← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-04-17 Sun | 32 | — | unknown | 03:10–04:55 (good, 1.75 h) | 71.1° 07:35 | 7.14 | 73% | 58.6° |
| 2044-04-18 Mon | 35 | — | unknown | 02:55–04:55 (good, 2.0 h) | 71.1° 07:30 | 7.08 | 65% | 52.7° |
| 2044-04-19 Tue | 46 | — | unknown | 02:25–04:55 (good, 2.5 h) | 71.1° 07:30 | 7.02 | 55% | 48.2° |
| 2044-04-20 Wed | 52 | — | unknown | 02:25–04:50 (good, 2.42 h) | 71.1° 07:25 | 6.97 | 46% | 45.8° |
| 2044-04-21 Thu | 58 | — | unknown | 02:20–04:50 (good, 2.5 h) | 71.1° 07:20 | 6.91 | 36% | 45.7° |
| 2044-04-22 Fri | 62 | — | unknown | 02:15–04:45 (good, 2.5 h) | 71.1° 07:15 | 6.85 | 27% | 48.2° |
| 2044-04-23 Sat | 66 | — | unknown | 02:10–04:45 (good, 2.58 h) | 71.1° 07:10 | 6.79 | 18% | 53.2° |
| 2044-04-24 Sun | 68 | — | unknown | 02:05–04:45 (good, 2.67 h) | 71.1° 07:10 | 6.73 | 11% | 60.1° |
| 2044-04-25 Mon | 69 | — | unknown | 02:05–04:40 (good, 2.58 h) | 71.1° 07:05 | 6.67 | 5% | 68.5° |
| 2044-04-26 Tue | 71 | — | unknown | 02:00–04:40 (good, 2.67 h) | 71.1° 07:00 | 6.62 | 1% | 78.0° |
| 2044-04-27 Wed | 71 | — | unknown | 01:55–04:40 (good, 2.75 h) | 71.1° 06:55 | 6.56 | 0% | 88.1° |
| 2044-04-28 Thu | 72 | — | unknown | 01:50–04:35 (good, 2.75 h) | 71.1° 06:55 | 6.5 | 2% | 98.4° |
| 2044-04-29 Fri | 74 | — | unknown | 01:45–04:35 (good, 2.83 h) | 71.1° 06:50 | 6.44 | 6% | 108.5° |
| 2044-04-30 Sat | 74 | — | unknown | 01:45–04:30 (good, 2.75 h) | 71.1° 06:45 | 6.38 | 14% | 117.9° |
| 2044-05-01 Sun | 76 | — | unknown | 01:40–04:30 (good, 2.83 h) | 71.1° 06:40 | 6.33 | 23% | 125.8° |
| 2044-05-02 Mon | 76 | — | unknown | 01:40–04:30 (good, 2.83 h) | 71.1° 06:35 | 6.27 | 33% | 131.6° |
| 2044-05-03 Tue | 76 | — | unknown | 01:35–04:25 (good, 2.83 h) | 71.1° 06:35 | 6.21 | 44% | 134.4° |
| 2044-05-04 Wed | 77 | — | unknown | 01:35–04:25 (good, 2.83 h) | 71.1° 06:30 | 6.15 | 56% | 134.0° |
| 2044-05-05 Thu | 78 | — | unknown | 01:30–04:25 (good, 2.92 h) | 71.1° 06:25 | 6.1 | 66% | 130.6° |
| 2044-05-06 Fri | 76 | — | unknown | 01:30–04:20 (good, 2.83 h) | 71.1° 06:20 | 6.04 | 76% | 124.9° |
| 2044-05-07 Sat | 76 | — | unknown | 01:25–04:20 (good, 2.92 h) | 71.1° 06:15 | 5.98 | 84% | 117.8° |
| 2044-05-08 Sun | 66 | — | unknown | 01:25–04:20 (good, 2.92 h) | 71.1° 06:15 | 5.93 | 91% | 109.8° |
| 2044-05-09 Mon | 59 | — | unknown | 01:30–04:15 (good, 2.75 h) | 71.1° 06:10 | 5.87 | 96% | 101.3° |
| 2044-05-10 Tue | 53 | — | unknown | 01:35–04:15 (good, 2.67 h) | 71.1° 06:05 | 5.81 | 99% | 92.6° |
| 2044-05-11 Wed | 47 | — | unknown | 02:05–04:15 (good, 2.17 h) | 71.1° 06:00 | 5.76 | 100% | 84.1° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-04-17&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.