← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-03-27 Sun | 43 | — | unknown | 03:55–05:40 (good, 1.75 h) | 71.1° 09:00 | 8.32 | 3% | 55.9° |
| 2044-03-28 Mon | 43 | — | unknown | 03:55–05:35 (good, 1.67 h) | 71.1° 08:55 | 8.27 | 0% | 63.5° |
| 2044-03-29 Tue | 45 | — | unknown | 03:50–05:35 (good, 1.75 h) | 71.1° 08:50 | 8.21 | 0% | 72.3° |
| 2044-03-30 Wed | 44 | — | unknown | 03:45–05:30 (good, 1.75 h) | 71.1° 08:45 | 8.16 | 3% | 82.0° |
| 2044-03-31 Thu | 46 | — | unknown | 03:40–05:30 (good, 1.83 h) | 71.1° 08:45 | 8.1 | 8% | 92.0° |
| 2044-04-01 Fri | 48 | — | unknown | 03:35–05:30 (good, 1.92 h) | 71.1° 08:40 | 8.05 | 16% | 102.0° |
| 2044-04-02 Sat | 47 | — | unknown | 03:35–05:25 (good, 1.83 h) | 71.1° 08:35 | 7.99 | 25% | 111.6° |
| 2044-04-03 Sun | 49 | — | unknown | 03:30–05:25 (good, 1.92 h) | 71.1° 08:30 | 7.94 | 36% | 120.2° |
| 2044-04-04 Mon | 48 | — | unknown | 03:25–05:20 (good, 1.92 h) | 71.1° 08:25 | 7.88 | 47% | 127.4° |
| 2044-04-05 Tue | 49 | — | unknown | 03:25–05:20 (good, 1.92 h) | 71.1° 08:25 | 7.83 | 59% | 132.4° |
| 2044-04-06 Wed | 50 | — | unknown | 03:25–05:20 (good, 1.92 h) | 71.1° 08:20 | 7.77 | 70% | 134.5° |
| 2044-04-07 Thu | 49 | — | unknown | 03:20–05:15 (good, 1.92 h) | 71.1° 08:15 | 7.71 | 79% | 133.3° |
| 2044-04-08 Fri | 45 | — | unknown | 03:20–05:15 (good, 1.92 h) | 71.1° 08:10 | 7.66 | 87% | 129.3° |
| 2044-04-09 Sat | 45 | — | unknown | 03:15–05:15 (good, 2.0 h) | 71.1° 08:05 | 7.6 | 94% | 123.2° |
| 2044-04-10 Sun | 42 | — | unknown | 03:15–05:10 (good, 1.92 h) | 71.1° 08:05 | 7.54 | 98% | 115.7° |
| 2044-04-11 Mon | 40 | — | unknown | 03:15–05:10 (good, 1.92 h) | 71.1° 08:00 | 7.49 | 100% | 107.5° |
| 2044-04-12 Tue | 36 | — | unknown | 03:20–05:05 (good, 1.75 h) | 71.1° 07:55 | 7.43 | 100% | 98.9° |
| 2044-04-13 Wed | 33 | — | unknown | 03:25–05:05 (good, 1.67 h) | 71.1° 07:50 | 7.37 | 98% | 90.2° |
| 2044-04-14 Thu | 31 | — | unknown | 03:45–05:05 (good, 1.33 h) | 71.1° 07:50 | 7.31 | 94% | 81.6° |
| 2044-04-15 Fri | 30 | — | unknown | 03:50–05:00 (good, 1.17 h) | 71.1° 07:45 | 7.26 | 88% | 73.3° |
| 2044-04-16 Sat | 30 | — | unknown | 03:40–05:00 (good, 1.33 h) | 71.1° 07:40 | 7.2 | 81% | 65.6° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-03-27&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.