← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-05-12 Thu | 42 | — | unknown | 02:30–04:10 (good, 1.67 h) | 71.1° 06:00 | 5.7 | 99% | 75.7° |
| 2044-05-13 Fri | 40 | — | unknown | 02:50–04:10 (good, 1.33 h) | 71.1° 05:55 | 5.65 | 96% | 67.8° |
| 2044-05-14 Sat | 38 | — | unknown | 03:00–04:10 (good, 1.17 h) | 71.1° 05:50 | 5.6 | 92% | 60.5° |
| 2044-05-15 Sun | 39 | — | unknown | 02:45–04:05 (good, 1.33 h) | 71.1° 05:45 | 5.54 | 86% | 54.2° |
| 2044-05-16 Mon | 51 | — | unknown | 01:40–04:05 (good, 2.42 h) | 71.1° 05:40 | 5.49 | 79% | 49.2° |
| 2044-05-17 Tue | 61 | — | unknown | 00:35–04:05 (good, 3.5 h) | 71.1° 05:40 | 5.44 | 71% | 46.1° |
| 2044-05-18 Wed | 70 | — | unknown | 00:35–04:00 (good, 3.42 h) | 71.1° 05:35 | 5.39 | 62% | 45.2° |
| 2044-05-19 Thu | 78 | — | unknown | 00:30–04:00 (good, 3.5 h) | 71.1° 05:30 | 5.34 | 52% | 46.9° |
| 2044-05-20 Fri | 85 | — | unknown | 00:25–04:00 (good, 3.58 h) | 71.1° 05:25 | 5.29 | 42% | 51.0° |
| 2044-05-21 Sat | 91 | — | unknown | 00:20–03:55 (good, 3.58 h) | 71.1° 05:20 | 5.24 | 32% | 57.1° |
| 2044-05-22 Sun | 97 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:20 | 5.19 | 23% | 64.8° |
| 2044-05-23 Mon | 100 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:15 | 5.14 | 14% | 73.8° |
| 2044-05-24 Tue | 100 | — | unknown | 00:10–03:55 (good, 3.75 h) | 71.1° 05:10 | 5.1 | 7% | 83.6° |
| 2044-05-25 Wed | 100 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 05:05 | 5.05 | 2% | 93.9° |
| 2044-05-26 Thu | 100 | — | unknown | 00:00–03:50 (good, 3.83 h) | 71.1° 05:05 | 5.01 | 0% | 104.4° |
| 2044-05-27 Fri | 100 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 05:00 | 4.97 | 1% | 114.3° |
| 2044-05-28 Sat | 100 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 04:55 | 4.92 | 5% | 123.2° |
| 2044-05-29 Sun | 100 | — | unknown | 23:50–03:50 (good, 4.0 h) | 71.1° 04:50 | 4.88 | 11% | 130.1° |
| 2044-05-30 Mon | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.85 | 20% | 134.1° |
| 2044-05-31 Tue | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.81 | 30% | 134.7° |
| 2044-06-01 Wed | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 71.1° 04:40 | 4.77 | 41% | 132.0° |
| 2044-06-02 Thu | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 71.1° 04:35 | 4.74 | 52% | 126.7° |
| 2044-06-03 Fri | 100 | — | unknown | 23:35–03:45 (good, 4.17 h) | 71.1° 04:30 | 4.7 | 62% | 119.7° |
| 2044-06-04 Sat | 100 | — | unknown | 23:35–03:40 (good, 4.08 h) | 71.1° 04:25 | 4.67 | 72% | 111.8° |
| 2044-06-05 Sun | 100 | — | unknown | 23:40–03:40 (good, 4.0 h) | 71.1° 04:25 | 4.64 | 80% | 103.4° |
| 2044-06-06 Mon | 98 | — | unknown | 23:40–03:40 (good, 4.0 h) | 71.1° 04:20 | 4.62 | 88% | 94.8° |
| 2044-06-07 Tue | 75 | — | unknown | 23:55–03:40 (good, 3.75 h) | 71.1° 04:15 | 4.59 | 93% | 86.2° |
| 2044-06-08 Wed | 65 | — | unknown | 00:30–03:40 (good, 3.17 h) | 71.1° 04:10 | 4.56 | 97% | 77.8° |
| 2044-06-09 Thu | 56 | — | unknown | 01:05–03:40 (good, 2.58 h) | 71.1° 04:10 | 4.54 | 99% | 69.7° |
| 2044-06-10 Fri | 50 | — | unknown | 01:45–03:40 (good, 1.92 h) | 71.1° 04:05 | 4.52 | 100% | 62.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-05-12&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.