← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-03-20 Wed | 29 | — | unknown | 03:30–04:50 (good, 1.33 h) | 87.2° 09:25 | 8.7 | 91% | 106.5° |
| 2041-03-21 Thu | 29 | — | unknown | 03:30–04:50 (good, 1.33 h) | 87.2° 09:20 | 8.65 | 84% | 101.2° |
| 2041-03-22 Fri | 30 | — | unknown | 03:25–04:50 (good, 1.42 h) | 87.2° 09:15 | 8.6 | 76% | 95.4° |
| 2041-03-23 Sat | 31 | — | unknown | 03:15–04:45 (good, 1.5 h) | 87.2° 09:15 | 8.55 | 66% | 89.3° |
| 2041-03-24 Sun | 34 | — | unknown | 03:10–04:45 (good, 1.58 h) | 87.2° 09:10 | 8.49 | 56% | 83.0° |
| 2041-03-25 Mon | 37 | — | unknown | 02:50–04:40 (good, 1.83 h) | 87.2° 09:05 | 8.44 | 44% | 77.0° |
| 2041-03-26 Tue | 43 | — | unknown | 02:45–04:40 (good, 1.92 h) | 87.2° 09:00 | 8.39 | 33% | 71.4° |
| 2041-03-27 Wed | 48 | — | unknown | 02:40–04:40 (good, 2.0 h) | 87.2° 08:55 | 8.33 | 23% | 66.8° |
| 2041-03-28 Thu | 49 | — | unknown | 02:40–04:35 (good, 1.92 h) | 87.2° 08:55 | 8.28 | 14% | 63.6° |
| 2041-03-29 Fri | 50 | — | unknown | 02:35–04:35 (good, 2.0 h) | 87.2° 08:50 | 8.23 | 7% | 62.2° |
| 2041-03-30 Sat | 51 | — | unknown | 02:30–05:35 (good, 2.08 h) | 87.2° 09:45 | 8.17 | 2% | 62.8° |
| 2041-03-31 Sun | 52 | — | unknown | 03:25–05:30 (good, 2.08 h) | 87.2° 09:40 | 8.12 | 0% | 65.3° |
| 2041-04-01 Mon | 53 | — | unknown | 03:20–05:30 (good, 2.17 h) | 87.2° 09:35 | 8.06 | 1% | 69.3° |
| 2041-04-02 Tue | 53 | — | unknown | 03:20–05:25 (good, 2.08 h) | 87.2° 09:35 | 8.01 | 5% | 74.5° |
| 2041-04-03 Wed | 54 | — | unknown | 03:15–05:25 (good, 2.17 h) | 87.2° 09:30 | 7.95 | 10% | 80.3° |
| 2041-04-04 Thu | 56 | — | unknown | 03:10–05:25 (good, 2.25 h) | 87.2° 09:25 | 7.9 | 18% | 86.4° |
| 2041-04-05 Fri | 56 | — | unknown | 03:05–05:20 (good, 2.25 h) | 87.2° 09:20 | 7.84 | 26% | 92.4° |
| 2041-04-06 Sat | 58 | — | unknown | 03:00–05:20 (good, 2.33 h) | 87.2° 09:20 | 7.78 | 36% | 98.2° |
| 2041-04-07 Sun | 56 | — | unknown | 03:00–05:15 (good, 2.25 h) | 87.2° 09:15 | 7.73 | 46% | 103.5° |
| 2041-04-08 Mon | 57 | — | unknown | 03:05–05:15 (good, 2.17 h) | 87.2° 09:10 | 7.67 | 55% | 108.2° |
| 2041-04-09 Tue | 58 | — | unknown | 03:00–05:15 (good, 2.25 h) | 87.2° 09:05 | 7.62 | 64% | 112.1° |
| 2041-04-10 Wed | 56 | — | unknown | 02:55–05:10 (good, 2.25 h) | 87.2° 09:00 | 7.56 | 73% | 115.2° |
| 2041-04-11 Thu | 52 | — | unknown | 02:55–05:10 (good, 2.25 h) | 87.2° 09:00 | 7.5 | 81% | 117.1° |
| 2041-04-12 Fri | 51 | — | unknown | 02:50–05:05 (good, 2.25 h) | 87.2° 08:55 | 7.44 | 88% | 117.8° |
| 2041-04-13 Sat | 50 | — | unknown | 02:50–05:05 (good, 2.25 h) | 87.2° 08:50 | 7.39 | 94% | 117.2° |
| 2041-04-14 Sun | 49 | — | unknown | 02:50–05:05 (good, 2.25 h) | 87.2° 08:45 | 7.33 | 98% | 115.3° |
| 2041-04-15 Mon | 47 | — | unknown | 02:50–05:00 (good, 2.17 h) | 87.2° 08:40 | 7.27 | 100% | 112.1° |
| 2041-04-16 Tue | 45 | — | unknown | 02:45–05:00 (good, 2.25 h) | 87.2° 08:40 | 7.21 | 100% | 107.9° |
| 2041-04-17 Wed | 43 | — | unknown | 02:45–04:55 (good, 2.17 h) | 87.2° 08:35 | 7.16 | 98% | 102.8° |
| 2041-04-18 Thu | 42 | — | unknown | 02:45–04:55 (good, 2.17 h) | 87.2° 08:30 | 7.1 | 94% | 97.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-03-20&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.