← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-04-07 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° |
| 2041-04-19 Fri | 42 | — | unknown | 02:40–04:55 (good, 2.25 h) | 87.2° 08:25 | 7.04 | 88% | 90.8° |
| 2041-04-20 Sat | 43 | — | unknown | 02:30–04:50 (good, 2.33 h) | 87.2° 08:25 | 6.98 | 79% | 84.6° |
| 2041-04-21 Sun | 47 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:20 | 6.92 | 70% | 78.5° |
| 2041-04-22 Mon | 55 | — | unknown | 02:00–04:50 (good, 2.83 h) | 87.2° 08:15 | 6.87 | 59% | 72.8° |
| 2041-04-23 Tue | 63 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.2° 08:10 | 6.81 | 48% | 68.0° |
| 2041-04-24 Wed | 70 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.2° 08:05 | 6.75 | 36% | 64.5° |
| 2041-04-25 Thu | 73 | — | unknown | 01:50–04:40 (good, 2.83 h) | 87.2° 08:05 | 6.69 | 26% | 62.5° |
| 2041-04-26 Fri | 76 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.63 | 16% | 62.4° |
| 2041-04-27 Sat | 78 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.2° 07:55 | 6.57 | 8% | 64.1° |
| 2041-04-28 Sun | 78 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.52 | 3% | 67.6° |
| 2041-04-29 Mon | 80 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.46 | 0% | 72.2° |
| 2041-04-30 Tue | 79 | — | unknown | 01:30–04:30 (good, 3.0 h) | 87.2° 07:45 | 6.4 | 0% | 77.8° |
| 2041-05-01 Wed | 81 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.34 | 2% | 83.8° |
| 2041-05-02 Thu | 83 | — | unknown | 01:20–04:30 (good, 3.17 h) | 87.2° 07:35 | 6.28 | 7% | 90.0° |
| 2041-05-03 Fri | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.2° 07:30 | 6.23 | 13% | 95.9° |
| 2041-05-04 Sat | 85 | — | unknown | 01:10–04:25 (good, 3.25 h) | 87.2° 07:30 | 6.17 | 21% | 101.5° |
| 2041-05-05 Sun | 85 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.2° 07:25 | 6.11 | 29% | 106.6° |
| 2041-05-06 Mon | 85 | — | unknown | 01:10–04:20 (good, 3.17 h) | 87.2° 07:20 | 6.05 | 38% | 110.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-04-07&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.