← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-03-24 Sun | 26 | — | unknown | 20:15–21:10 (good, 0.92 h) | 72.5° 16:00 | 8.49 | 56% | 151.6° |
| 2041-03-25 Mon | 25 | — | unknown | 20:15–21:05 (good, 0.83 h) | 72.5° 15:55 | 8.44 | 44% | 137.9° |
| 2041-03-26 Tue | 23 | — | unknown | 20:15–21:05 (good, 0.83 h) | 72.5° 15:50 | 8.39 | 33% | 123.8° |
| 2041-03-27 Wed | 21 | — | unknown | 20:20–21:00 (good, 0.67 h) | 72.5° 15:50 | 8.33 | 23% | 109.4° |
| 2041-03-28 Thu | 20 | — | unknown | 20:20–20:55 (good, 0.58 h) | 72.5° 15:45 | 8.28 | 14% | 94.7° |
| 2041-03-29 Fri | 18 | — | unknown | 20:20–20:50 (good, 0.5 h) | 72.5° 15:40 | 8.23 | 7% | 80.0° |
| 2041-03-30 Sat | 16 | — | unknown | 20:20–20:50 (good, 0.5 h) | 72.5° 15:35 | 8.17 | 2% | 65.1° |
| 2041-03-31 Sun | 13 | — | unknown | 21:25–21:45 (good, 0.33 h) | 72.5° 16:35 | 8.12 | 0% | 50.4° |
| 2041-04-01 Mon | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 72.5° 16:30 | 8.06 | 1% | 35.9° |
| 2041-04-02 Tue | 10 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.5° 16:25 | 8.01 | 5% | 21.8° |
| 2041-04-03 Wed | 7 | — | unknown | 21:30–22:00 (marginal, 0.5 h) | 72.5° 16:20 | 7.95 | 10% | 8.3° |
| 2041-04-04 Thu | 6 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 72.5° 16:15 | 7.9 | 18% | 6.2° |
| 2041-04-05 Fri | 4 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 72.5° 16:15 | 7.84 | 26% | 18.7° |
| 2041-04-06 Sat | 3 | — | unknown | 21:30–21:45 (marginal, 0.25 h) | 72.5° 16:10 | 7.78 | 36% | 31.1° |
| 2041-04-07 Sun | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 72.5° 16:05 | 7.73 | 46% | 43.4° |
| 2041-04-08 Mon | 1 | — | unknown | — | 72.5° 16:00 | 7.67 | 55% | 55.4° |
| 2041-04-09 Tue | 1 | — | unknown | — | 72.5° 15:55 | 7.62 | 64% | 67.2° |
| 2041-04-10 Wed | 1 | — | unknown | — | 72.5° 15:55 | 7.56 | 73% | 79.0° |
| 2041-04-11 Thu | 1 | — | unknown | — | 72.5° 15:50 | 7.5 | 81% | 90.8° |
| 2041-04-12 Fri | 1 | — | unknown | — | 72.5° 15:45 | 7.44 | 88% | 102.8° |
| 2041-04-13 Sat | 0 | — | unknown | — | 72.5° 15:40 | 7.39 | 94% | 114.8° |
| 2041-04-14 Sun | 0 | — | unknown | — | 72.5° 15:40 | 7.33 | 98% | 127.0° |
| 2041-04-15 Mon | 0 | — | unknown | — | 72.5° 15:35 | 7.27 | 100% | 139.4° |
| 2041-04-16 Tue | 0 | — | unknown | — | 72.5° 15:30 | 7.21 | 100% | 152.1° |
| 2041-04-17 Wed | 0 | — | unknown | — | 72.5° 15:25 | 7.16 | 98% | 164.9° |
| 2041-04-18 Thu | 0 | — | unknown | — | 72.5° 15:20 | 7.1 | 94% | 176.7° |
| 2041-04-19 Fri | 0 | — | unknown | — | 72.5° 15:20 | 7.04 | 88% | 168.1° |
| 2041-04-20 Sat | 0 | — | unknown | — | 72.5° 15:15 | 6.98 | 79% | 154.7° |
| 2041-04-21 Sun | 0 | — | unknown | — | 72.5° 15:10 | 6.92 | 70% | 141.1° |
| 2041-04-22 Mon | 0 | — | unknown | — | 72.5° 15:05 | 6.87 | 59% | 127.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-03-24&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.