° 17:30 | 8.23 | 7% | 98.9° |
| 2041-03-30 Sat | 15 | — | unknown | 20:20–20:45 (good, 0.42 h) | 42.9° 17:25 | 8.17 | 2% | 86.3° |
| 2041-03-31 Sun | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 42.9° 18:20 | 8.12 | 0% | 73.8° |
| 2041-04-01 Mon | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 42.9° 18:15 | 8.06 | 1% | 61.9° |
| 2041-04-02 Tue | 10 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:15 | 8.01 | 5% | 50.9° |
| 2041-04-03 Wed | 7 | — | unknown | 21:30–22:00 (marginal, 0.5 h) | 42.9° 18:10 | 7.95 | 10% | 41.5° |
| 2041-04-04 Thu | 5 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 42.9° 18:05 | 7.9 | 18% | 34.8° |
| 2041-04-05 Fri | 4 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.84 | 26% | 31.8° |
| 2041-04-06 Sat | 3 | — | unknown | 21:30–21:45 (marginal, 0.25 h) | 42.9° 17:55 | 7.78 | 36% | 33.3° |
| 2041-04-07 Sun | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 42.9° 17:55 | 7.73 | 46% | 38.4° |
| 2041-04-08 Mon | 1 | — | unknown | — | 42.9° 17:50 | 7.67 | 55% | 45.7° |
| 2041-04-09 Tue | 1 | — | unknown | — | 42.9° 17:45 | 7.62 | 64% | 54.3° |
| 2041-04-10 Wed | 0 | — | unknown | — | 42.9° 17:40 | 7.56 | 73% | 63.7° |
| 2041-04-11 Thu | 0 | — | unknown | — | 42.9° 17:40 | 7.5 | 81% | 73.4° |
| 2041-04-12 Fri | 0 | — | unknown | — | 42.9° 17:35 | 7.44 | 88% | 83.5° |
| 2041-04-13 Sat | 0 | — | unknown | — | 42.9° 17:30 | 7.39 | 94% | 93.7° |
| 2041-04-14 Sun | 0 | — | unknown | — | 42.9° 17:25 | 7.33 | 98% | 104.1° |
| 2041-04-15 Mon | 0 | — | unknown | — | 42.9° 17:20 | 7.27 | 100% | 114.4° |
| 2041-04-16 Tue | 0 | — | unknown | — | 42.9° 17:20 | 7.21 | 100% | 124.5° |
| 2041-04-17 Wed | 0 | — | unknown | — | 42.9° 17:15 | 7.16 | 98% | 133.9° |
| 2041-04-18 Thu | 0 | — | unknown | — | 42.9° 17:10 | 7.1 | 94% | 141.9° |
| 2041-04-19 Fri | 0 | — | unknown | — | 42.9° 17:05 | 7.04 | 88% | 147.1° |
| 2041-04-20 Sat | 0 | — | unknown | — | 42.9° 17:00 | 6.98 | 79% | 147.9° |
| 2041-04-21 Sun | 0 | — | unknown | — | 42.9° 17:00 | 6.92 | 70% | 143.8° |
| 2041-04-22 Mon | 0 | — | unknown | — | 42.9° 16:55 | 6.87 | 59% | 135.9° |
| 2041-04-23 Tue | 0 | — | unknown | — | 42.9° 16:50 | 6.81 | 48% | 125.9° |
| 2041-04-24 Wed | 0 | — | unknown | — | 42.9° 16:45 | 6.75 | 36% | 114.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-03-26&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.