← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-04-27 Wed | 77 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.3° 07:55 | 6.56 | 0% | 71.1° |
| 2044-04-28 Thu | 78 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.3° 07:50 | 6.5 | 2% | 78.1° |
| 2044-04-29 Fri | 80 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.44 | 6% | 85.8° |
| 2044-04-30 Sat | 80 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.38 | 14% | 93.6° |
| 2044-05-01 Sun | 81 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.33 | 23% | 101.2° |
| 2044-05-02 Mon | 82 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.3° 07:35 | 6.27 | 33% | 108.1° |
| 2044-05-03 Tue | 82 | — | unknown | 01:20–04:25 (good, 3.08 h) | 87.3° 07:30 | 6.21 | 44% | 114.0° |
| 2044-05-04 Wed | 82 | — | unknown | 01:20–04:25 (good, 3.08 h) | 87.2° 07:25 | 6.15 | 56% | 118.5° |
| 2044-05-05 Thu | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.2° 07:25 | 6.1 | 66% | 121.2° |
| 2044-05-06 Fri | 82 | — | unknown | 01:15–04:20 (good, 3.08 h) | 87.3° 07:20 | 6.04 | 76% | 122.1° |
| 2044-05-07 Sat | 82 | — | unknown | 01:10–04:20 (good, 3.17 h) | 87.3° 07:15 | 5.98 | 84% | 121.1° |
| 2044-05-08 Sun | 75 | — | unknown | 01:10–04:20 (good, 3.17 h) | 87.3° 07:10 | 5.93 | 91% | 118.4° |
| 2044-05-09 Mon | 71 | — | unknown | 01:10–04:15 (good, 3.08 h) | 87.2° 07:05 | 5.87 | 96% | 114.4° |
| 2044-05-10 Tue | 67 | — | unknown | 01:10–04:15 (good, 3.08 h) | 87.2° 07:05 | 5.81 | 99% | 109.4° |
| 2044-05-11 Wed | 63 | — | unknown | 01:10–04:15 (good, 3.08 h) | 87.3° 07:00 | 5.76 | 100% | 103.6° |
| 2044-05-12 Thu | 59 | — | unknown | 01:10–04:10 (good, 3.0 h) | 87.3° 06:55 | 5.7 | 99% | 97.5° |
| 2044-05-13 Fri | 57 | — | unknown | 01:05–04:10 (good, 3.08 h) | 87.2° 06:50 | 5.65 | 96% | 91.2° |
| 2044-05-14 Sat | 56 | — | unknown | 01:00–04:10 (good, 3.17 h) | 87.2° 06:45 | 5.6 | 92% | 84.9° |
| 2044-05-15 Sun | 56 | — | unknown | 00:55–04:05 (good, 3.17 h) | 87.2° 06:45 | 5.54 | 86% | 78.8° |
| 2044-05-16 Mon | 64 | — | unknown | 00:25–04:05 (good, 3.67 h) | 87.3° 06:40 | 5.49 | 79% | 73.0° |
| 2044-05-17 Tue | 71 | — | unknown | 00:20–04:05 (good, 3.75 h) | 87.3° 06:35 | 5.44 | 71% | 67.8° |
| 2044-05-18 Wed | 78 | — | unknown | 00:15–04:00 (good, 3.75 h) | 87.2° 06:30 | 5.39 | 62% | 63.4° |
| 2044-05-19 Thu | 85 | — | unknown | 00:15–04:00 (good, 3.75 h) | 87.2° 06:30 | 5.34 | 52% | 60.1° |
| 2044-05-20 Fri | 91 | — | unknown | 00:10–04:00 (good, 3.83 h) | 87.3° 06:25 | 5.29 | 42% | 58.1° |
| 2044-05-21 Sat | 96 | — | unknown | 00:05–03:55 (good, 3.83 h) | 87.3° 06:20 | 5.24 | 32% | 57.9° |
| 2044-05-22 Sun | 99 | — | unknown | 00:00–03:55 (good, 3.92 h) | 87.3° 06:15 | 5.19 | 23% | 59.5° |
| 2044-05-23 Mon | 100 | — | unknown | 23:55–03:55 (good, 4.0 h) | 87.2° 06:10 | 5.14 | 14% | 63.1° |
| 2044-05-24 Tue | 100 | — | unknown | 23:55–03:55 (good, 4.0 h) | 87.2° 06:10 | 5.1 | 7% | 68.3° |
| 2044-05-25 Wed | 100 | — | unknown | 23:50–03:50 (good, 4.0 h) | 87.3° 06:05 | 5.05 | 2% | 75.0° |
| 2044-05-26 Thu | 100 | — | unknown | 23:45–03:50 (good, 4.08 h) | 87.3° 06:00 | 5.01 | 0% | 82.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-04-27&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.